{"title":"FM CARBIDE TURNING","description":"\u003cstyle id=\"fm-chip-hover\"\u003e#fm-insert-nav a[style*=\"border:2px solid\"]{display:inline-block;transition:transform .15s ease,box-shadow .15s ease;}#fm-insert-nav a[style*=\"border:2px solid\"]:hover{transform:scale(1.08);box-shadow:0 3px 10px rgba(0,0,0,.18);background:#fff7ec!important;}\u003c\/style\u003e\n\u003cdiv id=\"fm-insert-nav\"\u003e\n\u003cp\u003e\u003cstrong\u003eFM Carbide Turning Inserts\u003c\/strong\u003e — premium indexable inserts in proven grades and chip breakers, at direct pricing.\u003c\/p\u003e\n\u003cp style=\"margin:10px 0 4px;\"\u003e\u003cstrong\u003eHow to read a title in 10 seconds:\u003c\/strong\u003e shape code (CNMG) → size (120404 metric \/ 431 inch — same insert, two names) → chip breaker (BF, BG, BL…) → grade (FM324, FM524…). \u003ca href=\"\/pages\/fm-carbide-grades-chip-breakers\"\u003e\u003cstrong\u003eSee the full chip breaker legend \u0026amp; cutting speed chart →\u003c\/strong\u003e\u003c\/a\u003e Or \u003ca href=\"\/pages\/contact-us\"\u003eask us\u003c\/a\u003e — machinist-to-machinist, we'll recommend one.\u003c\/p\u003e\n\u003cp style=\"margin:14px 0 6px;\"\u003e\u003cstrong\u003eJump to your insert shape:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:2.4;\"\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/cnmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eCNMG (27)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/tnmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eTNMG (24)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/dnmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eDNMG (16)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/vnmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eVNMG (11)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/wnmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eWNMG (11)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/ccmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eCCMT (6)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/cnma\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eCNMA (5)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/snmg\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eSNMG (5)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/rcmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eRCMT (4)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/snma\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eSNMA (4)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/vcmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eVCMT (4)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/dcmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eDCMT (3)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/tcmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eTCMT (3)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/tnux\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eTNUX (3)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/tnma\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eTNMA (2)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/wnma\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eWNMA (2)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/knux\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eKNUX (1)\u003c\/a\u003e\n\u003ca href=\"\/collections\/fm-carbide-inserts-turning\/vbmt\" style=\"border:2px solid #ED8B00;border-radius:6px;padding:6px 12px;margin:0 4px 4px 0;text-decoration:none;font-weight:700;color:#27282a;white-space:nowrap;\"\u003eVBMT (1)\u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp style=\"margin:10px 0 0;\"\u003eComplete your setup with \u003ca href=\"\/collections\/rmc-tool-holders\"\u003eCNC tool holders\u003c\/a\u003e and \u003ca href=\"\/collections\/rmc-boring-bars\"\u003ecarbide boring bars\u003c\/a\u003e, or browse \u003ca href=\"\/collections\/turning-inserts\"\u003eall turning inserts\u003c\/a\u003e from every brand we carry.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"fm500197","title":"CNMG 120404 Chip Breaker BG Grade FM524 \/ CNMG 431 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BG, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BG \/ FM500197","offer_id":39770072875194,"sku":"FM500197","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_f54afe21-3edd-4935-89bb-80923d7dbfd1.jpg?v=1621957583"},{"product_id":"fm200199","title":"CNMG 120404 Chip Breaker BG Grade FM2553 \/ CNMG 431 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BG, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BG \/ FM200199","offer_id":39770073366714,"sku":"FM200199","price":9.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_3fcbd27a-f8a2-4816-a159-f93e940ac74d.jpg?v=1621957586"},{"product_id":"fm500428","title":"CNMG 120404 Chip Breaker BL Grade FM524 \/ CNMG 431 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BL, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BL \/ FM500428","offer_id":39770073432250,"sku":"FM500428","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_346d39e5-c56b-4c49-a7f9-4a94d03658ab.jpg?v=1621957587"},{"product_id":"fm200137","title":"CNMG 120404 Chip Breaker BL Grade FM2543 \/ CNMG 431 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BL, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BL \/ FM200137","offer_id":39770073661626,"sku":"FM200137","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_40a470b9-4d02-4194-88a5-f5fb617dfbec.jpg?v=1621957590"},{"product_id":"fm200237","title":"CNMG 120404 Chip Breaker BL Grade FM2553 \/ CNMG 431 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BL, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BL \/ FM200237","offer_id":39770073923770,"sku":"FM200237","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_2673e2d4-1623-4fe9-8295-0b048e95bf49.jpg?v=1621957591"},{"product_id":"fm200238","title":"CNMG 120404 Chip Breaker BM Grade FM2533 \/ CNMG 431 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BM, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BM \/ FM200238","offer_id":39770074972346,"sku":"FM200238","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_bef5d7fa-dfbd-421e-acbe-96ff3a98749b.jpg?v=1621957594"},{"product_id":"fm200239","title":"CNMG 120404 Chip Breaker BM Grade FM2543 \/ CNMG 431 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BM, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BM \/ FM200239","offer_id":39770075005114,"sku":"FM200239","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_3df7c855-8c4a-46e8-93d2-3096fb3707bb.jpg?v=1621957595"},{"product_id":"fm200240","title":"CNMG 120404 Chip Breaker BM Grade FM2553 \/ CNMG 431 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120404 \/ CNMG 431, chip breaker BM, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/64\" corner radius. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 431\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/64\" (0.4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BM \/ FM200240","offer_id":39770075070650,"sku":"FM200240","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120404_BF_ISO_FM_Carbide_Insert_7a283fbd-6227-4bcd-b395-8f741fdfef4a.jpg?v=1621957596"},{"product_id":"fm200387","title":"CNMG 120408 Chip Breaker BC Grade FM2533 \/ CNMG 432 BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BC, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BC \/ FM200387","offer_id":39770075103418,"sku":"FM200387","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_5b21e534-e257-419b-83c9-855906c994f6.jpg?v=1623450901"},{"product_id":"fm200155","title":"CNMG 120408  Chip Breaker BC Grade FM2543 \/ CNMG 432 BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BC, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BC \/ FM200155","offer_id":39770075365562,"sku":"FM200155","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_44577708-3bbe-45f8-9217-2d1889f8f88a.jpg?v=1621957601"},{"product_id":"fm200388","title":"CNMG 120408 Chip Breaker  BC Grade FM2553 \/ CNMG 432 BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BC, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BC \/ FM200388","offer_id":39770075398330,"sku":"FM200388","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_3b7fa6c2-b9df-4ecf-b449-3059a61ff8e1.jpg?v=1621957602"},{"product_id":"fm500425","title":"CNMG 120408 Chip Breaker BF Grade  FM524 \/ CNMG 432 BF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BF, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BF breaker is the finishing geometry: 0.002–0.010 ipr (0.05–0.25 mm\/rev) at 0.02–0.06\" (0.5–1.5 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BF — Steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.002–0.010 ipr (0.05–0.25 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.02–0.06\" (0.5–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BF \/ FM500425","offer_id":39770075496634,"sku":"FM500425","price":8.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_57602150-1f9d-445b-a705-560a735c2786.jpg?v=1621957603"},{"product_id":"fm200244","title":"CNMG 120408 Chip Breaker  BF Grade FM2533 \/ CNMG 432 BF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BF, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BF breaker is the finishing geometry: 0.002–0.010 ipr (0.05–0.25 mm\/rev) at 0.02–0.06\" (0.5–1.5 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BF — Steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.002–0.010 ipr (0.05–0.25 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.02–0.06\" (0.5–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BF \/ FM200244","offer_id":39770075693242,"sku":"FM200244","price":9.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_caa23c01-1aa7-49c6-80ad-8f92f31d0603.jpg?v=1621957604"},{"product_id":"fm200480","title":"CNMG 120408 Chip Breaker  BF Grade FM2538 \/ CNMG 432 BF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BF, grade FM2538 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BF breaker is the finishing geometry: 0.002–0.010 ipr (0.05–0.25 mm\/rev) at 0.02–0.06\" (0.5–1.5 mm) depth of cut. FM2538 is a CVD grade — balanced productivity for continuous cuts — high wear resistance with improved toughness.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BF — Steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.002–0.010 ipr (0.05–0.25 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.02–0.06\" (0.5–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2538\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P10–P25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1340 SFM (170–410 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 430–1180 SFM (130–360 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 260–1020 SFM (80–310 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2538 \/ BF \/ FM200480","offer_id":39770075726010,"sku":"FM200480","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_db4e287f-bdcf-44fd-877d-a8ff3d9b59db.jpg?v=1621957605"},{"product_id":"fm200245","title":"CNMG 120408 Chip Breaker BF Grade FM2543 \/ CNMG 432 BF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BF, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BF breaker is the finishing geometry: 0.002–0.010 ipr (0.05–0.25 mm\/rev) at 0.02–0.06\" (0.5–1.5 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BF — Steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.002–0.010 ipr (0.05–0.25 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.02–0.06\" (0.5–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BF \/ FM200245","offer_id":39770075988154,"sku":"FM200245","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_591e8825-5243-4648-ad7e-43e82c7aa47e.jpg?v=1621957606"},{"product_id":"fm200246","title":"CNMG 120408 Chip Breaker BF Grade FM2553 \/ CNMG 432 BF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BF, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BF breaker is the finishing geometry: 0.002–0.010 ipr (0.05–0.25 mm\/rev) at 0.02–0.06\" (0.5–1.5 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BF — Steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.002–0.010 ipr (0.05–0.25 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.02–0.06\" (0.5–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BF \/ FM200246","offer_id":39770076053690,"sku":"FM200246","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_1588eec7-3a31-4d58-b601-464cbd970013.jpg?v=1621957607"},{"product_id":"fm500161","title":"CNMG 120408 Chip Breaker BG Grade FM524 \/ CNMG 432 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BG, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BG \/ FM500161","offer_id":39770076315834,"sku":"FM500161","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_a5a24d5e-d71d-4cd5-8fcb-f8d21e97e93a.jpg?v=1621957608"},{"product_id":"fm200162","title":"CNMG 120408 Chip Breaker BG Grade FM2533 \/ CNMG 432 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BG, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BG \/ FM200162","offer_id":39770076381370,"sku":"FM200162","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert.jpg?v=1621957609"},{"product_id":"fm200476","title":"CNMG 120408 Chip Breaker  BG Grade FM2538 \/ CNMG 432 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BG, grade FM2538 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2538 is a CVD grade — balanced productivity for continuous cuts — high wear resistance with improved toughness.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2538\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P10–P25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1340 SFM (170–410 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 430–1180 SFM (130–360 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 260–1020 SFM (80–310 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2538 \/ BG \/ FM200476","offer_id":39770076446906,"sku":"FM200476","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_86e7c4ce-0625-4da7-ab2e-2b41260ee50f.jpg?v=1621957610"},{"product_id":"fm200146","title":"CNMG 120408 Chip Breaker BG Grade FM2543 \/ CNMG 432 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BG, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BG \/ FM200146","offer_id":39770076479674,"sku":"FM200146","price":9.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_c92b9835-4cc7-4ae2-b408-3415cba32cfe.jpg?v=1621957611"},{"product_id":"fm200163","title":"CNMG 120408 Chip Breaker BG Grade FM2553 \/ CNMG 432 BG  #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BG, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BG \/ FM200163","offer_id":39770076807354,"sku":"FM200163","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_da5dc644-070a-40f0-b8b7-7c12ae292835.jpg?v=1621957613"},{"product_id":"fm500200","title":"CNMG 120408 Chip Breaker BL Grade FM524 \/ CNMG 432 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BL, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BL \/ FM500200","offer_id":39770076872890,"sku":"FM500200","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_103f9c0c-d99c-4e9a-93fa-70c038061a20.jpg?v=1621957614"},{"product_id":"fm200201","title":"CNMG 120408 Chip Breaker BL Grade FM2533 \/ CNMG 432 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BL, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BL \/ FM200201","offer_id":39770077135034,"sku":"FM200201","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_7cad7ea8-f90a-4138-9252-34df1658b9fb.jpg?v=1621957615"},{"product_id":"fm200138","title":"CNMG 120408 Chip Breaker BL Grade FM2543 \/ CNMG 432 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BL, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BL \/ FM200138","offer_id":39770077495482,"sku":"FM200138","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_4479da85-c6a4-487e-b9a4-d68cce3deab0.jpg?v=1621957616"},{"product_id":"fm200202","title":"CNMG 120408 Chip Breaker BL Grade FM2553 \/ CNMG 432 BL #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BL, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BL breaker is the semi-finishing geometry: 0.004–0.012 ipr (0.1–0.3 mm\/rev) at 0.04–0.12\" (1–3 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BL — Steel — semi-finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.004–0.012 ipr (0.1–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.12\" (1–3 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BL \/ FM200202","offer_id":39770077692090,"sku":"FM200202","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_eba3ebd6-b1fa-44e5-9bab-b054f656c59f.jpg?v=1621957617"},{"product_id":"fm200459","title":"CNMG 120408 Chip Breaker BMF Grade FM2553 \/ CNMG 432 BMF #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BMF, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BMF breaker is the finishing geometry: 0.003–0.012 ipr (0.07–0.3 mm\/rev) at 0.01–0.06\" (0.2–1.5 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BMF — Stainless steel — finishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.003–0.012 ipr (0.07–0.3 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.01–0.06\" (0.2–1.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BMF \/ FM200459","offer_id":39770077954234,"sku":"FM200459","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_55a17e3a-9c6c-4ac6-b600-ced14db1d598.jpg?v=1621957618"},{"product_id":"fm200503","title":"CNMG 120408 Chip Breaker BMM Grade FM2553 \/ CNMG 432 BMM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BMM, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BMM breaker is the medium \u0026amp; low-carbon steel geometry: 0.008–0.014 ipr (0.2–0.35 mm\/rev) at 0.04–0.14\" (1–3.5 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BMM — Stainless — medium \u0026amp; low-carbon steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.014 ipr (0.2–0.35 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.04–0.14\" (1–3.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BMM \/ FM200503","offer_id":39770077987002,"sku":"FM200503","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_939d0063-01e3-4048-9a9a-4c9db0820a1f.jpg?v=1621957619"},{"product_id":"fm200460","title":"CNMG 120408 Chip Breaker BMR Grade FM2553 \/ CNMG 432 BMR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BMR, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BMR breaker is the roughing geometry: 0.012–0.022 ipr (0.3–0.6 mm\/rev) at 0.07–0.22\" (1.8–5.5 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BMR — Stainless steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.022 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.07–0.22\" (1.8–5.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BMR \/ FM200460","offer_id":39770078249146,"sku":"FM200460","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_5c597548-19d1-4657-8757-454ccde155f3.jpg?v=1621957620"},{"product_id":"fm500164","title":"CNMG 120408 Chip Breaker BM Grade FM524 \/ CNMG 432 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BM, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BM \/ FM500164","offer_id":39770078281914,"sku":"FM500164","price":7.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_fefd6094-9baf-41b0-bac8-f797b6902656.jpg?v=1621957621"},{"product_id":"fm200165","title":"CNMG 120408 Chip Breaker BM Grade FM2533 \/ CNMG 432 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BM, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BM \/ FM200165","offer_id":39770078544058,"sku":"FM200165","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_9560e4da-9887-40e4-918d-9b2c140f0600.jpg?v=1621957622"},{"product_id":"fm200475","title":"CNMG 120408 Chip Breaker BM Grade FM2538 \/ CNMG 432 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BM, grade FM2538 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. FM2538 is a CVD grade — balanced productivity for continuous cuts — high wear resistance with improved toughness.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2538\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P10–P25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1340 SFM (170–410 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 430–1180 SFM (130–360 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 260–1020 SFM (80–310 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2538 \/ BM \/ FM200475","offer_id":39770078576826,"sku":"FM200475","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_2e0c2a24-40a8-4283-b267-0f12bbfe44b5.jpg?v=1621957623"},{"product_id":"fm200166","title":"CNMG 120408 Chip Breaker BM Grade FM2543 \/ CNMG 432 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BM, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BM \/ FM200166","offer_id":39770078609594,"sku":"FM200166","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_c6f96865-12cb-4fcf-93f9-c037b12408f0.jpg?v=1621957624"},{"product_id":"fm200167","title":"CNMG 120408 Chip Breaker BM Grade FM2553 \/ CNMG 432 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BM, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BM \/ FM200167","offer_id":39770078904506,"sku":"FM200167","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_39b222b3-1dbb-48cc-90fd-b745db41acc8.jpg?v=1621957625"},{"product_id":"fm500168","title":"CNMG 120408 Chip Breaker BR Grade FM524 \/ CNMG 432 BR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BR, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BR breaker is the roughing geometry: 0.012–0.024 ipr (0.3–0.6 mm\/rev) at 0.08–0.24\" (2–6 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BR — Steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.024 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.08–0.24\" (2–6 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BR \/ FM500168","offer_id":39770079166650,"sku":"FM500168","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_88ab94b0-3e32-4198-96eb-e70bc581c0ce.jpg?v=1621957627"},{"product_id":"fm200169","title":"CNMG 120408 Chip Breaker BR Grade FM2533 \/ CNMG 432 BR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BR, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BR breaker is the roughing geometry: 0.012–0.024 ipr (0.3–0.6 mm\/rev) at 0.08–0.24\" (2–6 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BR — Steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.024 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.08–0.24\" (2–6 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BR \/ FM200169","offer_id":39770079363258,"sku":"FM200169","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_d588c379-fb4b-44cc-9c03-a9f32bee1b22.jpg?v=1621957627"},{"product_id":"fm200170","title":"CNMG 120408 Chip Breaker  BR Grade FM2543 \/ CNMG 432 BR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BR, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BR breaker is the roughing geometry: 0.012–0.024 ipr (0.3–0.6 mm\/rev) at 0.08–0.24\" (2–6 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BR — Steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.024 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.08–0.24\" (2–6 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BR \/ FM200170","offer_id":39770079658170,"sku":"FM200170","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_9ca24bad-67c1-4e4a-bd7a-0e2f30454e1b.jpg?v=1621957629"},{"product_id":"fm200171","title":"CNMG 120408 Chip Breaker BR Grade FM2553 \/ CNMG 432 BR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120408 \/ CNMG 432, chip breaker BR, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BR breaker is the roughing geometry: 0.012–0.024 ipr (0.3–0.6 mm\/rev) at 0.08–0.24\" (2–6 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BR — Steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.024 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.08–0.24\" (2–6 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BR \/ FM200171","offer_id":39770079690938,"sku":"FM200171","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120408_BC_ISO_FM_Carbide_Insert_6250e780-3ab2-4935-9715-a58229876de9.jpg?v=1621957630"},{"product_id":"fm200389","title":"CNMG 120412 Chip Breaker BC Grade FM2533 \/ CNMG 433 BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BC, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BC \/ FM200389","offer_id":39770079953082,"sku":"FM200389","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_d9d11431-b86d-4a66-8441-70626223f370.jpg?v=1621957631"},{"product_id":"fm200159","title":"CNMG 120412 Chip Breaker BC Grade FM2543 \/ CNMG 433  BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BC, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BC \/ FM200159","offer_id":39770080018618,"sku":"FM200159","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_fec03f5a-f19f-4b7a-9460-b03f6e09af22.jpg?v=1621957632"},{"product_id":"fm200390","title":"CNMG 120412 Chip Breaker BC Grade FM2553 \/ CNMG 433 BC #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BC, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BC breaker is the medium roughing \u0026amp; cast iron geometry: 0.008–0.020 ipr (0.2–0.5 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BC — Steel — medium roughing \u0026amp; cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.020 ipr (0.2–0.5 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BC \/ FM200390","offer_id":39770080051386,"sku":"FM200390","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_33af6701-ac2a-455e-b647-8fa67abf7c71.jpg?v=1621957633"},{"product_id":"fm500203","title":"CNMG 120412 Chip Breaker BG Grade FM524 \/ CNMG 433 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BG, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BG \/ FM500203","offer_id":39770080313530,"sku":"FM500203","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_11789f6f-2830-421a-a9b3-65c4776c9f25.jpg?v=1621957634"},{"product_id":"fm200204","title":"CNMG 120412 Chip Breaker BG Grade FM2533 \/ CNMG 433 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BG, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BG \/ FM200204","offer_id":39770080346298,"sku":"FM200204","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_63ac67c8-bf77-4dd4-a734-ec557a358e9b.jpg?v=1621957635"},{"product_id":"fm200152","title":"CNMG 120412 Chip Breaker BG Grade FM2543 \/ CNMG 433 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BG, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BG \/ FM200152","offer_id":39770080379066,"sku":"FM200152","price":7.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_d27b4c28-4b17-4d86-b917-4f5ad506ca58.jpg?v=1621957636"},{"product_id":"fm200205","title":"CNMG 120412 Chip Breaker BG Grade FM2553 \/ CNMG 433 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BG, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BG \/ FM200205","offer_id":39770080411834,"sku":"FM200205","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_b28a1f7a-4bd5-4bbd-8f84-0c74d572bb51.jpg?v=1621957637"},{"product_id":"fm200462","title":"CNMG 120412 Chip Breaker BMR Grade FM2553 \/ CNMG 433 BMR #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BMR, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. The BMR breaker is the roughing geometry: 0.012–0.022 ipr (0.3–0.6 mm\/rev) at 0.07–0.22\" (1.8–5.5 mm) depth of cut. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BMR — Stainless steel — roughing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.012–0.022 ipr (0.3–0.6 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.07–0.22\" (1.8–5.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BMR \/ FM200462","offer_id":39770080673978,"sku":"FM200462","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_1ae1d602-a880-4a74-a98a-f04eed361816.jpg?v=1621957638"},{"product_id":"fm500391","title":"CNMG 120412 Chip Breaker BM Grade FM524 \/ CNMG 433 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BM, grade FM524 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BM \/ FM500391","offer_id":39770080706746,"sku":"FM500391","price":5.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert.jpg?v=1621957639"},{"product_id":"fm200252","title":"CNMG 120412 Chip Breaker BM Grade FM2533 \/ CNMG 433 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BM, grade FM2533 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. FM2533 is a CVD grade — stable steel applications and nodular cast iron — a balance of wear resistance and chipping resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2533\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P05–P20 · K15–K35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 560–1480 SFM (170–450 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 330–1080 SFM (100–330 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 390–980 SFM (120–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–920 SFM (120–280 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2533 \/ BM \/ FM200252","offer_id":39770080968890,"sku":"FM200252","price":8.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_1921684a-ae2c-486b-a0da-7b4d2ea526f6.jpg?v=1621957640"},{"product_id":"fm200253","title":"CNMG 120412 Chip Breaker BM Grade FM2543 \/ CNMG 433 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BM, grade FM2543 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. FM2543 is a CVD grade — first-choice grade for general steel work — continuous through interrupted cuts across steel applications.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2543\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P15–P30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 590–1250 SFM (180–380 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 380–1150 SFM (110–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 200–980 SFM (60–300 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2543 \/ BM \/ FM200253","offer_id":39770081034426,"sku":"FM200253","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_aaa859bf-06c1-4fef-bbb0-fb1e5af07780.jpg?v=1621957642"},{"product_id":"fm200254","title":"CNMG 120412 Chip Breaker BM Grade FM2553 \/ CNMG 433 BM #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eCNMG 120412 \/ CNMG 433, chip breaker BM, grade FM2553 — negative 80° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 3\/64\" corner radius. FM2553 is a CVD (Al₂O₃) grade — tough substrate for heavy interrupted cuts in steel and stainless, heavy roughing in mild steel, and first choice for superalloys.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e CNMG 120412\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e CNMG 433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 80° rhombic (C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 3\/64\" (1.19 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM2553\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD (Al₂O₃)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P20–P35 · M10–M30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 490–1150 SFM (150–350 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 300–980 SFM (90–300 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, high-alloy steel:\u003c\/strong\u003e 230–820 SFM (70–250 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, ferritic \u0026amp; martensitic stainless:\u003c\/strong\u003e 390–750 SFM (120–230 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, austenitic stainless:\u003c\/strong\u003e 260–660 SFM (80–200 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, titanium \u0026amp; super-alloys:\u003c\/strong\u003e 110–260 SFM (35–80 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e69 RMC toolholders in stock take this insert — 80° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e5\/8\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcgnl-10-4b\"\u003eMCGNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-10-4b\"\u003eMCGNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-10-4b\"\u003eMCLNL 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-10-4b\"\u003eMCLNR 10-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-10-4b\"\u003eMCYNN 10-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-12-4b\"\u003eMCFNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-12-4b\"\u003eMCFNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-12-4b\"\u003eMCGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-12-4b\"\u003eMCGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-12-4b\"\u003eMCKNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-12-4b\"\u003eMCKNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-12-4b\"\u003eMCLNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4b\"\u003eMCLNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-12-4c\"\u003eMCLNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-12-4b\"\u003eMCMNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-12-4b\"\u003eMCRNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-12-4b\"\u003eMCRNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4b\"\u003eMCYNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-12-4d\"\u003eMCYNN 12-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-16-4d\"\u003eMCFNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-16-4d\"\u003eMCFNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-16-4d\"\u003eMCGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-16-4d\"\u003eMCGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-16-4d\"\u003eMCKNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-16-4d\"\u003eMCKNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4c\"\u003eMCLNL 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-16-4d\"\u003eMCLNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4c\"\u003eMCLNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-16-4d\"\u003eMCLNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-16-4d\"\u003eMCMNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-16-4d\"\u003eMCRNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4c\"\u003eMCRNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-16-4d\"\u003eMCRNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-16-4d\"\u003eMCYNN 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnr-20-4e\"\u003eMCFNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-20-4d\"\u003eMCGNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4d\"\u003eMCGNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-20-4e\"\u003eMCGNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-20-4d\"\u003eMCKNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-20-4d\"\u003eMCKNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4d\"\u003eMCLNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-20-4e\"\u003eMCLNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4d\"\u003eMCLNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-20-4e\"\u003eMCLNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4d\"\u003eMCMNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-20-4e\"\u003eMCMNN 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-20-4d\"\u003eMCRNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4d\"\u003eMCRNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-20-4e\"\u003eMCRNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-20-4d\"\u003eMCYNN 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mclnl-24-4d\"\u003eMCLNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-24-4e\"\u003eMCLNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4d\"\u003eMCLNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-24-4e\"\u003eMCLNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-24-4e\"\u003eMCMNN 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-24-4e\"\u003eMCRNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-24-4e\"\u003eMCRNR 24-4E\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mcfnl-85-4d\"\u003eMCFNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcfnr-85-4d\"\u003eMCFNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnl-85-4d\"\u003eMCGNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcgnr-85-4d\"\u003eMCGNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknl-85-4d\"\u003eMCKNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcknr-85-4d\"\u003eMCKNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnl-85-4d\"\u003eMCLNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mclnr-85-4d\"\u003eMCLNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcmnn-85-4d\"\u003eMCMNN 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnl-85-4d\"\u003eMCRNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcrnr-85-4d\"\u003eMCRNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mcynn-85-4d\"\u003eMCYNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 66 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM2553 \/ BM \/ FM200254","offer_id":39770081231034,"sku":"FM200254","price":5.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/CNMG_120412_BC_ISO_FM_Carbide_Insert_313a43d5-687b-457b-a632-3d09e9d98883.jpg?v=1621957643"},{"product_id":"fm500206","title":"DNMG 150408 Chip Breaker BG Grade FM524 \/ DNMG 432 BG #FMCarbide","description":"\u003cp\u003e\u003cstrong\u003eDNMG 150408 \/ DNMG 432, chip breaker BG, grade FM524 — negative 55° rhombic turning insert.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e1\/2\" inscribed circle, 3\/16\" thick, 1\/32\" corner radius. The BG breaker is the medium machining geometry: 0.008–0.016 ipr (0.2–0.4 mm\/rev) at 0.06–0.16\" (1.5–4 mm) depth of cut. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (ISO):\u003c\/strong\u003e DNMG 150408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert designation (inch):\u003c\/strong\u003e DNMG 432\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert shape:\u003c\/strong\u003e 55° rhombic (D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance angle:\u003c\/strong\u003e 0° — negative (N)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance class:\u003c\/strong\u003e M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert type:\u003c\/strong\u003e G — with hole, chipbreaker both sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInscribed circle (I.C.):\u003c\/strong\u003e 1\/2\" (12.7 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 3\/16\" (4.76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner radius:\u003c\/strong\u003e 1\/32\" (0.79 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChip breaker:\u003c\/strong\u003e BG — Steel — medium machining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeed rate range:\u003c\/strong\u003e 0.008–0.016 ipr (0.2–0.4 mm\/rev)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth of cut range:\u003c\/strong\u003e 0.06–0.16\" (1.5–4 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade:\u003c\/strong\u003e FM524\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e CVD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO application range:\u003c\/strong\u003e P01–P10 · K10–K25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, non-alloy steel:\u003c\/strong\u003e 720–1570 SFM (220–480 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, low-alloy steel:\u003c\/strong\u003e 720–1380 SFM (220–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, grey cast iron:\u003c\/strong\u003e 560–1380 SFM (170–420 m\/min)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting speed, nodular cast iron:\u003c\/strong\u003e 390–1340 SFM (120–410 m\/min)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTool holders that accept this insert\u003c\/h3\u003e\u003cp\u003e34 RMC toolholders in stock take this insert — 55° rhombic, 0° — negative clearance, 1\/2\" inscribed circle, 3\/16\" thick. Pick by the shank your turret takes.\u003c\/p\u003e\u003ch4\u003eRMC square-shank toolholders — made in the USA\u003c\/h4\u003e\u003ctable style=\"width:100%;border-collapse:collapse\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e3\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mdgnl-12-4b\"\u003eMDGNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdgnr-12-4b\"\u003eMDGNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnl-12-4b\"\u003eMDJNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnl-12-4c\"\u003eMDJNL 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-12-4b\"\u003eMDJNR 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-12-4c\"\u003eMDJNR 12-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mdpnn-12-4b\"\u003eMDPNN 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnl-12-4b\"\u003eMDQNL 12-4B\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnr-12-4b\"\u003eMDQNR 12-4B\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mdgnl-16-4d\"\u003eMDGNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdgnr-16-4d\"\u003eMDGNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnl-16-4d\"\u003eMDJNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-16-4d\"\u003eMDJNR 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdpnn-16-4d\"\u003eMDPNN 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnl-16-4d\"\u003eMDQNL 16-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnr-16-4c\"\u003eMDQNR 16-4C\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnr-16-4d\"\u003eMDQNR 16-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mdjnl-20-4d\"\u003eMDJNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnl-20-4e\"\u003eMDJNL 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-20-4d\"\u003eMDJNR 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-20-4e\"\u003eMDJNR 20-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mdpnn-20-4d\"\u003eMDPNN 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnl-20-4d\"\u003eMDQNL 20-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnr-20-4d\"\u003eMDQNR 20-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1-1\/2\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mdjnl-24-4d\"\u003eMDJNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnl-24-4e\"\u003eMDJNL 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-24-4d\"\u003eMDJNR 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-24-4e\"\u003eMDJNR 24-4E\u003c\/a\u003e · \u003ca href=\"\/products\/mdpnn-24-4d\"\u003eMDPNN 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnl-24-4d\"\u003eMDQNL 24-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdqnr-24-4d\"\u003eMDQNR 24-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align:top;white-space:nowrap;padding:8px 14px 8px 0;border-bottom:1px solid #e1e3e3\"\u003e\u003cstrong\u003e1\" x 1-1\/4\" shank\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 0;border-bottom:1px solid #e1e3e3\"\u003e\n\u003ca href=\"\/products\/mdjnl-85-4d\"\u003eMDJNL 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdjnr-85-4d\"\u003eMDJNR 85-4D\u003c\/a\u003e · \u003ca href=\"\/products\/mdpnn-85-4d\"\u003eMDPNN 85-4D\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eBoring bars and interchangeable heads.\u003c\/strong\u003e 78 more RMC tools take the same insert for internal turning. \u003ca href=\"\/collections\/rmc-boring-bars\"\u003eSee RMC boring bars →\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin:20px 0 10px\"\u003e\u003ca class=\"fm-btn\" href=\"\/pages\/fm-carbide-grades-chip-breakers\" style=\"display:inline-block;background-color:#ED8B00;color:#ffffff;font-weight:600;text-decoration:none;padding:13px 26px;border-radius:6px;font-size:15px;line-height:1.2;letter-spacing:.01em\"\u003eGrade \u0026amp; chip breaker selection chart →\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/blogs\/techtalks\/turning-insert-designation-explained\"\u003eTurning insert designations explained\u003c\/a\u003e · \u003ca href=\"\/blogs\/techtalks\/using-a-turning-formula-calculator\"\u003eUsing a turning formula calculator\u003c\/a\u003e\u003c\/p\u003e","brand":"FM Carbide","offers":[{"title":"FM524 \/ BG \/ FM500206","offer_id":39770089095354,"sku":"FM500206","price":6.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/products\/DNMG150408-BL_ISO_847810a4-01ce-44bb-acc6-1518f45a0a67.jpg?v=1621957696"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/9796\/1325\/collections\/FM_Carbide_Inserts.jpg?v=1634156212","url":"https:\/\/fmcarbide.com\/collections\/fm-carbide-inserts-turning.oembed?page=9","provider":"FM Carbide","version":"1.0","type":"link"}