DCMT 070204 Chip Breaker BF Grade FM2533 / DCMT 21.51 BF #FMCarbide

DCMT 070204 / DCMT 21.51, chip breaker BF, grade FM2533 — positive 55° rhombic turning insert.

1/4" inscribed circle, 3/32" thick, 1/64" corner radius. The BF breaker is the Finishing geometry: 0.002–0.008 ipr (0.05–0.2 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.

Specifications

• Insert designation (ISO): DCMT 070204
• Insert designation (inch): DCMT 21.51
• Insert shape: 55° rhombic (D)
• Clearance angle: 7° (C)
• Tolerance class: M
• Insert type: T — with hole, countersunk one side, chipbreaker one side
• Inscribed circle (I.C.): 1/4" (6.35 mm)
• Thickness: 3/32" (2.38 mm)
• Corner radius: 1/64" (0.4 mm)
• Chip breaker: BF — Finishing
• Feed rate range: 0.002–0.008 ipr (0.05–0.2 mm/rev)
• Depth of cut range: 0.02–0.06" (0.5–1.5 mm)
• Grade: FM2533
• Coating: CVD
• ISO application range: P05–P20 · K15–K35
• Cutting speed, non-alloy steel: 560–1480 SFM (170–450 m/min)
• Cutting speed, low-alloy steel: 590–1250 SFM (180–380 m/min)
• Cutting speed, high-alloy steel: 330–1080 SFM (100–330 m/min)
• Cutting speed, grey cast iron: 390–980 SFM (120–300 m/min)
• Cutting speed, nodular cast iron: 390–920 SFM (120–280 m/min)

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