DNMG 150608 Chip Breaker BMR Grade FM2553 / DNMG 442 BMR #FMCarbide

DNMG 150608 / DNMG 442, chip breaker BMR, grade FM2553 — negative 55° rhombic turning insert.

1/2" inscribed circle, 1/4" 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.

Specifications

• Insert designation (ISO): DNMG 150608
• Insert designation (inch): DNMG 442
• Insert shape: 55° rhombic (D)
• Clearance angle: 0° — negative (N)
• Tolerance class: M
• Insert type: G — with hole, chipbreaker both sides
• Inscribed circle (I.C.): 1/2" (12.7 mm)
• Thickness: 1/4" (6.35 mm)
• Corner radius: 1/32" (0.79 mm)
• Chip breaker: BMR — Stainless steel — roughing
• Feed rate range: 0.012–0.022 ipr (0.3–0.6 mm/rev)
• Depth of cut range: 0.07–0.22" (1.8–5.5 mm)
• Grade: FM2553
• Coating: CVD (Al₂O₃)
• ISO application range: P20–P35 · M10–M30
• Cutting speed, non-alloy steel: 490–1150 SFM (150–350 m/min)
• Cutting speed, low-alloy steel: 300–980 SFM (90–300 m/min)
• Cutting speed, high-alloy steel: 230–820 SFM (70–250 m/min)
• Cutting speed, ferritic & martensitic stainless: 390–750 SFM (120–230 m/min)
• Cutting speed, austenitic stainless: 260–660 SFM (80–200 m/min)
• Cutting speed, titanium & super-alloys: 110–260 SFM (35–80 m/min)

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