DNMG 150408 Chip Breaker BC Grade FM524 / DNMG 432 BC #FMCarbide

DNMG 150408 / DNMG 432, chip breaker BC, grade FM524 — negative 55° rhombic turning insert.

1/2" inscribed circle, 3/16" thick, 1/32" corner radius. The BC breaker is the medium roughing & 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. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.

Specifications

• Insert designation (ISO): DNMG 150408
• Insert designation (inch): DNMG 432
• 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: 3/16" (4.76 mm)
• Corner radius: 1/32" (0.79 mm)
• Chip breaker: BC — Steel — medium roughing & cast iron
• Feed rate range: 0.008–0.020 ipr (0.2–0.5 mm/rev)
• Depth of cut range: 0.06–0.16" (1.5–4 mm)
• Grade: FM524
• Coating: CVD
• ISO application range: P01–P10 · K10–K25
• Cutting speed, non-alloy steel: 720–1570 SFM (220–480 m/min)
• Cutting speed, low-alloy steel: 720–1380 SFM (220–420 m/min)
• Cutting speed, grey cast iron: 560–1380 SFM (170–420 m/min)
• Cutting speed, nodular cast iron: 390–1340 SFM (120–410 m/min)

Tool holders that accept this insert

34 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.

RMC square-shank toolholders — made in the USA

Boring bars and interchangeable heads. 78 more RMC tools take the same insert for internal turning. See RMC boring bars →

TURNING KNOW-HOW

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Practical guides to choosing, understanding and using your inserts.

01 / SELECTION

Grades & chip breakers

Explore the grade and chip-breaker selection chart for your turning operation.

Explore the chart → 02 / INSERT CODES

Know your insert

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Read the guide → 03 / CUTTING PARAMETERS

Turning calculations

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