DNMA 150404 Grade FM524 / DNMA 431 #FMCarbide

DNMA 150404 / DNMA 431, grade FM524 — negative 55° rhombic turning insert.

1/2" inscribed circle, 3/16" thick, 1/64" corner radius. FM524 is a CVD grade — gray cast iron and very stable steel — the hardest substrate with CVD coating for extreme wear resistance.

Specifications

• Insert designation (ISO): DNMA 150404
• Insert designation (inch): DNMA 431
• Insert shape: 55° rhombic (D)
• Clearance angle: 0° — negative (N)
• Tolerance class: M
• Insert type: A — with hole, no chipbreaker
• Inscribed circle (I.C.): 1/2" (12.7 mm)
• Thickness: 3/16" (4.76 mm)
• Corner radius: 1/64" (0.4 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

Get more from your turning inserts.

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

Understand turning-insert designations and what the letters and numbers mean.

Read the guide → 03 / CUTTING PARAMETERS

Turning calculations

Learn how to use a turning formula calculator to work through the numbers.

Explore the formulas →