Seco 03062791 Turning Insert DNMG431-M3 TK1501 Carbide

Product Description

The SECO 03062791 is a solid carbide turning insert in the DNMG-M3 series, designed for precision turning operations on CNC lathes and turning centers. It carries the industry-standard code DNMG431-M3 (ISO: DNMG150404-M3) and features a CVD-applied Duratomic multilayer coating of TiCN, Al2O3, and Cr for high wear resistance. The 55-degree diamond (D-shape) geometry with a negative rake and neutral hand provides four usable cutting edges per insert. An inscribed circle of 0.5 inches and a corner radius of 0.0157 inches (1/64 inch) make it well suited for finishing and medium machining passes. Machinists and CNC operators working in job shops and production environments will find this insert in high-volume steel and cast iron applications.

This insert targets external and internal turning operations including facing, boring, back turning, and standard OD turning. Its grade characteristics are optimized for steel (P), stainless steel (M), and cast iron (K) workpiece materials, ranging from high wear resistance to moderate toughness across those material groups. The M3 chip breaker geometry supports both finishing and medium machining operations, making it adaptable across varying depth-of-cut requirements in a single setup. Compatible holding methods include clamp, pin, and lever lock toolholders designed for DNMG-style inserts.

Key Features

• CVD Duratomic multilayer coating (TiCN, Al2O3, Cr) for extended tool life in steel and cast iron
• 55-degree diamond insert shape with negative rake and neutral hand for versatile toolholder compatibility
• Four usable cutting edges per insert, reducing per-edge tooling cost
• M3 chip breaker supports finishing and medium machining operations
• Maximum depth of cut of 0.5945 inches accommodates a wide range of turning passes
• Complies with both ANSI and ISO insert standards (DNMG431 and DNMG150404)

Compatibility

Designed for use in DNMG-style toolholders that accept clamp, pin, or lever lock holding methods. Compatible with toolholders spec'd for a 0.5-inch inscribed circle DNMG insert. Suitable for primary workpiece materials coded P (steel), M (stainless steel), and K (cast iron) per ISO material classification.

Installation Notes

Insert seating and clamping should be performed with the machine fully stopped and in a locked-out, de-energized state per shop lockout/tagout procedures. Inspect the insert pocket and shim for wear or debris before seating a new insert, as a contaminated pocket will cause premature edge failure. Use the toolholder manufacturer's recommended clamping torque procedure for DNMG lever lock, pin, or clamp-style holders. Verify insert orientation and hand designation against the toolholder spec sheet before engaging the first cut.