Seco 02959956 Turning Insert DNMU332-M3 TP1501 Carbide

Product Description

The SECO 02959956 is a solid carbide turning insert in the DNMU-M3 series, designed for precision metal cutting in demanding production environments. Carrying the TP1501 manufacturer grade, this insert features a multilayer CVD coating — TiCN, Al2O3, and Cr — marketed under the Duratomic coating classification. The diamond 55-degree insert shape with a negative rake and chamfered and honed cutting edge delivers controlled material removal across a range of operations. With four cutting edges and a 1/32-inch corner radius, it provides consistent performance and cost-effective edge utilization. Licensed machinists and CNC operators working in turning centers and lathes are the primary end users.

This insert is suited for back turning, boring, facing, and general turning applications on steel and cast iron workpieces. It is rated for primary workpiece material code P (steel), with secondary ratings for code K (cast iron) and code H (hard materials), making it a practical choice for job shops and production machining cells running mixed material programs. The M3 chip breaker geometry supports medium cutting conditions. The insert conforms to both ANSI and ISO standards, with an ISO designation of DNMU110408-M3 and an industry standard number of DNMU332-M3.

Key Features

• Multilayer CVD Duratomic coating (TiCN, Al2O3, Cr) for extended tool life on steel and cast iron
• Four cutting edges per insert for maximum indexing value
• Diamond 55-degree shape with negative rake and N clearance code for stable, controlled cutting
• M3 chip breaker geometry suited to medium turning, facing, boring, and back turning
• Chamfered and honed cutting edge style reduces chipping on interrupted cuts
• Compatible with clamp, pin, and lever lock insert holding methods

Compatibility

Designed for use in toolholders accepting DNMU-style inserts with clamp, pin, or lever lock holding methods. Conforms to ANSI and ISO standards; cross-reference ISO code DNMU110408-M3 and industry standard number DNMU332-M3 when verifying toolholder fit. Intended for turning centers and lathes cutting steel, cast iron, and hard materials.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully and evenly in the toolholder pocket before tightening the clamping mechanism to avoid micro-fractures at the cutting edge. Inspect the insert pocket and clamping hardware for wear or debris before each insert change.