Seco 02959971 Turning Insert SNMG431-M3 TP2501 Carbide

Product Description

The SECO 02959971 is a square SNMG-series indexable turning insert designed for metal cutting operations on CNC lathes and turning centers. It carries the TP2501 manufacturer grade with a CVD-applied Duratomic multilayer coating — TiCN, Al2O3, and Cr — engineered for extended tool life in steel and stainless steel applications. The insert features a 0.5 inch inscribed circle, a 3/16 inch thickness, and a 1/64 inch corner radius. The M3 chip breaker geometry with a chamfered and honed cutting edge style provides stable chip control across a range of depths. Eight available cutting edges and compatibility with clamp, pin, and lever lock holding methods make this insert a versatile choice for high-production turning environments.

This insert is rated primarily for steel (ISO P) and secondarily for stainless steel (ISO M) and cast iron (ISO K). It is suited for boring, facing, and turning operations in both roughing and semi-finishing passes, covering material grades P10 through P35. The 90-degree lead angle and negative rake geometry deliver strong edge support during interrupted or continuous cuts. Licensed machinists and CNC operators in job shops, aerospace component shops, and general metalworking facilities will encounter this insert as a direct catalog replacement or standard tooling item. It conforms to both ANSI and ISO standards and carries the ISO code SNMG120404-M3.

Key Features

• CVD Duratomic multilayer coating: TiCN, Al2O3, and Cr for wear and heat resistance
• 8 usable cutting edges per insert for reduced tooling cost per edge
• M3 chip breaker geometry with chamfered and honed edge for consistent chip control
• Compatible with clamp, pin, and lever lock insert holding methods
• Maximum depth of cut: 0.4843 inches
• Multi-use application: boring, facing, and turning

Compatibility

Designed as a replacement or standard-stock SNMG431-M3 insert for toolholders conforming to ANSI and ISO SNMG120404 seat specifications. Compatible with turning operations on steel, stainless steel, and cast iron workpiece materials as noted in ISO P, M, and K material classifications.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified clamp hardware for the toolholder style — clamp, pin, or lever lock — to ensure proper insert seating. Inspect the insert pocket and seating surfaces for chips or debris before installing a new edge.