Seco 02959842 Turning Insert WNMG432-MF2 TP2501 Carbide

Product Description

The SECO 02959842 is a WNMG432-MF2 indexable turning insert in grade TP2501, designed for negative-rake external and internal machining operations. The insert is manufactured from carbide substrate and coated via CVD with a multilayer TiCN, Al2O3, and Cr Duratomic coating system. It features a trigon (W) shape with an 80-degree included angle, a 0.5-inch inscribed circle, a 0.0315-inch corner radius, and an MF2 chip breaker geometry optimized for finishing and medium cuts. Six cutting edges are available per insert, making it an efficient multi-tipped option for high-volume CNC turning environments. Machinists and toolroom operators working on steel applications install this insert in compatible WNMG-style toolholders.

This insert is engineered primarily for machining steel (ISO P), with secondary suitability for stainless steel (ISO M) and cast iron (ISO K), covering material grades P10, P20, P30, and P35. Typical applications include turning, facing, and boring operations on CNC lathes and turning centers in both production and job-shop environments. The chamfered and honed cutting edge style supports stable cutting action across light-to-medium depths of cut, making it well suited for semi-finish and finish passes on steel components where surface integrity and tool life are priorities.

Key Features

• TP2501 grade with Duratomic CVD multilayer TiCN, Al2O3, and Cr coating for extended wear resistance on steel
• MF2 chip breaker geometry optimized for finishing and medium-depth turning, facing, and boring
• Six usable cutting edges per insert for low cost-per-edge in high-volume production
• Chamfered and honed edge preparation reduces cutting forces and supports stable engagement
• Compatible with clamp, pin, and lever-lock insert holding methods for flexible toolholder pairing
• Meets ANSI and ISO standards; ISO code WNMG080408-MF2

Compatibility

Designed as an OEM-style replacement or direct-fit insert for WNMG-series negative-rake toolholders that accept a 432 insert size (0.5-inch inscribed circle, 3/16-inch thickness) with clamp, pin, or lever-lock holding methods. Primary workpiece material is steel; secondary workpiece materials include stainless steel and cast iron.

Installation Notes

Installation is performed by machinists or toolroom technicians on CNC lathes and turning centers. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torque wrench and manufacturer-specified clamping hardware to seat the insert securely in the pocket; do not use impact tools on clamping screws. Inspect the toolholder pocket for wear or debris before seating a new insert to ensure proper support and edge positioning.