Kennametal 4121724 WNMG432MS KCU25 Carbide Turning Insert

Product Description

The KENNAMETAL 4121724 is a WNMG432MS indexable turning insert in manufacturer grade KCU25, designed for high-performance metal cutting on CNC lathes and turning centers. The insert features a solid carbide substrate with a PVD-applied AlTiN coating, an 80-degree trigon shape, and a 0.5 inch inscribed circle. With six cutting edges and a negative rake geometry, the 4121724 delivers consistent performance across turning, facing, and boring operations. The MS chip breaker geometry and honed cutting edge style make it well-suited for interrupted and continuous cuts in demanding workpiece materials.

This insert is engineered for primary use on steel, stainless steel, superalloys, and titanium workpieces, corresponding to ISO material codes P, M, and S. It fits into the KENLOC toolholding system using a clamp and pin holding method, making it a practical choice for production shops running mixed-material turning programs. Typical applications include external diameter turning, facing passes, and light to medium boring operations on manual or CNC lathes.

Key Features

• PVD AlTiN coating for heat resistance and tool life in steel and superalloy cutting
• 80-degree trigon insert shape (W) with six usable cutting edges for cost-effective indexing
• MS chip breaker geometry with honed edge for controlled chip formation
• Negative rake angle of 13 degrees for strong edge support
• Multi-use capability across turning, facing, and boring operations
• Meets ANSI and ISO standards; ISO code WNMG080408MS

Compatibility

Designed for use with KENLOC toolholders that accept WNMG432 style inserts with a clamp and pin holding method. Compatible with toolholders requiring a 0.2031 inch hole diameter and a neutral hand insert orientation.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully against the pocket walls before tightening the clamp to ensure proper edge engagement. Inspect the insert pocket and shim for wear or debris before seating a new insert.