Sandvik Coromant 7860979 WNMG332-PM 4425 Turning Insert

Product Description

The SANDVIK COROMANT 7860979 is a WNMG332-PM 4425 grade solid carbide turning insert designed for external turning operations on CNC lathes and turning centers. Part of the T-Max P series, it features a trigon (80-degree included angle) insert shape with a neutral hand orientation and a 3/8-inch inscribed circle. The CVD-applied multilayer coating stack -- Al2O3, TiN, and TiCN -- delivers thermal resistance and wear protection suited to interrupted and continuous cuts. The PM chip breaker geometry is engineered for positive chip control across a broad feed and depth-of-cut range, making this insert a practical choice for production turning environments.

This insert is primarily rated for steel (ISO P) and cast iron (ISO K) workpiece materials, covering the most common turning applications in general machining, automotive component work, and job-shop production. It seats in toolholders that accept WNMG-style inserts secured by clamp or screw holding methods. The clearance code N (0-degree relief angle) and tolerance code M identify the seating geometry. Six cutting edges per insert reduce per-edge tooling cost in high-volume operations. The ISO designation WNMG 06 04 08-PM 4425 cross-references directly to catalog number WNMG 332-PM for procurement and toolholder compatibility verification.

Key Features

• T-Max P series, grade 4425 -- CVD multilayer coating (Al2O3, TiN, TiCN) for extended tool life on steel and cast iron
• 80-degree trigon insert shape (W) with neutral hand -- fits standard WNMG toolholder pockets
• PM chip breaker geometry for reliable chip control across variable feeds and depths
• Six usable cutting edges per insert for cost-efficient indexing
• 3/8-inch (0.3750 inch) inscribed circle with 1/32-inch (0.0313 inch) corner radius
• Compatible with clamp and screw insert holding methods

Compatibility

Designed for use in WNMG-style turning insert pockets with clamp or screw holding methods. ISO code WNMG 06 04 08-PM 4425 should be used to verify toolholder and insert seat compatibility. Primary workpiece materials are steel (ISO P) and cast iron (ISO K).

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified fastener for the insert screw or clamp to avoid insert movement or seat damage during cutting. Inspect the insert pocket and seating surface for chips or debris before seating a new insert edge.