Sandvik Coromant 5966261 Turning Insert WNMG432SMR 2025

Product Description

The SANDVIK COROMANT 5966261 is a WNMG432SMR 2025 grade indexable turning insert from the T-Max P series, designed for external and internal turning operations on CNC lathes and turning centers. The insert features a multilayer CVD coating of TiCN, Al2O3, and TiN applied via MTCVD process, which provides wear resistance and thermal protection during metal removal. With a trigon (80-degree included angle) shape, a 0.5-inch inscribed circle, and a 1/32-inch corner radius, this insert is engineered primarily for machining stainless steel. The SMR chip breaker geometry aids in chip control during moderate to high feed-rate turning passes. Licensed machinists and CNC operators install this insert as part of routine tooling changes.

This insert is suited for turning stainless steel workpieces, corresponding to ISO material group M. It fits into WNMG-style toolholders that accept a 0.5-inch inscribed circle insert with a neutral hand orientation. The T-Max P series is intended for general external turning with clamp and pin insert-holding methods. A maximum depth of cut of 3.20 mm (0.126 inch) applies under typical operating conditions. This insert is appropriate for both production shop environments and job shops running stainless or similar ISO M-group materials on standard CNC turning equipment.

Key Features

• MTCVD multilayer coating: TiCN, Al2O3, and TiN for thermal and wear resistance
• Trigon shape with 80-degree included angle and WNMG insert style for versatile turning
• SMR chip breaker geometry for controlled chip formation at moderate to high feeds
• Neutral insert hand — compatible with neutral-hand WNMG toolholders
• 6 usable cutting edges per insert for extended tooling economy
• Clamp and pin holding method for secure seating in the toolholder pocket

Compatibility

Designed for use in WNMG-style turning toolholders accepting a 0.5-inch inscribed circle insert with neutral hand orientation and a hole diameter of 0.2032 inch. ISO code WNMG080408SMR2025. Insert size code 432. Confirm toolholder pocket specifications before installation.

Installation Notes

Insert changes are performed by licensed machinists or CNC operators with the machine spindle stopped and all axes at a safe position. Index or replace the insert using the appropriate torx or hex key per the toolholder manufacturer's specification for the clamping screw. Inspect the toolholder pocket seat for chips or wear before seating the new insert. Verify insert orientation and seating before resuming cutting operations.