Accupro 75257071 WNMG431 Carbide Turning Insert

Product Description

The ACCUPRO 75257071 is a WNMG431 (ISO: WNMG080404) indexable carbide turning insert designed for external and internal turning operations on CNC lathes and manual turning centers. Built to grade ACP15K with a CVD coating, it delivers high wear resistance across a range of workpiece materials including steel, stainless steel, and cast iron. The trigon 80-degree W-shape with a neutral hand orientation and negative side clearance provides stable cutting geometry. With 6 usable cutting edges per insert, it extends tool life and reduces per-edge cost in production environments.

This insert is suited for general-purpose turning in job shop and production environments handling steel (P-code), stainless steel (M-code), and cast iron (K-code) workpieces. The WM+ chip breaker geometry supports moderate to high material removal rates while managing chip control across varying feed rates and depths. Maximum depth of cut is 0.1575 inches (4.00 mm), making it appropriate for semi-finishing and medium roughing passes. Machinists and CNC programmers specify this insert for turning toolholders requiring WNMG-style inserts with clamp, lever lock, pin, or screw holding methods.

Key Features

• Grade ACP15K CVD-coated carbide substrate for wear resistance on steel, stainless, and cast iron
• WNMG431 / WNMG080404 geometry with 80-degree included angle and W trigon insert shape
• 6 cutting edges per insert for extended tool life and reduced tooling cost per edge
• WM+ chip breaker for effective chip control in semi-finishing and medium roughing applications
• Compatible with clamp, lever lock, pin, and screw insert-holding methods
• Corner radius of 0.0157 inches (0.40 mm) for controlled surface finish and edge strength

Compatibility

Designed as an OEM-style indexable replacement for toolholders accepting WNMG431 or WNMG080404 style turning inserts with a negative rake seat and 0.2043-inch hole diameter.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully against the pocket locating surfaces and torque the clamping screw or lever to the toolholder specification. Inspect the insert pocket and seating surface for chips or debris before installing a fresh cutting edge.