Sumitomo 19P7APF Carbide Turning Insert WNMG431 AC8025P

Product Description

The SUMITOMO 19P7APF is a WNMG431 carbide turning insert with an AC8025P CVD-coated grade designed for steel and cast iron machining applications. Carrying an ANSI insert code of WNMG431 and ISO code WNMG080404, this insert features an 80-degree trigon shape, a 0.5 inch inscribed circle, and a corner radius of 0.0156 inches. The ESU chip breaker geometry is optimized for finishing and light machining operations. Negative rake and negative side clearance geometry suit it to clamp and pin style toolholders. The AC8025P grade balances high wear resistance with moderate toughness, making it effective on a range of steel and cast iron workpieces.

This insert is intended for CNC lathe and turning center operations in production and job shop environments. It is suited to finishing and light roughing passes on carbon steel, alloy steel, and cast iron components. The neutral hand orientation allows use in both left-hand and right-hand applications. Machinists and CNC turning specialists working in ISO P and K material categories will find this insert a practical fit for tight-tolerance finishing work where consistent edge life is required.

Key Features

• AC8025P CVD-coated carbide grade with high wear resistance for steel (P) and moderate wear resistance and toughness for cast iron (K)
• ESU chip breaker geometry engineered for finishing and light machining operations
• 80-degree trigon (W) insert shape with negative rake and negative side clearance for rigid, stable cutting
• 0.5 inch inscribed circle and 0.1875 inch insert thickness for consistent tool life in standard WNMG toolholders
• Compatible with clamp and pin insert holding methods
• Meets ANSI and ISO 13399 standards; ISO code WNMG080404N-SU

Compatibility

Designed as an OEM-style replacement carbide turning insert for WNMG431 format toolholders accepting negative-rake W-shape inserts with clamp or pin retention. Consult your toolholder documentation to confirm bore diameter and seating requirements before installation.

Installation Notes

Insert installation should be performed by a qualified machinist or CNC tooling technician with the machine in a full stop and lockout-tagout procedures followed. Ensure the insert pocket and seating surfaces are clean and free of debris before seating the insert. Use the appropriate torque wrench and clamp screw specified by the toolholder manufacturer — do not overtighten, as carbide inserts are brittle and can fracture under excessive clamping force. Inspect the cutting edge for chips or wear before each use and index or replace as needed.