Kennametal 5090855 VNMG431MS KCU10 Carbide Turning Insert

Product Description

The KENNAMETAL 5090855 is a VNMG431MS KCU10 solid carbide turning insert with a PVD-applied TiAlN coating. It is designed for external and internal turning operations on CNC and manual lathes. The insert features a 35-degree diamond (rhombic) V-shape with a negative rake angle of 13 degrees and a neutral hand orientation. The MS chip breaker geometry targets roughing and medium machining applications. With an inscribed circle of 0.5 inches, a corner radius of 0.0156 inches, and four available cutting edges, this insert delivers high wear resistance across a range of workpiece materials. It belongs to KENNAMETAL's KENLOC series and conforms to both ANSI and ISO standards.

This insert is suited for steel, stainless steel, cast iron, superalloys, titanium, aluminum, and hardened materials - covering ISO material codes P, M, K, N, S, and H. Typical applications include turning, facing, boring, back turning, and back boring in production and job-shop environments. The insert's negative side clearance and clamp-or-pin holding method make it compatible with standard VNMG-style toolholders. It is intended for use by machinists, tool-and-die professionals, and CNC operators in metalworking and manufacturing settings.

Key Features

• PVD TiAlN coating provides high wear resistance and thermal stability across steel, stainless steel, and cast iron
• MS chip breaker geometry optimized for roughing and medium machining operations
• 35-degree V-shape diamond insert with negative rake (13 degrees) for stable cutting action
• Four cutting edges per insert maximize tool life and reduce per-edge cost
• Compatible with clamp and pin holding methods in standard VNMG toolholders
• Conforms to ANSI insert code VNMG431 and ISO insert code VNMG220404

Compatibility

Designed as an OEM-style replacement and standard fit for VNMG431 toolholders conforming to ANSI and ISO VNMG220404 specifications. Suitable for multi-use applications including turning, facing, boring, back turning, and back boring. ISO material grade coverage includes P, M, K, N, S, and H workpiece classifications.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine fully powered down and spindle locked before insert indexing or replacement. Use the appropriate torx or hex key for the clamping screw and ensure the insert seat and pocket are clean and free of chips before seating the insert. Do not exceed the maximum depth of cut for the insert geometry. Follow the toolholder manufacturer's clamping torque specifications and consult applicable shop safety protocols when handling carbide inserts.