Kennametal 4050677 Turning Insert CNMG431FF KCU10 Carbide

Product Description

The KENNAMETAL 4050677 is a CNMG431FF turning insert in grade KCU10, designed for precision finish turning on CNC lathes and turning centers. The insert features a solid carbide substrate with a PVD-applied TiAlN coating, delivering high wear resistance across a range of workpiece materials. The 80-degree diamond (rhombic) shape provides a strong cutting edge geometry, while the FF chip breaker is optimized for finishing operations. With a 0.5-inch inscribed circle and a 1/64-inch corner radius, this insert suits tight-tolerance finishing passes where surface finish and dimensional control are critical. CNC machinists and tool crib technicians in production and job shop environments are the primary users.

This insert is suited for finish turning, facing, and boring operations on steel, stainless steel, cast iron, superalloys, and titanium, making it a versatile option across the P, M, K, N, S, and H ISO material groups. The negative rake, negative side clearance geometry is compatible with KENLOC-style toolholders that accept CNMG-style inserts using clamp and pin holding methods. Typical applications include finishing passes on turned components where consistent chip control and extended tool life are required. The four available cutting edges help reduce per-edge tooling cost in high-production environments.

Key Features

• PVD TiAlN coating provides high wear resistance on steel, stainless steel, and cast iron
• FF chip breaker geometry engineered for finishing operations with controlled chip evacuation
• 80-degree diamond insert shape delivers a strong included angle for stable cutting
• Four cutting edges per insert extend usable tool life and reduce per-edge cost
• Neutral hand orientation fits left-hand, right-hand, and axial toolholder setups
• Compatible with clamp and pin holding methods per ANSI and ISO standards

Compatibility

Designed for use in KENLOC-style and CNMG-compatible toolholders that accept CNMG431 (ISO CNMG120404) inserts using clamp and pin clamping. Conforms to ANSI and ISO insert standards. Suitable for turning, facing, and boring on steel, stainless steel, cast iron, superalloys, titanium, and aluminum workpieces per ISO material groups P, M, K, N, S, and H.

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully in the pocket and verify the clamp and pin are engaged and torqued per the toolholder manufacturer specifications before resuming cuts. Inspect the insert pocket and seating surfaces for chips or wear that could affect insert stability before each installation.