Kennametal 4171823 CNMG4305FN KCU10 Turning Insert

Product Description

The KENNAMETAL 4171823 is a CNMG-style indexable turning insert in grade KCU10 with a PVD-applied TiAlN coating. It features an 80-degree diamond insert shape, a 0.5-inch inscribed circle, and a corner radius of 0.0079 inches. The FN chip breaker geometry is designed for controlled chip formation during finishing and medium-duty turning operations. With four cutting edges and a neutral hand orientation, it delivers consistent performance across turning, facing, and boring applications. The carbide substrate paired with TiAlN coating provides thermal and wear resistance suited to demanding materials. Licensed machinists and CNC turning center operators install this insert in KENLOC-compatible toolholders as part of production and repair operations.

This insert is engineered for use on steel, stainless steel, superalloys, and titanium workpiece materials, corresponding to ISO material codes P, M, and S. Typical applications include external turning, facing passes, and boring operations on CNC lathes and turning centers in both production and job-shop environments. The honed cutting edge style and negative rake geometry make it well-suited for interrupted cuts and work-hardened materials where edge stability is critical. It is classified under ISO code CNMG120402FN and meets both ANSI and ISO insert standards.

Key Features

• KCU10 carbide grade with PVD TiAlN coating for elevated thermal resistance and extended tool life
• FN chip breaker geometry optimized for finishing and medium cuts on steel and stainless steel
• 80-degree diamond insert shape with negative rake provides a strong cutting edge for interrupted and continuous cuts
• Four usable cutting edges per insert to maximize cost-per-edge efficiency
• Honed cutting edge style reduces micro-chipping on difficult-to-machine superalloys and titanium
• Compatible with clamp and pin insert-holding methods for flexible toolholder use
• Multi-use geometry supports turning, facing, and boring without changing insert style

Compatibility

Designed as an OEM-specification replacement insert conforming to ANSI and ISO standard CNMG4305FN (ISO CNMG120402FN) geometry, compatible with KENLOC-series toolholders and any CNMG-standard clamp or pin-lock holder accepting a 0.5-inch inscribed circle insert.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine in a stopped, locked-out state before indexing or replacing inserts. Use the correct torque wrench and manufacturer-specified hardware when seating the insert in the toolholder pocket to ensure proper clamping without over-torquing the clamp screw. Inspect the insert pocket and seating surfaces for chips or debris before installing a new edge. Always verify insert orientation and confirm the chip breaker side is positioned correctly before resuming cutting operations.