Kennametal 5697921 CNMG431MN KCP10B Turning Insert

Product Description

The KENNAMETAL 5697921 is a solid carbide turning insert designated CNMG431MN in the ANSI system (ISO: CNMG120404MN), carrying the KCP10B grade and a multilayer CVD coating of TiCN, Al2O3, and TiOCN. The insert features an 80-degree diamond (rhombic) shape, a neutral hand orientation, and a negative rake and relief angle geometry. The MN chip breaker is optimized for roughing and medium machining operations. With four usable cutting edges and a chamfered, honed cutting edge style, this insert is engineered for consistent performance and cost efficiency in high-volume turning applications. It weighs 0.0208 pounds.

This insert is intended for turning, facing, and boring of steel and cast iron workpieces, corresponding to ISO material groups P and N. The KCP10B grade delivers high wear resistance against steel (P) and moderate wear resistance with toughness against aluminum and non-ferrous materials (N). It is suited for both light and heavier interrupted cuts in production environments where consistent tool life and surface finish repeatability are required. Licensed HVAC, plumbing, and general machining shops running lathes or turning centers in job-shop and production settings will find this insert a direct fit for standard external and internal turning toolholders in the KENLOC series. The insert is compatible with both clamp and pin holding methods.

Key Features

• Multilayer CVD coating (TiCN, Al2O3, TiOCN) for high wear resistance on steel and cast iron
• 80-degree diamond (rhombic) insert shape with four cutting edges for extended tool life per insert
• MN chip breaker geometry supports roughing and medium machining chip control
• Negative rake and negative side clearance for stable, secure seating in CNMG toolholders
• Compatible with clamp and pin insert holding methods
• Meets ANSI and ISO standards; ANSI code CNMG431, ISO code CNMG120404

Compatibility

Designed as a direct-fit replacement for CNMG431MN (ANSI) and CNMG120404MN (ISO) grade seats in KENLOC-series turning toolholders and compatible CNMG negative-rake toolholder bodies using clamp or pin retention. Multi-use application covering turning, facing, and boring operations.

Installation Notes

This insert is installed by a machinist or toolroom technician into a compatible CNMG negative-rake toolholder. Power down and lock out the machine spindle before changing inserts. Use the appropriate torque wrench and clamp screw specified by the toolholder manufacturer to seat the insert securely — do not over-torque the clamp screw. Inspect the insert pocket for chips or debris before seating a new insert to ensure proper contact and runout.