Kennametal 5640973 CNMG431UP KCM15B Turning Insert

Product Description

The KENNAMETAL 5640973 is a CNMG431UP turning insert in grade KCM15B, designed for high-productivity metal cutting on CNC lathes and turning centers. The insert features a multilayer MTCVD coating of TiCN and Al2O3, combining moderate-to-high wear resistance with sufficient toughness for demanding applications. The 80-degree diamond (rhombic) shape provides a strong cutting geometry, while the UP chip breaker geometry is optimized for roughing and medium machining operations. Negative rake and negative side clearance deliver stable, predictable cutting action in steel and stainless steel. Licensed machinists and CNC operators working in job shops or production environments install this insert type routinely.

This insert is suited for turning, facing, and boring operations on steel (ISO P), stainless steel (ISO M), and superalloys and titanium workpiece materials. The KCM15B grade targets applications requiring a balance of wear resistance and toughness — particularly useful on interrupted cuts or variable-condition workpieces. The KENLOC series clamp-and-pin holding method is standard for this insert style. The 4-cutting-edge configuration maximizes tool economy per insert.

Key Features

• Multilayer MTCVD coating: TiCN and Al2O3 for wear resistance on steel and stainless steel
• 80-degree diamond (rhombic) insert shape with negative rake angle of 15 degrees for strong edge stability
• UP chip breaker geometry rated for roughing and medium machining
• 4 usable cutting edges per insert for extended tool economy
• Compatible with clamp and pin insert holding methods (KENLOC series)
• Conforms to ANSI insert code CNMG431 and ISO insert code CNMG120404

Compatibility

Designed as an OEM-style replacement for KENLOC series toolholders accepting CNMG431 (ANSI) or CNMG120404 (ISO) negative-rake turning inserts with clamp and pin holding. Industry Standard Number CNMG431UP. ISO Code CNMG120404UP.

Installation Notes

Installation is performed by qualified CNC machinists or tool-room technicians. Before indexing or replacing inserts, the machine spindle must be fully stopped and all motion arrested per lockout/tagout procedures. Seat the insert firmly against the toolholder pocket locating surfaces before tightening the clamp to prevent micro-movement during cuts. Inspect the insert pocket for chips, wear, or burrs prior to seating each new cutting edge.