Kennametal 5591773 CNMG431MN KCP40B Turning Insert

Product Description

The KENNAMETAL 5591773 is a solid carbide turning insert with an ANSI insert code of CNMG431MN and an ISO code of CNMG120404MN. It carries the KCP40B manufacturer grade and uses a multilayer CVD coating of TiN, TiCN, and Al2O3 applied through the MTCVD process. The insert features an 80-degree diamond (rhombic) shape, a neutral hand, and a negative rake and clearance geometry. With 4 cutting edges and a chamfered and honed cutting edge style, it is suited to the demands of roughing and medium machining operations on steel and stainless steel. Licensed machinists and CNC turning specialists install this insert in KENLOC-compatible toolholders.

This insert is designed for turning, facing, and boring operations in both roughing and medium machining applications. Its KCP40B grade is characterized by high toughness against steel workpieces (ISO P classification) and moderate wear resistance with toughness for stainless steel workpieces (ISO M classification). Typical installations involve production turning centers and CNC lathes where consistent chip control and edge durability are required across interrupted and continuous cuts in steel and stainless steel materials.

Key Features

• KCP40B grade with multilayer CVD TiN/TiCN/Al2O3 coating for toughness on steel and stainless steel
• 80-degree diamond (rhombic) insert shape provides a strong cutting edge geometry
• 4 usable cutting edges extend tool life per insert
• MN chip breaker geometry optimized for roughing and medium machining
• Neutral hand orientation fits a wide range of KENLOC toolholder configurations
• Compatible with clamp and pin insert holding methods

Compatibility

Designed as a direct-fit replacement for KENLOC series toolholders accepting CNMG431 geometry inserts. Conforms to both ANSI and ISO standards for CNMG insert specifications.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is stopped and all motion is fully arrested before indexing or replacing inserts. Use the appropriate torque wrench for the clamping screw to avoid seat damage or insert cracking - refer to the toolholder manufacturer specification for the correct fastener torque. Inspect the insert pocket and seating surface for chips or wear before seating the new insert.