Kyocera TWE04420 Carbide Turning Insert CNMG431AH KW10

Product Description

The KYOCERA TWE04420 is a carbide turning insert with an 80-degree diamond shape (CNMG style) and KW10 manufacturer grade. It features a tungsten carbide-cobalt (WC-Co) substrate with a honed cutting edge and AH chip breaker geometry. The insert carries a neutral hand orientation, a 0.5-inch inscribed circle, and a corner radius of 0.0156 inches (1/64 inch). With four available cutting edges and a negative rake angle of -9 degrees, this insert is suited for high-productivity turning, boring, facing, chamfering, and internal facing operations. It is installed and changed by machinists and CNC operators in production and job-shop environments.

The TWE04420 is designed for primary use on non-ferrous metals and superalloys (ISO material codes N and S), with secondary suitability for cast iron (ISO code K). Typical applications include external turning, boring, chamfering, facing, and internal facing on CNC lathes and turning centers. The CNMG431AH designation conforms to both ANSI and ISO standards, making it compatible with standard CNMG-style toolholders that accept a 431 insert size. The ISO code for this insert is CNMG120404AH.

Key Features

• 80-degree diamond insert shape (Shape Code C) with AH chip breaker for controlled chip flow on non-ferrous and superalloy workpieces
• KW10 grade carbide (WC-Co substrate) optimized for ISO material groups N and S, with secondary capability in K (cast iron)
• Four cutting edges per insert for extended tool life and lower cost-per-edge
• Negative rake angle (-9 degrees) and honed cutting edge for stable, consistent cuts
• Clamp and pin insert holding method compatible with standard CNMG toolholder pockets
• Conforms to ANSI and ISO standards; ISO designation CNMG120404AH

Compatibility

Designed for use in standard CNMG-style toolholders accepting a 431 insert size with clamp and pin holding. Conforms to ANSI and ISO specifications for CNMG turning inserts. ISO industry standard number: CNMG431AHKW10.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC operator with the machine powered down and the spindle fully stopped. Ensure the toolholder pocket and clamp surfaces are clean and free of chips before seating the insert. Use the appropriate torx or clamp screw driver as specified by the toolholder manufacturer — do not overtighten. Inspect the new cutting edge for chips or damage before resuming cuts.