Kyocera TMH00402 Turning Insert CPMH321HQ CA025P Carbide

Product Description

The KYOCERA TMH00402 is a solid carbide turning insert designed for precision metal-cutting operations on steel workpieces. It carries grade CA025P with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, providing wear resistance and thermal stability across a broad range of cutting conditions. The insert features an 80-degree diamond shape (shape code C), a 3/8-inch inscribed circle, a 1/64-inch corner radius, and a positive rake angle of 15 degrees with a honed cutting edge. The HQ chip breaker geometry promotes controlled chip flow. Two cutting edges are available per insert, and the insert is held in place by a screw-clamp system. Licensed machinists and CNC operators install this insert in production and job-shop turning applications.

This insert is suited for turning, boring, and internal facing operations on steel. It is classified under material grades P10, P20, P30, and P40, making it applicable across a range of steel types from low-carbon to alloy steels. The neutral hand orientation and CPMH style geometry allow it to fit standard CPMH-compatible toolholders. Maximum depth of cut is 0.059 inches. The insert conforms to both ANSI and ISO standards, with ISO code CPMH090304HQ and industry standard number CPMH321HQCA025P.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life on steel
• 80-degree diamond insert shape with positive 15-degree rake angle for efficient chip removal
• HQ chip breaker geometry for controlled chip formation during boring and internal facing
• Honed cutting edge style reduces micro-chipping at the edge
• Two usable cutting edges per insert to reduce per-edge tooling cost
• Screw-clamp holding method ensures secure, repeatable seating in compatible toolholders

Compatibility

Designed for use in CPMH-style screw-clamp toolholders conforming to ANSI and ISO standards. Compatible with boring and internal facing applications on steel workpieces in the P10 through P40 material grade range.

Installation Notes

Installation is performed by machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or indexing the insert. Use the correct torx or hex key specified by the toolholder manufacturer when tightening the clamp screw — do not overtighten. Inspect the insert pocket for chips or debris before seating to ensure proper contact and runout.