Kennametal 5641360 CNMA432 KCK20B Carbide Turning Insert

Product Description

The KENNAMETAL 5641360 is a solid carbide turning insert in the CNMA432 geometry, designed for demanding metal-cutting applications on CNC lathes and manual turning centers. Graded KCK20B and finished with a multilayer MTCVD coating sequence of TiCN, Al2O3, and TiOCN, this insert delivers wear resistance and thermal stability when cutting steel and cast iron. The 80-degree diamond shape provides a strong cutting edge geometry, and the honed cutting edge style promotes consistent, repeatable surface finishes. Four usable cutting edges maximize tool life per insert. It is sized at 0.5077 inches in length with a 0.5-inch inscribed circle and a 1/32-inch corner radius.

This insert is suited for turning, facing, and boring operations in production and job-shop environments. It is commonly used on ferrous workpieces classified under ISO material groups P (steel) and K (cast iron), making it a practical choice for general-purpose lathe work across both roughing and finishing passes within its rated depth-of-cut range. The flat-top chip breaker geometry and negative rake angle make it especially effective on interrupted cuts and tough steel alloys where edge security is a priority. Licensed machinists and CNC operators in metalworking trades are the primary installers and users.

Key Features

• KCK20B grade with multilayer CVD coating: TiCN base, Al2O3 mid-layer, TiOCN outer layer for high wear and heat resistance
• CNMA432 geometry with 80-degree diamond shape and negative rake for strong, secure cutting edge
• Four cutting edges per insert for extended tool economy
• Maximum depth of cut of 0.1691 inches suits both roughing and semi-finishing passes
• Compatible with clamp and pin holding methods in KENLOC-style toolholders
• Multi-use application: turning, facing, and boring from a single insert geometry

Compatibility

Designed for use in KENLOC-series toolholders that accept CNMA432 inserts with clamp and pin holding. Industry standard number CNMA432 and ISO code CNMA120408 apply. Conforms to ANSI and ISO insert standards. Material grade classifications C2 and C3 apply.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or indexing inserts. Ensure the insert pocket and seating surfaces are clean and free of chips before clamping to prevent microfracture at the cutting edge. Torque clamping hardware to toolholder manufacturer specifications and verify insert seating visually before resuming cuts.