Kennametal 3752144 CNMA643 KCK15 Carbide Turning Insert

Product Description

The KENNAMETAL 3752144 is a CNMA643 solid carbide turning insert in the KENLOC series, designed for high-performance turning, facing, and boring operations. It carries a multilayer CVD coating sequence of TiN, TiCN, and Al2O3 applied via MTCVD process, delivering wear resistance and thermal stability on demanding cuts. The insert features an 80-degree diamond shape, a 3/4-inch inscribed circle, a 3/64-inch corner radius, and a neutral hand orientation. With four cutting edges and a flat-top chip breaker geometry, it suits production environments where tool life and consistency across multiple passes are priorities.

This insert is intended for machining steel and cast iron in turning, facing, and boring applications. The negative rake angle and honed cutting edge style make it appropriate for interrupted cuts and harder workpiece conditions typical in production-floor and job-shop settings. It is installed in KENLOC-compatible toolholders using a clamp-and-pin holding method. Machinists and CNC operators working with ferrous materials will find the CNMA643 geometry and KCK15 grade well suited to moderate-to-heavy roughing depths.

Key Features

• Multilayer CVD coating: TiN, TiCN, and Al2O3 for wear and crater resistance
• 80-degree diamond (CNMA) insert shape with negative rake angle
• Four usable cutting edges for extended tool-life value per insert
• Flat-top chip breaker with honed cutting edge for stable chip control
• Clamp-and-pin holding method compatible with KENLOC toolholder system
• Rated for turning, facing, and boring - multi-use application flexibility

Compatibility

Designed for use in KENLOC-system toolholders accepting CNMA643 insert geometry with clamp-and-pin holding. Primary workpiece materials are steel (P) and cast iron (K); secondary workpiece material code N is also applicable. Conforms to ANSI and ISO insert standards for CNMA-style inserts.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or indexing the insert. Use the correct torque wrench for the clamp screw as specified by the toolholder manufacturer - do not overtighten, as this can crack the carbide substrate. Confirm the insert is fully seated in the pocket before returning the machine to operation, and verify clearance angles match the programmed toolpath geometry.