Kennametal 5641363 CNMA543 KCK20B Carbide Turning Insert

Product Description

The KENNAMETAL 5641363 is a solid carbide turning insert in the CNMA543 geometry, designed for precision material removal on CNC lathes and turning centers. It carries a multilayer CVD coating of TiCN, Al2O3, and TiOCN applied via MTCVD process, which builds wear resistance and thermal stability across a broad range of cutting conditions. The insert measures 16.12 mm in length with a 5/8-inch inscribed circle and a 3/64-inch corner radius. It features a negative rake angle, zero-degree clearance (code N), and a honed cutting edge style with a flat-top chip breaker. Four usable cutting edges are available per insert, making it a cost-effective choice for high-production turning applications.

This insert is rated for primary use on steel and cast iron workpieces, corresponding to ISO material groups P and K. It is suited for turning, facing, and boring operations in both roughing and semi-finishing contexts where CVD-coated carbide offers a performance advantage. The KENLOC series designation indicates compatibility with the KENNAMETAL KENLOC toolholder system, which uses a clamp-and-pin holding method. This insert is typically specified by machining engineers and CNC operators working in job shops, production machining facilities, and aerospace or automotive component manufacturing environments.

Key Features

• Multilayer CVD coating: TiCN, Al2O3, TiOCN for enhanced wear and crater resistance
• 80-degree diamond insert shape with negative rake for strength and edge stability
• Four cutting edges per insert for extended tool life value
• Honed cutting edge style reduces microchipping on interrupted cuts
• Clamp and pin holding method provides rigid, repeatable seating in KENLOC toolholders
• Rated for turning, facing, and boring on steel and cast iron

Compatibility

Designed for use in KENNAMETAL KENLOC series toolholders that accept CNMA-style inserts with a clamp-and-pin holding method. Conforms to ANSI and ISO standards; ISO code CNMA160612, industry standard number CNMA543. Suitable for steel (ISO P) and cast iron (ISO K) workpiece materials in material grades C2 and C3.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician with the machine spindle fully stopped and the machine locked out per facility safety procedures. Seat the insert fully into the pocket before tightening the clamp to ensure proper registration against the locating surfaces. Inspect the insert seat and clamp for chips or debris before each index. Follow the toolholder manufacturer torque guidelines for the clamp screw; do not overtighten, as this can fracture the carbide substrate.