Kennametal 1161282 Turning Insert CNMP431 KC850 Carbide

Product Description

The KENNAMETAL 1161282 is a solid carbide turning insert in the CNMP431 geometry, designed for metal cutting operations on CNC lathes and machining centers. It carries a multilayer CVD coating of TiC, TiCN, and TiN under the KC850 grade designation, which provides a balance of moderate wear resistance and toughness across a broad range of workpiece materials. The insert measures 12.9 mm (0.5077 inches) in length with a 0.5 inch inscribed circle and a 1/64 inch (0.0156 inch) corner radius. With four available cutting edges and a negative rake geometry, it delivers consistent performance in turning, facing, and boring applications.

This insert is suited for medium machining operations in both residential shop and industrial production environments. The KC850 grade targets steel and stainless steel as primary workpiece materials, with cast iron and special or super alloys as secondary applications. It fits the KENLOC toolholder series and is retained by clamp or pin holding methods. The ANSI insert code is CNMP431 and the ISO equivalent is CNMP120404, making cross-referencing straightforward for machinists sourcing by either standard.

Key Features

• KC850 grade with multilayer CVD TiC, TiCN, and TiN coating for moderate wear resistance and toughness
• 80-degree diamond (rhombic) insert shape for versatile turning, facing, and boring use
• Four cutting edges per insert, reducing per-edge tooling cost
• Negative rake and negative side clearance (clearance code N, tolerance code M)
• Maximum depth of cut: 1.25 mm (0.0492 inches)
• Compatible with clamp and pin insert holding methods

Compatibility

Designed for use in KENLOC series toolholders accepting CNMP431 geometry inserts. Compatible holding methods include clamp and pin styles. Suitable for steel, stainless steel, cast iron, and special or super alloy workpieces per material codes P, M, K, and S.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Before indexing or replacing inserts, ensure the machine is powered down and spindle rotation has fully stopped. Seat the insert firmly in the pocket and verify clamp or pin engagement before returning the tool to service. Follow the toolholder manufacturer torque guidance for clamp screws to avoid insert movement or pocket damage.