Kennametal 3751577 CPMT2151LF KCP25 Turning Insert

Product Description

The KENNAMETAL 3751577 is a solid carbide turning insert designated CPMT2151LF in the KCP25 grade, designed for precision turning, facing, and boring operations on CNC and manual lathes. It features a multilayer CVD coating of TiCN and Al2O3 applied via MTCVD process, delivering moderate wear resistance and toughness suited to steel, cast iron, aluminum, and non-ferrous materials. The insert measures 6.45 mm (0.2539 inches) in length with a 0.25-inch inscribed circle and a 1/64-inch (0.0156-inch) corner radius. The LF chip breaker geometry is optimized for finishing and light machining cuts. Licensed machinists and CNC operators install this insert in screw-on style toolholders.

This insert is suited to finishing and light machining passes on steel and cast iron workpieces, as well as aluminum and non-ferrous materials in both primary material code P and N applications. The 80-degree diamond (rhombic) shape provides good nose strength for general turning and facing passes. The positive rake angle of 5 degrees and positive side clearance support clean chip formation at lighter depths of cut, with a maximum depth of cut of 1.25 mm (0.0492 inches). The neutral hand orientation and screw-on mounting method make it compatible with a wide range of CPMT-style toolholders used in production and job-shop environments.

Key Features

• KCP25 grade with MTCVD multilayer TiCN and Al2O3 coating for wear resistance and toughness on steel and non-ferrous materials
• 80-degree diamond (C-shape) insert geometry with positive rake and positive side clearance for clean, low-force cuts
• LF chip breaker designed for finishing and light machining applications
• 1/64-inch corner radius (0.0156 inches) for tight-tolerance finishing passes
• Screw-on insert holding method with honed cutting edge style for consistent edge integrity
• Two cutting edges per insert; neutral hand suits standard CPMT screw-on toolholders

Compatibility

Designed for use in CPMT-style screw-on turning toolholders conforming to ANSI insert code CPMT2151 and ISO insert code CPMT060204. Suitable for multi-use applications including turning, facing, and boring.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and de-energize the machine before changing inserts. Use the appropriate torx or hex key to seat the clamping screw to the toolholder manufacturer's specification; do not overtighten, as this can crack the insert. Inspect the toolholder pocket and clamping screw for wear or damage before seating a new insert.