Kennametal 3751620 CPMT3252MW KCP25 Turning Insert

Product Description

The KENNAMETAL 3751620 is a solid carbide turning insert with ANSI designation CPMT3252MW and ISO designation CPMT09T308, coated with a multilayer TiCN and Al2O3 CVD coating under the KCP25 grade. The 80-degree diamond (rhombic) shape provides a positive rake angle and 11-degree relief angle, contributing to stable cutting performance during turning, facing, and boring operations. The MW chip breaker is engineered for medium machining applications with a wiper edge geometry that improves surface finish at standard feed rates. At 9.67 mm in length and 0.375 inches inscribed circle, this insert fits screw-on toolholders and delivers two usable cutting edges per insert. Installation and application are handled by machinists and CNC turning center operators in production and job shop environments.

This insert is suited for turning steel and cast iron workpieces in both residential shop and industrial production settings. The KCP25 grade provides moderate wear resistance combined with toughness, making it appropriate for general-purpose steel (P) and aluminum and non-ferrous (N) material groups. The positive side clearance and chamfered, honed cutting edge style reduce cutting forces and edge chipping during interrupted or continuous cuts. Typical applications include external and internal turning, facing passes, and light boring where consistent surface finish and tool life predictability are priorities.

Key Features

• KCP25 grade with multilayer TiCN and Al2O3 CVD coating for moderate wear resistance and toughness across P and N material groups
• MW wiper chip breaker optimized for medium machining with improved surface finish at standard feed rates
• 80-degree diamond insert shape with positive rake and 11-degree relief angle for reduced cutting forces
• Two cutting edges per insert with chamfered and honed edge prep for edge stability
• Screw-on insert holding method compatible with standard CPMT-style toolholders
• Maximum depth of cut of 1.25 mm (0.0492 inches) suited for finishing and semi-finishing passes

Compatibility

Designed for use in screw-on CPMT-style turning toolholders conforming to ANSI and ISO standards for the CPMT3252 (ISO 09T308) insert seat size. Compatible with turning, facing, and boring operations on steel, cast iron, aluminum, and non-ferrous workpiece materials per grade classification P and N.

Installation Notes

Insert seating and replacement is performed by a machinist or toolroom technician. Always index or replace inserts with the machine spindle stopped and the machine in a locked-out, zero-energy state per applicable shop safety procedures. Use the correct screw torque driver specified by the toolholder manufacturer to avoid cracking the carbide insert or stripping the clamp screw. Inspect the toolholder pocket for chips or damage before seating a new insert to ensure proper contact and repeatability.