Kennametal 5591711 CPMT2152MF Carbide Turning Insert

Product Description

The KENNAMETAL 5591711 is a solid carbide turning insert designed for precision metal cutting in CNC and manual lathe operations. It carries the ANSI insert code CPMT2152MF and grade designation KCM25B, with a multilayer CVD coating consisting of TiCN, Al2O3, and TiOCN applied via MTCVD process. The 80-degree diamond (rhombic) shape provides a strong cutting geometry suited to finishing and medium machining passes. With a 0.25-inch inscribed circle, a 0.0313-inch corner radius, and a positive rake and side clearance geometry, this insert delivers controlled chip formation and surface finish on steel, stainless steel, superalloys, and titanium workpieces. Licensed machinists, CNC programmers, and toolroom techs specify this insert for turning, facing, and boring applications.

This insert is targeted at production and job-shop environments where steel (P-group) and stainless steel (M-group) are primary workpiece materials. The KCM25B grade balances high toughness for steel with moderate wear resistance for stainless, making it a practical choice across a range of material conditions. The MF chip breaker geometry supports finishing and medium-depth passes with a maximum depth of cut of 0.0845 inches. It mounts via screw-on (screw-in) holding method, compatible with CPMT-style toolholders. The neutral hand orientation suits straight turning and facing tool paths without requiring a dedicated left- or right-hand holder.

Key Features

• ANSI code CPMT2152MF, ISO code CPMT060208 for global toolholder compatibility
• KCM25B grade with multilayer CVD TiCN / Al2O3 / TiOCN coating for toughness and wear resistance
• 80-degree diamond insert shape with chamfered and honed cutting edge for controlled entry and edge strength
• MF chip breaker optimized for finishing and medium machining on steel and stainless steel
• Positive rake and positive side clearance geometry reduces cutting forces
• Screw-on holding method with 0.1102-inch hole diameter for positive insert seating
• 2 cutting edges per insert; neutral hand for flexible toolholder use

Compatibility

Designed as a direct-fit replacement for CPMT2152MF-style screw-on turning insert seats. Verified compatible with toolholders conforming to ANSI and ISO CPMT insert standards. Suitable for turning, facing, and boring operations on steel, stainless steel, superalloys, and titanium workpieces.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Disengage machine power and confirm the spindle is fully stopped before indexing or replacing inserts. Use the manufacturer-specified torque wrench for the insert clamping screw to avoid over-torquing the screw or cracking the carbide substrate. Inspect the insert pocket and seating surface for chips or debris before seating a new insert.