Kennametal 3769107 CPMT3251FP KCM15 Turning Insert

Product Description

The KENNAMETAL 3769107 is a solid carbide turning insert with ANSI designation CPMT3251FP and ISO designation CPMT09T304, finished in a multilayer MTCVD TiCN and Al2O3 coating under grade KCM15. The insert features an 80-degree diamond (rhombic) shape, a positive rake angle of 15 degrees, and a honed cutting edge for reliable finishing operations. With a 3/8-inch inscribed circle and a 1/64-inch corner radius, this insert is engineered for light, precise cuts on steel, stainless steel, and superalloys. It provides 2 cutting edges and is held in place via a screw-on mounting method.

This insert is suited for finishing-pass applications including turning, facing, and boring on CNC lathes and manual turning centers in both production and job-shop environments. The KCM15 grade is characterized by moderate wear-resistance and toughness for steel (P-class) and high to moderate wear-resistance for stainless steel (M-class), making it a practical choice for machinists working across a range of ferrous and difficult-to-machine materials. Licensed machinists and CNC operators in industrial manufacturing and precision machining shops are the typical end users.

Key Features

• CPMT3251FP insert style with 80-degree diamond shape and positive side clearance for reduced cutting forces
• KCM15 grade with multilayer MTCVD TiCN and Al2O3 coating for extended tool life on steel and stainless steel
• FP chip breaker geometry optimized for finishing operations
• Honed cutting edge style for consistent surface finish and edge stability
• Screw-on (CPMT) insert holding method for positive seating and repeatable indexing
• Neutral hand orientation supports use in standard right-hand and left-hand toolholders

Compatibility

Designed as a screw-on replacement insert for CPMT-style toolholders conforming to ANSI and ISO standards. Compatible toolholders must accept an ANSI CPMT3251 or ISO CPMT09T304 insert with a 0.1732-inch (4.40 mm) hole diameter and a 5/32-inch insert thickness.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate Torx or hex key to seat the clamping screw firmly without over-torquing the insert. Inspect the insert pocket and seating surfaces for chips or debris before installing a new edge to ensure proper seating and dimensional accuracy.