Kennametal 5640443 CCMT3251LF Turning Insert KCM15B Carbide

Product Description

The KENNAMETAL 5640443 is a CCMT3251LF screw-on turning insert with a KCM15B manufacturer grade, designed for precision metal removal in demanding machining environments. This solid carbide insert features a multilayer MTCVD TiCN and Al2O3 coating that extends tool life on difficult-to-machine workpiece materials. The 80-degree diamond insert shape with a positive rake angle of 5 degrees and a honed cutting edge style delivers clean, consistent cuts. With 2 cutting edges, an inscribed circle of 0.375 inches, and a corner radius of 0.0156 inches, this insert suits finish and semi-finish turning operations. Licensed machinists, CNC operators, and toolroom technicians install this insert in screw-on toolholders compatible with the CCMT style.

This insert is rated for primary workpiece materials including steel, stainless steel, superalloys, and titanium, aligning with ISO material codes P, M, and S. The LF chip breaker geometry supports low-force cutting and is suited for light finishing passes. Typical applications include turning, facing, and boring on CNC lathes and turning centers in production and job-shop environments. The screw-on holding method provides repeatability and rigidity during indexed edge changes. This insert conforms to ANSI and ISO standards and carries the ISO code CCMT32.51, making it cross-referenceable in standard insert selection charts.

Key Features

• KCM15B grade with multilayer MTCVD TiCN and Al2O3 CVD coating for extended wear resistance
• 80-degree diamond (CCMT) insert shape with positive rake for reduced cutting forces
• LF chip breaker geometry optimized for finishing and light semi-finish passes
• Honed cutting edge style for consistent edge integrity on coated carbide substrate
• 2 cutting edges per insert for cost-effective indexing
• Rated for steel, stainless steel, superalloys, and titanium workpiece materials
• Conforms to ANSI and ISO standards; ISO code CCMT32.51

Compatibility

Designed as an OEM-style screw-on replacement insert for CCMT-style toolholders rated for CCMT3251 inserts. Verified compatible with turning, facing, and boring operations on steel, stainless steel, superalloys, and titanium per ISO material codes P, M, and S.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Power down and de-energize the machine, then engage the spindle lock before indexing or replacing inserts. Use the appropriate torx or hex key for the screw-on clamp screw and do not overtighten, as this can crack the carbide substrate. Inspect the toolholder pocket and seating surface for chips or debris before seating the new insert to ensure proper contact and runout.