Kennametal 3744956 CCMT432MP KCK20 Turning Insert

Product Description

The KENNAMETAL 3744956 is a solid carbide turning insert in the CCMT432MP geometry, grade KCK20, designed for screw-on toolholders. It features an 80-degree diamond (rhombic) shape with a positive rake angle of 12 degrees and a 7-degree relief angle, making it well-suited for efficient chip control in steel and cast iron applications. The insert measures 12.9 mm (0.5077 inches) in length with a 0.5 inch inscribed circle and a 1/32 inch (0.0313 inch) corner radius. A multilayer PVD coating combining AlTiN and AlCrN delivers high wear resistance across a range of cutting conditions. This insert is installed by CNC machinists and tooling technicians in production turning environments.

This insert is rated for roughing and medium machining operations in steel (ISO P) and cast iron (ISO K) workpiece materials. Its MP chip breaker geometry supports consistent chip breaking across both material classes. Typical applications include turning, facing, and boring operations on CNC lathes and turning centers. The neutral hand orientation and positive side clearance make it adaptable to a broad range of screw-on toolholder setups. The insert carries dual standards compliance under both ANSI (CCMT432) and ISO (CCMT120408) designations.

Key Features

• 80-degree diamond insert shape (ANSI code CCMT432 / ISO CCMT120408) for strong cutting edge geometry
• KCK20 grade with multilayer PVD AlTiN and AlCrN coating for high wear resistance in steel and cast iron
• MP chip breaker optimized for roughing and medium machining operations
• Positive rake (12 degrees) and positive side clearance reduce cutting forces
• 2 cutting edges with honed cutting edge style for consistent tool life
• Screw-on holding method compatible with standard CCMT-style toolholders

Compatibility

Designed for use in screw-on CCMT toolholders conforming to ANSI CCMT432 and ISO CCMT120408 standards. Suitable for turning, facing, and boring of steel and cast iron workpieces. Compliant with both ANSI and ISO insert specifications.

Installation Notes

Installation is performed by qualified CNC machinists or tooling technicians. Power down and lock out the machine spindle before seating or removing the insert. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer's specified procedure. Inspect the insert pocket and seating surface for debris or damage before installing a new insert to ensure proper seating and edge engagement.