Kennametal 3755492 Turning Insert DPMT3251LF KCK20 Carbide

Product Description

The KENNAMETAL 3755492 is a solid carbide turning insert with ANSI designation DPMT3251LF and ISO designation DPMT11T304, coated with a multilayer PVD AlTiN/AlCrN coating for high wear resistance. It features a 55-degree diamond (rhombic) shape, a positive rake angle of 5 degrees, and a positive side clearance. The insert carries grade KCK20 with an LF chip breaker geometry optimized for finishing and light machining operations. With an inscribed circle of 0.375 inches, a corner radius of 0.0156 inches, and a cutting edge style of honed, this insert is suited to precision material removal in steel and cast iron applications. Installation is performed by a licensed machinist or tooling technician using the screw-on holding method.

This insert is designed for turning, facing, boring, back turning, and back boring operations on steel and cast iron workpiece materials. Its KCK20 grade delivers high wear resistance on steel (P classification) and high to moderate wear resistance with toughness on cast iron (K classification). The LF chip breaker geometry targets finishing and light machining passes where tight tolerances and consistent surface finish are the primary objectives. The neutral hand orientation makes it adaptable across a range of DPMT-compatible toolholders.

Key Features

• Multilayer PVD AlTiN/AlCrN coating for high wear resistance in steel and cast iron
• LF chip breaker geometry optimized for finishing and light machining cuts
• 55-degree diamond insert shape with positive rake and positive side clearance
• Maximum depth of cut of 0.0492 inches (1.25 mm) for controlled finishing passes
• Screw-on holding method for secure, repeatable insert indexing
• 2 cutting edges per insert; neutral hand orientation
• Conforms to ANSI and ISO insert standards

Compatibility

Designed for use in DPMT-style screw-on toolholders compatible with ANSI insert code DPMT3251 and ISO insert code DPMT11T304. Suitable for primary workpiece materials classified as steel (P) and cast iron (K). Verified compatible with turning, facing, boring, back turning, and back boring applications.

Installation Notes

This insert is installed and indexed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing inserts. Use the correct torque wrench and screw size specified by the toolholder manufacturer to seat the screw-on insert properly - over-tightening can fracture the carbide insert body. Inspect the pocket and clamping screw for wear or damage before seating a new insert.