Kennametal 1870999 Turning Insert DPMT3251LF KC5010

Product Description

The KENNAMETAL 1870999 is a solid carbide turning insert with ANSI designation DPMT3251LF and ISO designation DPMT11T304, finished with a PVD-applied TiAlN coating and graded KC5010. The insert features a 55-degree diamond (rhombic) shape, a positive rake geometry, and a neutral hand orientation. It measures 11.63 mm (0.9156 inches) in length with a 3/8-inch inscribed circle and a 1/64-inch corner radius. The LF chip breaker geometry targets finishing and light machining operations. Licensed HVAC techs and machinists working in precision turning environments will find this insert suited for controlled, high-wear-resistance applications across steel and stainless steel workpieces.

This insert is intended for CNC turning, facing, boring, back turning, and back boring operations. Primary workpiece materials include steel, stainless steel, and superalloys and titanium, with secondary suitability for non-ferrous materials. The KC5010 grade delivers high wear resistance to moderate wear resistance and toughness across steel (P), stainless steel (M), and cast iron (K) material groups. The screw-on holding method provides secure, repeatable seating in compatible DPMT-style toolholders used in production and job-shop turning environments.

Key Features

• PVD TiAlN coating for high wear resistance in steel and stainless steel cutting
• 55-degree diamond insert shape with positive rake and positive side clearance for reduced cutting forces
• LF chip breaker geometry optimized for finishing and light machining passes
• Screw-on insert holding method for rigid, repeatable clamping
• Two cutting edges per insert for extended tool life and lower cost per edge
• Honed cutting edge style for improved edge stability at light depths of cut
• Maximum depth of cut of 1.25 mm (0.0492 inches) at finishing parameters

Compatibility

Designed as an OEM-style screw-on turning insert for DPMT-style toolholders conforming to ANSI and ISO standards. No specific toolholder model numbers were provided in the product data.

Installation Notes

This insert is installed and changed by machinists or tool crib technicians on CNC or manual turning centers. Power down the spindle and engage the machine lock before indexing or replacing inserts. Use the correct Torx or hex key driver specified by the toolholder manufacturer to seat the clamping screw — do not overtighten. Inspect the toolholder pocket and screw for wear or damage before seating a new insert.