Kennametal 1870990 Turning Insert CPMT181505LF KC5010

Product Description

The KENNAMETAL 1870990 is a CPMT181505LF solid carbide turning insert with KC5010 grade and a PVD-applied TiAlN coating. This 80-degree diamond-shaped insert is designed for external turning operations in CNC and manual lathes. It features a screw-on holding method, a neutral hand orientation, and a positive rake geometry. The inscribed circle measures 0.2188 inches, the corner radius is 0.0079 inches, and the insert delivers a maximum depth of cut of 0.0492 inches. With two cutting edges per insert, the 1870990 is suited for steel, stainless steel, superalloys, and titanium machining applications. Licensed machinists and CNC operators typically specify this insert for precision finish and semi-finish turning work.

This insert is intended for turning centers and lathes performing finish to semi-finish cuts on steel, stainless steel, superalloys, and titanium workpieces. Its LF chipbreaker geometry is engineered for light to moderate feed rates where chip control and surface finish quality are priorities. The KC5010 grade with TiAlN coating provides thermal resistance and wear performance in demanding materials. This insert fits into CPMT-style screw-on toolholders and is appropriate for both production shop environments and job shop applications where multiple workpiece materials are encountered across shifts.

Key Features

• CPMT181505LF insert style with 80-degree diamond shape and 11-degree relief angle
• KC5010 grade solid carbide with PVD TiAlN coating for wear and heat resistance
• LF chipbreaker geometry optimized for light to moderate feed finishing passes
• Positive rake angle of 5 degrees reduces cutting forces on difficult materials
• Two cutting edges per insert extend usable tool life per unit
• Screw-on holding method provides secure, repeatable insert indexing

Compatibility

Designed for use in CPMT-style screw-on turning toolholders. Primary workpiece material compatibility includes steel, stainless steel, superalloys, and titanium. Meets ANSI and ISO insert standards for CPMT geometry.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct Torx or hex key specified by the toolholder manufacturer to seat the clamping screw — do not overtighten. Inspect the toolholder pocket for wear or debris before seating the new insert to ensure proper support and geometry alignment.