Kennametal 2425779 Turning Insert CPMT18151LF KC5025 Carbide

Product Description

The KENNAMETAL 2425779 is a solid carbide turning insert in the CPMT18151LF geometry, offered in the KC5025 manufacturer grade with a PVD-applied TiAlN coating. This insert is designed for screw-on toolholders and features an 80-degree diamond shape with a neutral hand orientation and a positive rake angle of 5 degrees. The inscribed circle measures 7/32 inches (0.2188 inches), the corner radius is 1/64 inches (0.0156 inches), and the insert length is 5.65 mm. With two cutting edges and an 11-degree relief angle, the 2425779 is built for precision turning in demanding material categories. Licensed HVAC and metalworking professionals will recognize this as a high-performance insert for difficult-to-machine materials.

This insert is engineered primarily for turning stainless steel, superalloys, and titanium - material categories coded M and S. It is well-suited for finishing and semi-finishing operations where edge integrity and coating durability are critical. The LF chipbreaker geometry is optimized for controlled chip flow at moderate depths of cut, with a maximum depth of cut of 1.25 mm (0.0492 inches). The screw-on holding method ensures secure insert seating in compatible toolholders used in CNC turning centers and manual lathes across production and job-shop environments.

Key Features

• KC5025 grade with PVD TiAlN coating for high-heat and wear resistance in M and S material groups
• CPMT insert style with 80-degree diamond shape and neutral hand for versatile turning setups
• LF chipbreaker geometry promotes controlled chip evacuation during finishing cuts
• Positive rake angle (5 degrees) reduces cutting forces on difficult-to-machine alloys
• Two cutting edges per insert for extended tool life per unit
• Screw-on mounting method provides rigid, repeatable insert positioning

Compatibility

Designed as an OEM-style replacement insert for screw-on CPMT-style toolholders conforming to ANSI and ISO standards. Specific toolholder compatibility should be verified against the CPMT18151 insert seat specification.

Installation Notes

Insert replacement should be performed by a qualified machinist or toolroom technician with the machine in a powered-down, locked-out state per LOTO procedures. Use the appropriate Torx or hex key torque driver specified by the toolholder manufacturer to secure the clamping screw - do not overtighten. Inspect the insert pocket and seating surface for chips or wear before seating a new insert. Handle carbide inserts with care to avoid chipping the cutting edge prior to use.