Kennametal 1850070 Profiling Insert NPGR51 KC5025

Product Description

The KENNAMETAL 1850070 is a solid carbide profiling and turning insert in the Top Notch series, designed for precision grooving and profiling operations on CNC lathes and turning centers. It carries the NPGR51 style designation with a KC5025 ultra-fine grain carbide grade and an AlTiN PVD coating that provides thermal resistance and extended tool life. The insert is left-hand orientation, features a parallelogram shape with a 55-degree included angle, and delivers a 0.0156-inch corner radius with a positive rake geometry. Licensed machinists and CNC operators install this insert into compatible Top Notch clamp-style toolholders for profiling, contouring, and turning passes.

This insert is suited for production and job-shop turning applications across a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. The PVD AlTiN coating and ultra-fine grain carbide substrate make it a capable choice for both light finishing and moderate roughing passes in profiling operations. The two cutting edges and clamp-style holding method support consistent edge indexing in high-throughput turning environments. It is packaged individually and sold in minimum order quantities of 5.

Key Features

• KC5025 ultra-fine grain carbide grade with AlTiN PVD coating for extended tool life on steel and stainless steel
• Left-hand, positive-rake geometry with 10-degree rake angle and 8-degree relief angle
• 0.0156-inch (0.40 mm) corner radius for controlled profiling and contour work
• Parallelogram shape with 55-degree included angle, 0.375-inch insert length
• Two cutting edges with clamp-style holding for repeatable indexing
• Compatible with workpiece materials coded P, M, K, N, and S per ISO classification

Compatibility

Designed for use in Top Notch series clamp-style toolholders accepting NPGR51L inserts. ISO equivalent designation is KCGR110304L08. Standards references include NPGR51L and KCGR110304L08.

Installation Notes

This insert is installed by qualified CNC machinists or tool-and-die technicians. The machine spindle must be fully stopped and the turret locked before indexing or replacing inserts. Use the appropriate Top Notch clamping screw and torx key as specified by the toolholder manufacturer. Inspect the insert pocket seat for chips or debris before seating the insert to ensure proper clamping force and edge geometry.