Kennametal 1620372 Profiling Insert NPGR51 KT315 Cermet

Product Description

The KENNAMETAL 1620372 is a cermet-grade profiling and turning insert in the Top Notch series, designed for precision material removal on steel and stainless steel workpieces. It carries the NPGR51 style designation and manufacturer grade KT315, a PVD-coated cermet with TiN and TiCN coating layers suited for finishing and semi-finishing operations. The insert has a parallelogram shape with a 55-degree included angle, a positive rake geometry at 10 degrees, and an 8-degree relief angle. With 2 cutting edges and a right-hand orientation, it is a standard choice for CNC turning centers and profiling applications where consistent edge integrity is required.

This insert is intended for profiling and turning operations on steel and stainless steel, corresponding to ISO material codes P and M. The KT315 cermet grade performs well in light to medium cutting conditions where surface finish and dimensional accuracy are priorities. It fits Top Notch series toolholders that accept NPGR51 geometry inserts. The insert is typically used in production turning environments by machining professionals and tool-and-die technicians running CNC lathes and turning centers.

Key Features

• Cermet substrate with PVD-applied TiN and TiCN coating for wear resistance in steel and stainless steel cutting
• Positive rake angle of 10 degrees reduces cutting forces and supports clean surface finishes
• Two cutting edges per insert for extended tool life between changeovers
• Right-hand cut orientation with common chipbreaker geometry
• Parallelogram shape with 55-degree included angle and 8-degree relief angle for profiling clearance
• ISO code KCGR110304R08 for cross-reference with standard toolholder catalogs

Compatibility

Designed for use in Top Notch series toolholders accepting NPGR51R geometry inserts. Compatible standards include NPGR51R and ISO KCGR110304R08. Primary workpiece materials are steel and stainless steel (ISO P and M classifications).

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle before seating or replacing the insert. Secure the insert using the appropriate Top Notch clamp mechanism and verify proper seating before resuming cuts. Do not exceed the recommended depth of cut for the toolholder and insert combination as specified in the toolholder documentation.