Kennametal 1114823 Grooving Insert KC850 Carbide Top Notch

Product Description

The KENNAMETAL 1114823 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and turning operations on CNC lathes and turning centers. It carries the NR4125K designation with Kennametal grade KC850, a CVD-coated carbide grade featuring a multilayer TiC, TiCN, and TiN finish for wear resistance and extended tool life. The insert provides a 0.25-inch (6.35 mm) cutting width with a matching maximum depth of cut of 0.25 inches (6.35 mm) and a full-radius corner geometry with a corner radius of approximately 0.125 inches (3.18 mm). Positive rake geometry and a K-style chip breaker support controlled chip evacuation in grooving applications.

This insert is suited for external grooving, profiling, and parting applications on production turning equipment. The right-hand configuration and NR insert style make it compatible with Top Notch toolholders designed for that insert seat size 4 platform. It is appropriate for machining steels and cast irons within material grades C5 and C6, covering a depth-of-cut range of 0.20 to 0.30 inches (5.00 to 10.00 mm). Machinists and CNC operators in production shops and tool cribs are the primary users.

Key Features

• Solid carbide construction with CVD-applied TiC, TiCN, and TiN multilayer coating for wear and heat resistance
• 0.25-inch (6.35 mm) cutting width and 0.25-inch (6.35 mm) maximum depth of cut
• Full-radius corner geometry with 0.125-inch (3.18 mm) corner radius and 55-degree included angle
• Positive rake angle (10 degrees) with K-style chip breaker for chip control in grooving operations
• Top Notch series, insert seat size 4, right-hand orientation
• KC850 grade targets C5 and C6 material classifications, suitable for steels and cast irons

Compatibility

Designed for use with Top Notch series toolholders accepting an NR-style insert at seat size 4. Refer to the Kennametal Top Notch toolholder catalog to confirm holder compatibility before ordering.

Installation Notes

Insert seating and clamping should be performed by a qualified machinist or CNC tooling technician following the toolholder manufacturer's torque specifications for the clamping screw. Ensure the insert pocket and clamping surfaces are clean and free of chips before seating the insert. Machine spindle must be fully stopped and the control placed in an appropriate safe state before changing inserts. Do not exceed the rated depth-of-cut range for this insert geometry.