Kennametal 1113763 Grooving Insert KC850 Carbide Top Notch

Product Description

The KENNAMETAL 1113763 is a solid carbide grooving insert in the Top Notch series, designed for precision external grooving and turning operations on CNC lathes and turning centers. The insert carries a CVD-applied multilayer coating of TiC, TiCN, and TiN, which provides wear resistance and thermal stability across a range of workpiece materials. It features a 3.18 mm cutting width, a maximum depth of cut of 6.35 mm, and a positive rake angle of 10 degrees. The right-hand orientation and K-style chip breaker geometry make this insert suited for controlled chip flow during grooving passes. It is installed by machinists and CNC tool setup technicians in production and job shop environments.

This insert is intended for use in grooving, parting, and profiling applications on turning equipment. The KC850 grade with CVD coating is commonly applied to steel and cast iron workpieces, covering material grades C5 and C6. The Top Notch series toolholder system is required for proper seating and clamping. The insert size designation is 3125, and the included angle is 55 degrees, making it compatible with Top Notch-style grooving toolholders designed for that insert profile. The MSC and manufacturer cross-reference number for this insert is NFD3125R/LK.

Key Features

• Solid carbide substrate with CVD multilayer TiC, TiCN, and TiN coating for thermal and abrasion resistance
• 3.18 mm cutting width with a maximum depth of cut of 6.35 mm
• Positive rake angle of 10 degrees with K-style chip breaker for controlled chip evacuation
• Corner radius of 0.19 mm for fine-feature grooving and reduced stress concentration at groove base
• Right-hand insert orientation; Top Notch series toolholder required
• Material grades C5 and C6 coverage; lead angle of 3 degrees

Compatibility

Designed for use in Top Notch series grooving toolholders. Cross-reference manufacturer number NFD3125R/LK. Verify toolholder compatibility with the insert size designation 3125 and the 55-degree included angle before installation.

Installation Notes

This insert is installed by machinists and CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the correct Top Notch clamping screw and torque to toolholder manufacturer specification only — do not use substitute hardware. Inspect the toolholder pocket and clamping mechanism for wear or debris before seating the new insert to ensure proper support and prevent premature edge failure.