Kennametal 4176073 Grooving Insert NG4189 KCU10 Solid Carbide

Product Description

The KENNAMETAL 4176073 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and turning operations on CNC lathes and turning centers. Manufactured to grade KCU10 with a PVD-applied AlTiN coating, this insert delivers wear resistance and thermal stability in demanding interrupted-cut and continuous-cut applications. The left-hand configuration and NG4189 insert style provide a cutting width of 0.189 inches (4.80 mm) and a maximum depth of cut of 0.250 inches (6.35 mm). It is installed and maintained by machinist and toolroom professionals working with carbide tooling systems in metalworking environments.

This insert is suited for grooving, parting, and profiling operations in both production and job-shop turning environments. The double-end geometry extends usable tool life before replacement. With a material grade rating of C3 and C4, it is appropriate for cutting ferrous and non-ferrous workpiece materials across a range of hardness levels. The clamp-style insert holding method secures the insert firmly in compatible Top Notch toolholders, maintaining repeatability across high-volume runs.

Key Features

• Solid carbide construction, grade KCU10, for high rigidity and edge stability
• PVD AlTiN coating improves heat and oxidation resistance during high-speed grooving
• Left-hand cutting orientation, NG insert style, 55-degree included angle
• Cutting width of 0.189 inches (4.80 mm) with a corner radius of 0.0225 inches (0.57 mm)
• Maximum depth of cut 0.250 inches (6.35 mm); effective range 0.200 to 0.300 inches (5.00 to 10.00 mm)
• Double-end insert design extends service intervals
• Clamp-style holding method compatible with Top Notch seat size 4 toolholders

Compatibility

Designed for use with Top Notch series, seat size 4 clamp-style toolholders accepting NG-style inserts. The manufacturer cross-reference number for this insert is NG4189R/L.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Disengage spindle drive and verify the machine is in a safe, locked-out state before seating or removing inserts. Use the appropriate clamp screw torque driver recommended by the toolholder manufacturer to avoid seat damage or insert microcracking. Inspect the insert seat and clamping hardware for wear or debris before each insert change.