Kennametal 4109933 Grooving Insert NRD4062 KCU25 Solid Carbide

Product Description

The KENNAMETAL 4109933 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and parting operations on CNC lathes and turning centers. It carries a KCU25 manufacturer grade with a PVD-applied AlTiN coating for heat and wear resistance in demanding cutting conditions. The insert has a left-hand orientation, a cutting width of 0.125 inches (3.18 mm), and a maximum depth of cut of 0.250 inches (6.35 mm). A full-radius cutting edge with a corner radius of 0.063 inches (1.59 mm) is standard. The insert is held by a clamp-style holder compatible with the Top Notch tooling system.

This insert is suited for grooving, undercutting, and profiling operations in metalworking applications across general machining shops and production turning environments. The KCU25 grade with AlTiN finish performs in steel, stainless steel, and cast iron at moderate to high cutting speeds. It is typically installed by machinists and CNC operators in job shop or production settings where consistent groove geometry and repeatability are required. The left-hand designation applies to specific holder orientations, so confirm hand before ordering.

Key Features

• Solid carbide substrate with PVD AlTiN coating for extended tool life in ferrous materials
• Cutting width of 0.125 inches (3.18 mm) for precise groove sizing
• Maximum depth of cut of 0.250 inches (6.35 mm); depth of cut range 0.200 to 0.300 inches (5.00 to 10.00 mm)
• Full-radius cutting edge with 0.063 inch (1.59 mm) corner radius
• Left-hand insert orientation for corresponding Top Notch clamp holders
• KCU25 grade rated for material grades C2 and C6

Compatibility

Designed for use with Top Notch series clamp-style grooving holders that accept size 4062 inserts. Confirm holder hand orientation and insert seat size 4 compatibility before installation. MSC and manufacturer cross-reference number is NRD4062R/L.

Installation Notes

Installation is performed by a machinist or CNC operator. Power down and lock out the machine before seating or removing any insert. Use the appropriate Top Notch clamp and torque the clamp screw with the manufacturer-specified wrench to ensure the insert is fully seated against the pocket walls. Inspect the insert pocket for chips or debris before each insert change, as contamination can affect seating accuracy and surface finish.