Kennametal 3781279 Grooving Insert KCU10 3mm Carbide

Product Description

The KENNAMETAL 3781279 is a solid carbide grooving insert designed for precision external grooving operations on CNC lathes and turning centers. Built to the A4 series standard, it features a 3.00 mm cutting width and a maximum depth of cut of 2.90 mm, making it well-suited for shallow to medium-depth groove applications. The insert carries a KCU10 grade designation with an AlTiN coating applied via PVD process, providing thermal resistance and wear protection during high-speed cutting. The neutral hand orientation and positive rake geometry support clean chip evacuation. Machinists and CNC operators working in job shops or production environments install this insert into compatible A4-style grooving toolholders.

This insert is intended for grooving operations on metalworking lathes and turning centers where tight groove tolerances and consistent finish are required. The GUP chip breaker geometry is designed to control chip flow in grooving cuts on steel and similar materials. The A4 series sizing targets applications within the 2.00 mm to 3.00 mm depth-of-cut range. It is typically used by machinists performing OD grooving, undercut, and snap-ring groove work in precision component manufacturing.

Key Features

• 3.00 mm cutting width with a maximum depth of cut of 2.90 mm
• KCU10 solid carbide grade with PVD-applied AlTiN coating for wear and heat resistance
• GUP chip breaker geometry for controlled chip evacuation in grooving cuts
• Positive rake angle supports reduced cutting forces
• Corner radius of 0.40 mm (0.0157 inches) for controlled groove profile
• Neutral hand orientation for flexible toolholder application

Compatibility

Designed for use with A4-series grooving toolholders that accept the A4G insert style. Confirm toolholder seat dimensions and insert size designation 0300 before installation.

Installation Notes

Installation is performed by qualified machinists or CNC setup personnel. Power down and lock out the machine spindle before seating or removing inserts. Use a torque wrench or insert clamp tool appropriate for the toolholder manufacturer specifications to secure the insert without overtightening the clamping screw. Inspect the insert seat and clamping surfaces for debris or damage before each insert change.