Kennametal 4109780 Grooving Insert KCU25 Left Hand Altin

Product Description

The KENNAMETAL 4109780 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and turning operations on CNC lathes and turning centers. It carries a KCU25 manufacturer grade with a PVD-applied AlTiN coating, delivering elevated hardness and thermal resistance for improved tool life in demanding cuts. The insert provides a cutting width of 0.25 inches (6.35 mm) and a maximum depth of cut of 0.25 inches (6.35 mm). The K chip breaker geometry promotes controlled chip evacuation in grooving applications. Installation and replacement are handled by machining professionals running precision turning operations.

This insert is suited for grooving operations in metalworking environments where left-hand cutting orientation is required. The Top Notch series is a recognized insert platform used on compatible Top Notch toolholders for external grooving. The KCU25 grade with AlTiN finish is appropriate for a range of workpiece materials including steels and cast irons where PVD-coated carbide inserts are specified. The clamp-style insert holding method provides secure seating during aggressive grooving passes.

Key Features

• Solid carbide construction with PVD AlTiN coating for wear and heat resistance
• Left-hand cutting orientation for specific toolholder and machine setups
• Cutting width of 0.25 inches (6.35 mm) with maximum depth of cut of 0.25 inches (6.35 mm)
• K chip breaker geometry for controlled chip formation during grooving
• Corner radius of 0.0225 inches (0.57 mm) for defined groove edge geometry
• Clamp-style insert holding for rigid, repeatable positioning in the toolholder

Compatibility

Designed for use in Top Notch series toolholders that accept size 4 insert seats with NG-style inserts. Consult the toolholder documentation to confirm left-hand insert orientation compatibility before installation.

Installation Notes

This insert is installed and replaced by qualified machinists or CNC tooling technicians. Power down and lock out the machine before changing inserts. Use the appropriate torque wrench and clamp screw as specified by the toolholder manufacturer — do not overtighten the clamp. Inspect the insert seat and clamp for wear or debris before seating the new insert to ensure proper contact and rigidity.