Kennametal 4109880 Grooving Insert NP2012K KCU25 Carbide

Product Description

The KENNAMETAL 4109880 is a solid carbide grooving insert designed for precise external grooving and parting operations on CNC lathes and turning centers. It carries the KCU25 manufacturer grade with a PVD-applied AlTiN coating, delivering hardness and heat resistance suited for interrupted cuts and demanding workpiece materials. The insert features a 3.68 mm (0.1449 inch) cutting width and a maximum depth of cut of 2.79 mm (0.1098 inch), making it appropriate for light to medium grooving passes. Machinists and tooling technicians working in production turning environments will recognize this as a Top Notch series insert using a clamp-style holding method for secure seating in compatible toolholders.

This insert is configured for right-hand cutting with a positive rake geometry and a K-style chip breaker, which promotes effective chip control during grooving cycles. The 45-degree lead angle and 55-degree included angle suit finish grooving applications where chip evacuation and surface integrity are priorities. It fits turning applications in job shops and production facilities running metric-dimensioned tooling systems. The NP2012 insert size designation identifies the correct toolholder pocket for proper seating and alignment.

Key Features

• Solid carbide construction with PVD AlTiN coating for extended tool life in abrasive and heat-intensive cuts
• 3.68 mm cutting width and 2.79 mm maximum depth of cut for controlled grooving passes
• Right-hand orientation with positive rake and K chip breaker for reliable chip control
• Clamp-style insert holding method for rigid, repeatable seating in Top Notch series toolholders
• 0.34 mm corner radius (0.0135 inch) for defined groove geometry and reduced stress concentration
• KCU25 grade rated for a material grade range of C2 to C6 workpiece applications

Compatibility

Designed for use with Top Notch series clamping toolholders that accept NP2012 insert size pockets. The manufacturer cross-reference number for this insert is NP2012RK.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician with the machine powered down and the spindle locked before changing inserts. Use the appropriate torque wrench and clamp screw per the toolholder manufacturer's documentation - do not overtighten the clamp, as this can fracture the carbide body. Inspect the insert pocket and clamp for chips or debris before seating the insert, and verify correct orientation (right-hand) relative to the programmed tool path before resuming cuts.