Kennametal 4109882 Grooving Insert NP3012K KCU25 Carbide

Product Description

The KENNAMETAL 4109882 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and turning operations on CNC lathes and turning centers. Designated style NP3012K with grade KCU25 and a physical vapor deposition (PVD) AlTiN coating, this insert delivers a 4.83 mm cutting width and a maximum depth of cut of 5.08 mm. The positive rake geometry and K chip breaker promote efficient chip evacuation in a range of grooving applications. Machinists and CNC operators install this insert using a clamp-style holder compatible with the Top Notch tooling system.

This insert is suited for grooving operations in both production and job-shop turning environments. The right-hand orientation and 45-degree lead angle make it appropriate for standard external groove profiles. The KCU25 carbide grade with AlTiN coating is commonly applied to steel, stainless steel, and similar materials where wear resistance and thermal stability are priorities. The Top Notch series is a well-established platform used across a broad range of turning centers requiring repeatable insert indexing and secure clamping.

Key Features

• Solid carbide construction with PVD AlTiN coating for extended tool life in demanding grooving cuts
• 4.83 mm cutting width with a maximum depth of cut range of 5.00 mm to 10.00 mm
• Positive rake geometry with K chip breaker for effective chip control
• Right-hand insert orientation with 45-degree lead angle
• 0.34 mm corner radius for controlled groove profile
• Clamp-style insert holding method compatible with Top Notch series toolholders

Compatibility

Designed for use with Top Notch series clamp-style grooving toolholders. Compatible with holders and systems specified for NP-style inserts in the Top Notch platform.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secure before seating or replacing the insert. Use the appropriate torque wrench on the clamping screw as specified by the toolholder manufacturer. Verify insert seating and alignment before resuming cutting operations.