Kennametal 4109906 Grooving Insert NR3031K KCU25 Carbide

Product Description

The KENNAMETAL 4109906 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 an AlTiN (aluminum titanium nitride) coating applied via PVD process, which provides elevated heat resistance and extended tool life in demanding cut conditions. The insert is left-hand orientation with a 1.58 mm cutting width and a maximum depth of cut of 2.39 mm. The full-radius geometry and KCU25 grade make it well suited for finishing and light profiling work in a range of workpiece materials. Installation requires a compatible Top Notch clamp-style toolholder.

This insert is intended for precision grooving applications in metalworking environments, including production turning on steel, cast iron, and similar materials where the KCU25 carbide grade and AlTiN coating deliver reliable performance. The NR insert style with a 55-degree included angle and 0.79 mm corner radius supports consistent chip control via the K chip breaker. It is used in shop environments by machinist and CNC technicians performing tight-tolerance groove, face groove, and profile operations. The metric insert size designation is 3031, with a cutting height of 8.74 mm.

Key Features

• Solid carbide construction with PVD-applied AlTiN coating for heat and wear resistance
• 1.58 mm cutting width with a full-radius geometry for consistent groove profiles
• Maximum depth of cut of 2.39 mm; depth of cut range 2.00 to 3.00 mm
• K chip breaker for controlled chip evacuation in grooving operations
• Left-hand insert orientation; clamp-style holding method
• KCU25 manufacturer grade, material grade C2 and C6

Compatibility

Designed for use in Top Notch series clamp-style grooving toolholders that accept the NR3031 insert size. Verify toolholder compatibility with the NR insert style and 3031 insert size designation before installation.

Installation Notes

This insert is installed by a qualified machinist or CNC technician using the appropriate Top Notch clamp and torx or hex key as specified by the toolholder manufacturer. Power down and lock out the machine before changing inserts. Inspect the toolholder seat and clamp for wear or debris before seating the new insert. Do not use a damaged or deformed insert seat, as this affects cutting accuracy and insert retention.