Kennametal 4109649 Grooving Insert NF3188 KCU25 Carbide

Product Description

The KENNAMETAL 4109649 is a solid carbide grooving insert in the Top Notch series, designed for precision grooving and parting operations on CNC lathes and turning centers. The insert carries a KCU25 manufacturer grade with a PVD-applied AlTiN coating, delivering heat and wear resistance suited for interrupted cuts and difficult-to-machine materials. It is configured for left-hand cutting with a 4.78 mm cutting width and a maximum depth of cut of 3.81 mm. A 12-degree rake angle and 0.57 mm corner radius contribute to controlled chip formation and edge stability during grooving cycles.

This insert is intended for metal cutting applications in production and job-shop environments. It is suited to external grooving, face grooving, and parting on ferrous and non-ferrous workpieces. Machinists and CNC tooling technicians install it into compatible Top Notch series clamp-style toolholders as a direct component of a qualified insert-and-holder system. The NF insert style and metric insert size 3188 identify the specific seat geometry required in the mating holder.

Key Features

• Solid carbide substrate with PVD AlTiN coating for extended tool life in high-temperature cutting environments
• KCU25 grade provides a balance of wear resistance and toughness for interrupted and continuous grooving cuts
• Left-hand orientation with 4.78 mm cutting width and 3.81 mm maximum depth of cut
• 12-degree rake angle supports positive cutting action and reduced cutting forces
• 0.57 mm corner radius for controlled surface finish at groove edges
• Clamp-style insert holding method compatible with Top Notch series toolholders

Compatibility

Designed for use with Top Notch series clamp-style grooving toolholders that accept the NF insert style with a 3188 insert size seat. Verify holder compatibility with the NF seat geometry and left-hand cutting direction before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Disengage spindle power and confirm the machine is in a locked-out state before seating or removing the insert. Seat the insert fully into the holder pocket and tighten the clamping screw to the toolholder manufacturer's specified torque using the appropriate Torx or hex key. Inspect the insert seat and clamping surfaces for chips or debris that could cause improper seating and edge deflection.