Kennametal 4109846 Grooving Insert KCU25 Solid Carbide Altin

Product Description

The KENNAMETAL 4109846 is a solid carbide grooving insert designed for precision external grooving and turning operations on CNC lathes and turning centers. Manufactured in the Top Notch series, it features a KCU25 grade carbide substrate with a PVD-applied AlTiN coating for extended tool life under elevated cutting temperatures. The insert has a 2.39 mm cutting width, a maximum depth of cut of 6.35 mm, and a left-hand orientation. The K chip breaker geometry promotes controlled chip evacuation in medium to finishing cut applications. Machinists and CNC operators working with steel, stainless, and cast iron will find this insert suited for interrupted and continuous grooving passes where dimensional accuracy is critical.

This insert is intended for use in Top Notch series clamp-style grooving toolholders on CNC turning equipment. It is suited for light to medium-duty grooving in materials classified under C2 and C6 material grades, including carbon steels and cast irons. The 55-degree included angle and 0.19 mm corner radius support clean groove profiles with tight tolerances. Typical applications include snap ring grooves, undercuts, and face grooving on turned components in general machining and production environments.

Key Features

• KCU25 solid carbide grade with PVD AlTiN coating for heat and wear resistance
• 2.39 mm cutting width with a maximum depth of cut of 6.35 mm
• Left-hand insert orientation for specific toolholder configurations
• K chip breaker geometry for controlled chip flow in medium to finishing operations
• Clamp-style insert holding method compatible with Top Notch series toolholders
• 55-degree included angle and 0.19 mm corner radius for accurate groove profiles

Compatibility

Designed for use with Top Notch series clamp-style grooving toolholders that accept NGD-style inserts with an insert size designation of 3094. The MSC and manufacturer cross-reference number is NGD3094R/LK.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before seating or replacing the insert. Use the appropriate clamp screw torque per the toolholder manufacturer specifications. Inspect the insert seat and clamp for chips or debris before installation to ensure proper seating and prevent insert rocking.