Kennametal 4109665 Grooving Insert NG2041 KCU25 Left Hand

Product Description

The KENNAMETAL 4109665 is a solid carbide grooving insert in the Top Notch series, designed for precision external grooving and parting operations on CNC lathes and turning centers. It carries a KCU25 grade designation with a PVD-applied AlTiN coating for improved wear resistance and thermal stability at the cutting edge. The insert delivers a 1.04 mm cutting width and a maximum depth of cut of 1.27 mm, making it well suited for shallow, tight-tolerance grooves in ferrous and non-ferrous materials. It is a left-hand orientation insert held in place by a clamp-style toolholder. Machinists and CNC turning specialists are the primary users of this insert.

This insert is intended for use in grooving applications where controlled chip formation and consistent groove width are critical. The Top Notch series is a widely recognized platform in production turning environments, applicable to both light-duty and medium-duty grooving on small-diameter workpieces. The metric insert size designation is 2041, and the material grade rating is C2 and C6, covering a broad range of workpiece materials. The AlTiN coating supports dry or minimal-coolant machining strategies where heat buildup at the cutting zone must be managed.

Key Features

• Solid carbide construction with PVD AlTiN coating for extended tool life
• 1.04 mm cutting width for precise, repeatable groove dimensions
• Maximum depth of cut of 1.27 mm, suitable for shallow grooving operations
• Left-hand insert orientation for compatible Top Notch toolholders
• Clamp-style holding method for secure, repeatable seating
• 0.09 mm corner radius minimizes stress concentration at groove walls

Compatibility

Designed for use with Top Notch series clamp-style grooving toolholders that accept the NG2041 insert size. The MSC and manufacturer cross-reference number is NG2041R/L.

Installation Notes

Insert replacement and seating should be performed by a qualified machinist or CNC tooling technician with the machine fully stopped and the spindle locked out per shop lockout/tagout procedures. Ensure the toolholder pocket is clean and free of chips before seating the insert. Do not exceed the rated maximum depth of cut, as overloading a grooving insert can cause sudden fracture. Verify left-hand orientation matches the toolholder before tightening the clamp.