Kennametal 4109907 Grooving Insert NR3031 KCU25 Carbide

Product Description

The KENNAMETAL 4109907 is a solid carbide grooving insert in the Top Notch series, designed for precision external grooving and turning operations on CNC lathes and turning centers. Finished with a PVD-applied AlTiN coating, this right-hand insert offers a 1.58 mm cutting width and a maximum depth of cut of 2.39 mm. The KCU25 grade carbide substrate combined with the AlTiN finish provides thermal resistance and edge durability in demanding interrupted-cut and continuous-cut applications. Machinists and CNC operators working with ferrous and non-ferrous materials will find this insert suited to production-volume grooving where consistent geometry is critical.

This insert is used in external grooving operations on conventional and CNC turning equipment. It fits clamp-style Top Notch toolholders and is appropriate for light to moderate grooving depths in the 2.00 mm to 3.00 mm maximum depth-of-cut range. The full-radius profile with a 0.79 mm corner radius makes it well suited for groove finishing passes and profiling cuts where a clean, radiused groove floor is required. Typical applications include grooving on steel, stainless, and similar workpiece materials in job shop and production turning environments.

Key Features

• Solid carbide KCU25 grade with PVD AlTiN coating for thermal and wear resistance
• 1.58 mm cutting width with full-radius geometry and 0.79 mm corner radius
• Maximum depth of cut of 2.39 mm, rated for the 2.00 mm to 3.00 mm DOC range
• Right-hand cut orientation; clamp-style insert holding method
• 55-degree included angle with 8.74 mm cutting height
• Part of the Top Notch series for compatibility with Top Notch clamp-style toolholders

Compatibility

Designed for use with Top Notch series clamp-style grooving toolholders accepting NR3031 insert size. The manufacturer cross-reference number is NR3031R/L. Verify toolholder insert pocket specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and all motion is locked out before seating or removing the insert. Use the correct clamp screw torque per the toolholder manufacturer's documentation and inspect the insert seat for chips or debris before clamping. Do not exceed the rated maximum depth of cut for this insert grade and geometry.