Kennametal 4109666 Grooving Insert NG2041 KCU25 Carbide Altin

Product Description

The KENNAMETAL 4109666 is a solid carbide grooving insert in the Top Notch series, designed for external grooving and parting operations on CNC lathes and turning centers. It carries a PVD-applied AlTiN coating that improves wear resistance and thermal stability during interrupted cuts and high-speed finishing passes. The insert has a 1.04 mm cutting width, a maximum depth of cut of 1.27 mm, and a 0.09 mm corner radius. It is sized to the NG2041 format and is intended for right-hand cutting applications. Installation uses a mechanical clamp-style holding method. Machinists and CNC operators working in precision turning environments are the primary users of this insert.

This insert is suited for grooving, recessing, and light parting operations in metric-dimensioned setups on production turning equipment. The NG insert style fits Top Notch series toolholders that accept NG2041 geometry. The KCU25 grade is well matched to applications requiring a tough, coated carbide insert where controlled chip formation and consistent groove geometry are critical. It is sold individually with a minimum order quantity of 5 units.

Key Features

• Solid carbide construction with PVD AlTiN coating for extended tool life in abrasive and high-temperature cutting conditions
• 1.04 mm cutting width with a maximum depth of cut of 1.27 mm for precise narrow grooving
• 0.09 mm corner radius for sharp, controlled groove geometry without full-radius profile
• Right-hand cutting orientation in NG2041 insert size
• Clamp-style holding method for secure, repeatable seating in compatible Top Notch toolholders
• Manufacturer grade KCU25 with C2 and C6 material grade ratings

Compatibility

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

Installation Notes

This insert is installed and replaced by a machinist or CNC toolroom technician. Always power down and lock out the machine spindle before changing inserts. Use the correct clamping screw torque specified by the toolholder manufacturer — do not over-tighten, as carbide inserts are brittle and can crack under excessive clamp load. Inspect the toolholder seat and clamp for wear or debris before seating a new insert to ensure proper contact and runout.