Kennametal 4109670 Grooving Insert KCU25 Solid Carbide

Product Description

The KENNAMETAL 4109670 is a solid carbide grooving insert designed for precision external grooving and parting operations on CNC lathes and turning centers. Built to the Top Notch series standard, it carries the NG2047K insert style designation and features a KCU25 grade substrate with a PVD-applied AlTiN coating for extended tool life in demanding cut conditions. The insert delivers a cutting width of 1.19 mm (0.0469 inch) and a maximum depth of cut of 1.27 mm (0.0500 inch), making it well suited for fine grooving work requiring tight dimensional control. A clamp-style insert holding method ensures secure seating during interrupted or high-feed passes.

This insert is intended for use in metalworking operations where precise groove geometry and consistent surface finish are required. The right-hand cutting orientation positions it for standard lathe setups. The KCU25 grade with AlTiN finish is appropriate for a range of workpiece materials including steels and cast irons where heat resistance and wear resistance at the cutting edge are priorities. Machinists and tooling technicians in production shops and maintenance environments are the primary installers of this style of insert.

Key Features

• Solid carbide construction, KCU25 manufacturer grade with C2 and C6 material grade equivalents
• PVD-applied AlTiN coating for heat resistance and extended edge life
• Cutting width: 1.19 mm (0.0469 inch)
• Maximum depth of cut: 1.27 mm (0.0500 inch), with a cut range up to 2.00 mm
• Corner radius of 0.09 mm (0.0035 inch) for controlled groove geometry
• Clamp-style holding method for rigid, repeatable insert positioning
• Right-hand cutting orientation, NG insert style, Top Notch series

Compatibility

Designed for use in Top Notch series grooving toolholders that accept NG2047 style inserts with clamp-style holding. Verify toolholder designation against the Top Notch series compatibility chart before ordering. The MSC and manufacturer cross-reference number for this insert is NG2047R/LK.

Installation Notes

Insert installation and replacement should be performed by a qualified machinist or tooling technician with the machine fully powered down and the spindle locked. Use the appropriate torx or clamp fastener specified by the toolholder manufacturer to secure the insert — do not overtighten, as carbide inserts are brittle and can crack under excess clamping force. Inspect the toolholder pocket and clamp for wear or debris before seating the new insert. Always verify insert orientation and cutting hand match the programmed tool path before resuming operations.