Kennametal 4114285 Carbide Cutoff Insert KCU25 Altin

Product Description

The KENNAMETAL 4114285 is a double-end carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. It belongs to the A4 series and carries the KCU25 manufacturer grade, a PVD-applied AlTiN coating that supports elevated cutting speeds and resists heat buildup at the cutting zone. The insert features a 3.05 mm (0.1200 inch) cutting width, a 0.2 mm (0.0080 inch) corner radius, and a 6-degree left-hand lead angle with a 2-degree relief angle. The CF chipbreaker geometry promotes controlled chip evacuation during parting cuts. Installation and tool selection are handled by machinists and CNC setup technicians.

This insert is suited for parting, grooving, and cutoff applications on ferrous and non-ferrous workpieces in production turning environments. The double-end configuration allows both ends of the insert to be used before replacement, reducing per-cut tooling cost in high-cycle operations. The clamp-style insert holding method seats the insert securely in compatible A4-series toolholders. The insert seat size is 3. Typical applications include bar stock cutoff, groove profiling, and face grooving on manual or CNC lathes where consistent dimensional accuracy and chip control are required.

Key Features

• KCU25 carbide grade with PVD AlTiN coating for extended tool life at elevated cutting temperatures
• 3.05 mm (0.1200 inch) cutting width with CF chipbreaker for controlled chip flow
• 6-degree left-hand lead angle and 2-degree relief angle for clean parting geometry
• Double-end design doubles usable life per insert
• Clamp-style holding method ensures rigid, repeatable seating in A4-series holders
• Overall length of 20.10 mm (0.7913 inch) with a cutting height of 4.01 mm (0.1580 inch)

Compatibility

Designed for use with A4-series clamp-style cutoff and grooving toolholders that accept insert seat size 3. Consult the toolholder manufacturer specifications to confirm seat size and clamping compatibility before installation.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC setup technician with the machine powered off and in a locked-out, tagged-out state per applicable machine safety standards. Use the correct clamping screw torque as specified by the toolholder manufacturer — do not overtighten, as this can fracture the carbide insert. Inspect the insert seat and clamp for chips or debris before seating the insert. Verify lead angle orientation — this insert is left-hand; confirm it matches the toolholder and intended cut direction before resuming operation.