Kennametal 4111111 Cutoff Insert KCU25 Carbide 4mm

Product Description

The KENNAMETAL 4111111 is a carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. It carries the KCU25 manufacturer grade with an AlTiN coating applied via PVD process, delivering wear resistance and thermal stability in interrupted or continuous cuts. The insert features a 4 mm cutting width, a 6-degree right-hand lead angle, and a CF chipbreaker geometry. Overall length is 0.4252 inches (10.80 mm) and cutting height is 0.1843 inches (4.68 mm). It is held in place by a clamp-style toolholder. Machinists and CNC lathe operators working in production or maintenance environments are the primary users of this insert.

This insert is suited for single-end cutoff and grooving applications on ferrous and non-ferrous workpieces. The CF chipbreaker geometry aids chip control in medium to finish-range cuts. The right-hand lead angle and 2-degree relief angle make it appropriate for standard OD parting operations. Compatible with Series A2 toolholders that accept an insert seat size of 4. This insert is sold individually but carries a minimum order quantity of 5 units.

Key Features

• KCU25 carbide grade with AlTiN PVD coating for wear and heat resistance
• 4 mm cutting width with a 0.0080-inch corner radius for controlled parting cuts
• CF chipbreaker geometry for improved chip evacuation during grooving
• 6-degree right-hand lead angle with 2-degree relief angle
• Clamp-style insert holding for secure seating in compatible toolholders
• Single-end insert design; overall length 0.4252 inches

Compatibility

Designed for use with Series A2 clamp-style cutoff toolholders that accept insert seat size 4 and a 4 mm cutting width insert.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the toolholder is secure before seating or removing the insert. Use the appropriate torx or hex key to engage the clamping screw to the toolholder manufacturer's specification. Inspect the insert seat and clamping surfaces for chips or debris before installation to ensure proper insert contact.