Kennametal 4111108 Cutoff Insert KCU25 Carbide 4 Mm

Product Description

The KENNAMETAL 4111108 is a single-end carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. It carries a 4 mm (0.1575 inch) cutting width, a neutral lead angle of 0 degrees, and a 2-degree relief angle. The insert is finished with an AlTiN coating applied via a PVD process, which provides thermal resistance and edge hardness at elevated cutting speeds. Grade KCU25 is suited for interrupted cuts and demanding turning applications. The CF chipbreaker geometry promotes chip control in medium-duty cutoff work. Machinists and tool-and-die professionals install this insert into compatible A2-series clamping toolholders.

This insert fits A2-series cutoff and grooving toolholders using a clamp-style insert holding method. It is appropriate for use on ferrous and non-ferrous workpiece materials in both production turning and job-shop environments. The 0.008-inch corner radius and 4.68 mm (0.1843 inch) cutting height make it suited for shallow to moderate-depth parting operations on small to medium-diameter bar stock. Both manual and CNC turning applications are within its intended use range.

Key Features

• 4 mm (0.1575 inch) cutting width for precise parting and grooving
• KCU25 carbide grade with AlTiN coating via PVD process for edge durability
• CF chipbreaker geometry for reliable chip evacuation in medium-duty cuts
• Neutral lead angle and neutral hand for straight cutoff entry
• 2-degree relief angle reduces rubbing on the cut face
• Single-end insert; overall length of 0.4217 inch (10.71 mm)

Compatibility

Designed for use in A2-series clamping-style cutoff and grooving toolholders with an insert seat size of 4. Consult toolholder manufacturer specifications to confirm fitment before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing the insert. Use the correct torque wrench or clamp screw driver specified by the toolholder manufacturer — do not overtighten the clamp, as this can chip the carbide. Inspect the insert seat for debris or wear before seating a new insert to ensure proper support and alignment.