Kennametal 5941087 Carbide Cutoff Insert 4mm Lh

Product Description

The KENNAMETAL 5941087 is a single-end carbide cutoff insert designed for parting and grooving operations on CNC lathes and turning centers. Part of the Beyond Evolution series, it features a KCU25 carbide grade with an AlTiN coating applied via PVD process, delivering strong wear resistance and thermal stability in demanding cut-off applications. The insert carries a 4.00 mm (0.1570 inch) cutting width, a 0.008 inch corner radius, a neutral lead angle, and a CM chipbreaker geometry. It is installed by machinists and CNC operators performing production turning work.

This insert is suited for parting and grooving on metal workpieces in both production and job-shop environments. The left-hand configuration and CM chipbreaker support reliable chip control in ferrous and non-ferrous materials. The EC-U insert style and size code 4 seat designation must be matched to a compatible toolholder. Single-end construction means the insert is indexed once before replacement.

Key Features

• KCU25 carbide grade with AlTiN PVD coating for extended tool life in cut-off applications
• 4.00 mm (0.1570 inch) cutting width with 0.008 inch corner radius
• Neutral lead angle (0 degrees) with left-hand insert orientation
• CM chipbreaker geometry for consistent chip control
• EC-U insert style, insert seat size 4, single-end design
• 2-degree relief angle; material grades C2 and C6

Compatibility

Designed for use with EC-U style, size 4 insert seat toolholders compatible with the Beyond Evolution cutoff and grooving system. Verify toolholder insert pocket specifications before installation.

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 correct torque wrench and clamping screw specified by the toolholder manufacturer — do not overtighten. Confirm insert hand orientation and seat size match the toolholder pocket before beginning a cut.