Kennametal 5533089 Cutoff Insert KCU25 Carbide 1.4 Mm

Product Description

The KENNAMETAL 5533089 is a single-end carbide cutoff insert from the Beyond Evolution series, designed for parting and cut-off operations on CNC lathes and turning centers. It features an EC-U insert style with a 1.4 mm (0.0551 inch) cutting width and a neutral lead angle, making it suitable for straight plunge parting with consistent chip control. The CM chipbreaker geometry promotes efficient chip evacuation during cut-off passes. An AlTiN PVD coating applied over a KCU25 grade carbide substrate delivers elevated wear resistance and thermal stability in demanding turning applications. Machinists and CNC operators working in production turning environments install this insert type.

This insert is suited for cut-off and grooving operations in high-volume production turning, particularly where tight width tolerances and controlled chip formation are required. The Beyond Evolution series is engineered for demanding metal-cutting environments including steel and cast iron workpieces where consistent tool life is a priority. It fits insert seat size 1B toolholders designed for EC-U style cutoff inserts. The single-end configuration means the insert is replaced rather than indexed to a second cutting edge.

Key Features

• EC-U insert style with 1B seat size for compatibility with standard cutoff toolholders
• 1.4 mm (0.0551 inch) cutting width for precision parting cuts
• Neutral lead angle and 2-degree relief angle for straight plunge parting
• CM chipbreaker geometry for controlled chip evacuation
• AlTiN coating applied via PVD process for wear resistance and thermal stability
• KCU25 carbide grade, material grade C2 and C6, suited for a range of workpiece materials
• Single-end insert from the Beyond Evolution series

Compatibility

Designed as an OEM-style replacement cutoff insert for EC-U style, 1B seat size toolholders used in CNC turning and parting applications.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Always power down and lock out the machine before changing inserts. Use the appropriate torque wrench and insert clamp hardware specified by the toolholder manufacturer — do not overtighten the clamping screw, as this can fracture the carbide insert. Inspect the insert pocket and seating surface for debris or damage before seating the new insert.