Kennametal 2889261 Milling Insert KC522M Solid Carbide Tialn

Product Description

The KENNAMETAL 2889261 is a solid carbide milling insert with ISO designation SDCT120432ENLD2, designed for use in indexable milling tool bodies that accept the SDCT insert style. Coated with TiAlN via a PVD process, this insert delivers wear resistance and thermal stability across a broad range of workpiece materials. It carries Kennametal grade KC522M and features a square insert shape with a 15-degree relief angle and an LD2 chip breaker geometry. The screw-clamping hold method keeps the insert securely seated during high-feed and interrupted cuts. Licensed milling machinists and CNC tool setters are the primary installers of this type of insert.

This insert is suited for milling operations on steel, stainless steel, cast iron, superalloys, titanium, and hard materials. Its neutral hand designation makes it usable in a range of cutter orientations. The 0.126-inch corner radius helps distribute cutting forces and reduces edge chipping on demanding workpiece materials. It is appropriate for both roughing and semi-finishing passes where controlled chip formation is needed. The LD2 chip breaker is optimized for the material grades listed, making this insert a practical choice in production milling environments.

Key Features

• TiAlN coating applied via PVD process for improved wear resistance and thermal stability
• Solid carbide substrate in Kennametal grade KC522M for consistent performance on steel and difficult alloys
• Square insert shape (SDCT style) with 15-degree relief angle for positive cutting action
• LD2 chip breaker geometry designed for steel, stainless steel, cast iron, superalloys, titanium, and hard materials
• 0.126-inch corner radius reduces stress concentration and extends tool life
• Screw-clamping insert holding method for secure, repeatable seating in compatible tool bodies

Compatibility

Designed for use in SDCT-style indexable milling tool bodies that accept a 1/2-inch inscribed circle square insert with a screw-clamping hold method. The ISO code SDCT120432ENLD2 and insert size code 438 can be used to confirm fitment with compatible cutter bodies.

Installation Notes

Insert installation should be performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machine spindle before changing inserts. Use the correct torx or hex key to tighten the clamping screw to the tool body manufacturer's specified seating torque — do not overtighten, as this can fracture the insert. Inspect the insert pocket seat for chips or debris before seating a new insert to ensure proper contact and runout.