Seco 02828071 Milling Insert XNEX040308TR-M08 MK2050

Product Description

The SECO 02828071 is a solid carbide trigon-style milling insert carrying the ANSI and ISO designation XNEX040308TR-M08 and manufacturer grade MK2050. It features a double-sided design with six cutting edges, a negative rake angle of 27 degrees, and a T-Land cutting edge style suited for demanding face and shoulder milling applications. The insert measures 0.2638 inches inscribed circle diameter and 0.1295 inches thick, with a corner radius of 0.0315 inches (1/32 inch). A dual-layer PVD coating of TiSiN and TiAlN provides heat and wear resistance in high-productivity cuts. Installation is performed by licensed machinists or CNC tooling technicians using a screw-clamping holding method.

This insert is designed for milling cast iron, steel, and hard materials, corresponding to ISO material codes K, P, and H. It is part of the XNEX-04 series and is compatible with SECO cutter series R217.96-04 and R220.96-04. The M08 chip breaker geometry is optimized for medium-grain material applications where chip control and surface finish consistency are priorities. Typical use scenarios include production milling on CNC machining centers in both job-shop and high-volume manufacturing environments.

Key Features

• Double-sided trigon insert with 6 usable cutting edges for extended tool life per insert
• PVD-applied TiSiN and TiAlN dual coating for thermal stability and flank wear resistance
• Maximum depth of cut of 0.1575 inches with a cutting edge effective length of 0.1575 inches
• Negative rake geometry with 27-degree rake angle and 0-degree relief angle for robust edge strength
• M08 chip breaker designed for medium-grain cast iron and steel applications
• Right-hand cut orientation; screw-held mounting for secure and repeatable positioning

Compatibility

Compatible with SECO cutter series R217.96-04 and R220.96-04. Designed for right-hand milling operations on cast iron, steel, and hard material workpieces as an OEM-specification insert within the XNEX-04 series.

Installation Notes

Installation is performed by qualified machinists or CNC tooling specialists. Always power down and lock out the spindle before indexing or replacing inserts. Use the correct Torx or hex key specified by the cutter body manufacturer when tightening the clamping screw — do not over-torque. Inspect the pocket seating surface for chips or debris before seating the insert to ensure proper contact and runout.