Seco 02779771 Milling Insert XNEX080608R-M08 MS2500 Carbide

Product Description

The SECO 02779771 is a solid carbide milling insert carrying ANSI and ISO designation XNEX080608R-M08 in the MS2500 manufacturer grade. It features a trigon shape with six cutting edges, a negative rake angle of 24 degrees, and a honed cutting edge style suited for demanding material removal applications. The insert is coated via CVD process with a TiCN and Al2O3 multilayer coating, delivering wear resistance and thermal stability at the cutting zone. A corner radius of 0.0315 inches and a maximum depth of cut of 0.2953 inches define its geometry for finishing and semi-finishing passes. Licensed machinists and CNC toolroom technicians install this insert in compatible indexable milling toolholders.

This insert is engineered primarily for superalloys and titanium (ISO material code S), with secondary application in steel and stainless steel (ISO material codes P and M). It suits milling operations in aerospace, energy, and precision-manufacturing environments where tool life in difficult-to-machine materials is critical. The M08 chip breaker geometry is designed to manage chip formation in these tough workpiece materials. The insert is double-sided, maximizing usable cutting edges per insert. It is held in the toolholder by a screw-clamp method and is right-hand oriented. Compatible cutter series is R220.96-08.

Key Features

• Solid carbide medium grain substrate with CVD TiCN and Al2O3 coating for extended tool life in hard-to-machine materials
• Trigon insert shape with 6 cutting edges and double-sided design for cost efficiency per edge
• Corner radius of 0.0315 inches (1/32 inch) for controlled surface finish on superalloys and titanium
• Negative rake angle with 24-degree rake and honed edge style for stable, secure cutting action
• M08 chip breaker optimized for steel, stainless steel, superalloys, and titanium
• Screw-holding method with right-hand orientation; compatible with R220.96-08 cutter series

Compatibility

Designed for use with the R220.96-08 cutter series. Primary workpiece materials are superalloys and titanium; secondary materials are steel and stainless steel. Insert series is XNEX-08.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician with the spindle locked and machine powered down before indexing or replacing inserts. Use the correct torx or hex key to the toolholder manufacturer's specified procedure when tightening the clamping screw — do not overtighten. Inspect the insert pocket and seating surface for chips or debris before seating each new insert edge. Confirm insert orientation matches right-hand cutter rotation before resuming operation.