Seco 74079736 Milling Insert Trigon F25M Solid Carbide

Product Description

The SECO 74079736 is a solid carbide trigon milling insert designed for high-performance metal removal in demanding milling applications. Carrying the ANSI and ISO designation 218.19-160T-04-M08, this insert features a positive rake geometry with a 10-degree rake angle and a 12-degree relief angle, promoting free-cutting action and reduced cutting forces. The F25M grade is coated with TiAlN and TiN via a PVD process, providing thermal resistance and wear protection across a range of workpiece materials. With three cutting edges and a T-Land cutting edge style, the insert balances edge strength with chip control. Licensed HVAC, machining, and tooling professionals specify this insert for its consistent performance in steel, stainless steel, and cast iron applications.

This insert is suited for use in milling operations across universal workpiece material classifications, with primary material codes H and P and secondary material codes P, M, and K covering steel, stainless steel, and cast iron. The M08 chip breaker geometry supports medium-grain material removal. It is compatible with the R218.19-32, R217.21-R160, and R220.21-R160 cutter series. Typical install scenarios include face milling, shoulder milling, and general-purpose milling on CNC machining centers in both production and maintenance shop environments.

Key Features

• Solid carbide construction with TiAlN and TiN PVD coating for extended tool life
• Trigon (triangle) insert shape with 60-degree included angle and three usable cutting edges
• Positive rake angle of 10 degrees and 12-degree relief angle for reduced cutting forces
• M08 chip breaker optimized for medium-grain steel, stainless steel, and cast iron
• Maximum depth of cut of 0.0790 inches with a corner radius of 0.0472 inches (3/64 inch)
• Neutral hand orientation for flexible cutter mounting configurations

Compatibility

Compatible with the R218.19-32, R217.21-R160, and R220.21-R160 cutter series. Insert is screw-held and conforms to ANSI and ISO code 218.19-160T-04-M08.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Always power down and lock out the machine spindle before seating or replacing inserts. Use the correct torx or hex key to secure the clamping screw to the tool body per the cutter body manufacturer specifications. Inspect the insert pocket and seating surface for chips or debris before installing a new insert to ensure proper seating and runout.