Seco 74069132 Milling Insert OFEX05T305N-E04 F15M Carbide

Product Description

The SECO 74069132 is a solid carbide milling insert carrying ANSI and ISO designation OFEX05T305N-E04, manufactured to grade F15M with a fine-grain carbide substrate. The insert features an octagon shape with 8 cutting edges and a neutral hand orientation, making efficient use of each edge before replacement. A PVD-applied TiAlN and TiN dual coating provides wear resistance and thermal stability during aggressive milling operations. The positive rake angle of 20 degrees and a 26-degree relief angle reduce cutting forces and support clean chip evacuation. The honed cutting edge style helps control edge micro-geometry for consistent performance on hard and difficult-to-machine workpiece materials. Licensed machinists and CNC tooling technicians install this insert in compatible milling cutter bodies.

This insert is suited for milling operations targeting hard materials (ISO material group H) as the primary workpiece material, with secondary capability on cast iron (group K) and non-ferrous metals (group N). It is designed for high-precision face and shoulder milling applications where tight tolerances and surface finish quality are required. The E04 chip breaker geometry supports controlled chip formation across these material groups. Maximum depth of cut reaches 0.1929 inches, and the effective cutting edge length is 0.2075 inches, making it appropriate for moderate-depth passes in production or job-shop environments.

Key Features

• Solid carbide fine-grain substrate with PVD-applied TiAlN and TiN dual coating for extended tool life on hard materials
• 8 usable cutting edges per insert reduce per-edge tooling cost in production settings
• Positive rake (20 degrees) and 26-degree relief angle minimize cutting forces and support free-cutting performance
• Honed cutting edge style provides consistent micro-geometry and edge stability
• Octagon insert shape with neutral hand suits a range of milling cutter body orientations
• Screw-held mounting method ensures rigid, repeatable seating in compatible cutter bodies

Compatibility

Designed for use with SECO milling cutter series R217.43-05 and R220.43-05. Conforms to ANSI and ISO standard designation OFEX05T305N-E04. Insert size code is 05T305.

Installation Notes

Installation is performed by qualified CNC tooling technicians or machinists. Ensure the machine spindle is fully stopped and locked out before seating or replacing inserts. Use the correct torque driver for the clamping screw to avoid insert cracking or pocket damage — refer to the cutter body manufacturer torque specification for this pocket size. Inspect the insert pocket for chips or debris before seating; a contaminated pocket will cause runout and premature edge failure.