Seco 03280021 Turning Insert TCMT32.51-MF2 TM3501 Carbide

Product Description

The SECO 03280021 is a solid carbide turning insert in the TCMT series, designed for precision metal cutting in CNC turning applications. This insert carries grade TM3501 with a Duratomic CVD coating combining TiCN, Al2O3, and Cr layers for wear resistance and thermal stability at the cutting edge. The insert features a 60-degree triangular shape with three usable cutting edges, a 3/8 inch inscribed circle, and a 1/64 inch corner radius. The MF2 chip breaker geometry and chamfered-and-honed cutting edge style make this insert well suited for finishing and light roughing operations on stainless steel and steel. Installed by machinists and CNC operators, it mounts via screw clamping in compatible TCMT-style toolholders.

This insert is primarily rated for stainless steel (ISO material code M) and secondarily for steel (ISO material code P), covering material grades M30 and M40. Multi-use application support includes turning, facing, boring, and back turning. The neutral hand orientation allows use in both right- and left-hand setups where the toolholder geometry permits. It conforms to ANSI and ISO standards and carries ISO designation TCMT16T304-MF2 for cross-reference against metric-specified tooling systems. Typical use is in production turning cells, job shops, and maintenance machining environments where consistent surface finish on stainless or alloy steel is required.

Key Features

• Duratomic CVD coating (TiCN, Al2O3, Cr) for extended tool life on stainless and steel
• MF2 chip breaker geometry suited for finishing and light roughing passes
• Three cutting edges per insert for cost efficiency
• Chamfered and honed cutting edge style reduces chipping risk at entry
• Positive rake angle of 18 degrees reduces cutting forces
• Screw-clamp holding method provides rigid, repeatable seating in the toolholder

Compatibility

Designed for use in TCMT-style screw-clamp toolholders conforming to ANSI and ISO standards. Cross-references to ISO designation TCMT16T304-MF2 and industry standard number TCMT32.51-MF2. Compatible with multi-use operations including turning, facing, boring, and back turning.

Installation Notes

Installation is performed by machinists or CNC setup technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate Torx or hex key to seat the clamping screw without overtightening, which can crack carbide. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert to ensure proper contact and runout control.