Seco 03310400 Turning Insert TCMT32.51-M3 TP25 Carbide

Product Description

The SECO 03310400 is a solid carbide turning insert in the TCMT series, designed for precision metal cutting in CNC and manual turning applications. This triangular insert carries SECO grade TP25 with a multilayer CVD coating of TiCN and Al2O3 for extended tool life in steel and stainless steel operations. The insert features a 3/8 inch inscribed circle, a 0.0157 inch corner radius, and a positive rake geometry with a chamfered and honed cutting edge. It is held by screw-clamping and suits turning centers used by machinists and toolroom professionals working in production or job shop environments.

This insert is rated primarily for steel (ISO material code P) and is also suitable for stainless steel and cast iron (ISO codes M and K). It supports multiple operations including turning, facing, boring, and back turning, making it a versatile choice for shops running varied workpiece materials. The M3 chip breaker geometry is engineered for medium cutting conditions. Material grades P20, P30, and P35 indicate the recommended application range within steel cutting. The neutral hand orientation allows use on both left-hand and right-hand toolholders configured for TCMT-style inserts.

Key Features

• Solid carbide substrate with multilayer CVD coating: TiCN plus Al2O3 for wear resistance in steel cutting
• Triangular insert shape with 60-degree included angle and 3 usable cutting edges per insert
• M3 chip breaker for medium-depth turning, facing, boring, and back turning operations
• Positive rake angle (18 degrees) with chamfered and honed cutting edge style for clean chip formation
• Screw-clamping insert holding method compatible with standard TCMT toolholder pockets
• Complies with ANSI and ISO standards; ISO code TCMT16T304-M3, industry standard number TCMT32.51-M3

Compatibility

Designed as an OEM-style replacement insert for TCMT-series screw-clamp toolholders accepting a 3/8 inch inscribed circle triangular insert with 7-degree relief angle and a 0.1772 inch hole diameter. Compatible toolholders must conform to ANSI and ISO TCMT pocket specifications.

Installation Notes

Installation is performed by machinist or toolroom personnel. Power down and lock out the machine spindle before indexing or replacing inserts. Use the manufacturer-specified torque wrench and clamping screw supplied with the toolholder system to secure the insert; do not over-tighten by hand. Inspect the insert pocket seat and clamping screw for wear or damage before seating a new insert to ensure proper seating and cutting-edge alignment.