Seco 02960885 Turning Insert DCMT21.51-F1 TP2501 Carbide

Product Description

The SECO 02960885 is a solid carbide indexable turning insert in the DCMT-F1 series, designed for precision finishing operations on CNC lathes and turning centers. It carries the ANSI code DCMT21.51-F1 and ISO code DCMT070204-F1. The 55-degree diamond (rhombic) insert shape provides a sharp cutting edge geometry suited to light finishing cuts. The Duratomic CVD multilayer coating — TiCN, Al2O3, and Cr — delivers high wear resistance across a broad range of workpiece materials. With a 0.25-inch inscribed circle and a 0.0157-inch corner radius, this insert is built for tight-tolerance finishing passes where surface finish and dimensional accuracy are critical. Licensed machinists and CNC operators working in production shops are the primary users.

This insert is rated for steel (P-grade materials P10 through P35), stainless steel (M-grade), and cast iron (K-grade). It is suited to applications including turning, facing, boring, and back turning on small-diameter features. The F1 chip breaker geometry is optimized for finishing operations, producing controlled chip evacuation at the light feeds and depths typical of final-pass work. A neutral hand orientation and positive rake angle support low cutting forces, making this insert compatible with both rigid and moderately flexible setups. Maximum depth of cut is 0.2913 inches.

Key Features

• Duratomic CVD coating (TiCN / Al2O3 / Cr) for high wear resistance on steel and stainless steel
• F1 chip breaker geometry optimized for finishing cuts and controlled chip formation
• 55-degree diamond insert shape with positive rake and 7-degree relief angle for reduced cutting forces
• Neutral hand orientation supports back turning, boring, facing, and straight turning
• Two cutting edges per insert; screw-held mounting for repeatable edge indexing
• Compliant with both ANSI and ISO insert standards (DCMT21.51 / DCMT070204)

Compatibility

Designed as an OEM-style replacement or standard-stock finishing insert for SECO DCMT-series toolholders accepting DCMT21.51 (ISO DCMT070204) inserts with screw-clamp holding. No specific machine or toolholder model numbers were provided in the product data.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Before indexing or replacing an insert, shut down spindle rotation and confirm the machine is in an e-stop or locked-out state per applicable shop safety procedures. Use the correct Torx or hex key to seat the clamp screw to toolholder manufacturer specification — do not over-torque. Inspect the toolholder pocket for debris or wear before seating the new insert to ensure proper seating and edge repeatability.