Seco 03094144 CNMG643-MR7 Turning Insert 3/4 Inch Ic

Product Description

The SECO 03094144 is a CNMG643-MR7 series indexable turning insert designed for medium to heavy material removal in steel and stainless steel applications. It features a solid carbide substrate with a CVD-applied Duratomic multilayer coating — TiCN, Al2O3, and Cr — that extends edge life under demanding cutting conditions. The insert has a 3/4 inch inscribed circle, an 80-degree diamond shape, a 3/64 inch corner radius, and a T-Land cutting edge style with an MR7 chip breaker geometry. Four usable cutting edges per insert make it a cost-effective choice for production turning environments. Negative rake and a neutral hand orientation suit a wide range of tool holder setups.

This insert is rated for boring, facing, and turning operations. Its primary workpiece material designation is Steel (ISO P), with a secondary rating for Stainless Steel (ISO M), covering material grades P20, P30, and P40. It is suited for use in CNC lathes and turning centers in both production shop and job shop environments. The clamp, pin, and lever lock holding methods give it broad compatibility with standard CNMG tooling systems. Machinists and CNC operators performing roughing to semi-finishing passes on carbon steel, alloy steel, and austenitic stainless will find this geometry appropriate for those cut profiles.

Key Features

• Duratomic CVD multilayer coating: TiCN, Al2O3, and Cr for extended tool life in steel cutting
• MR7 chip breaker geometry designed for medium to heavy turning passes
• Four cutting edges per insert — reduces per-edge tooling cost
• T-Land cutting edge style for improved edge strength and stability
• Negative rake, neutral hand — fits a wide range of CNMG-compatible tool holders
• Rated for boring, facing, and turning in a single insert geometry
• Compliant with ANSI and ISO insert standards; ISO code CNMG190612-MR7

Compatibility

Designed for use in CNMG-style tool holders that accept clamp, pin, or lever lock insert holding methods. Compatible with tooling systems requiring an 80-degree diamond insert with a 3/4 inch inscribed circle and 0.3118 inch hole diameter. Intended for steel (P20, P30, P40) and stainless steel workpiece materials. Conforms to ANSI and ISO standards for CNMG insert geometry.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before seating or indexing inserts. Use the correct torque wrench and manufacturer-specified clamping hardware for the tool holder in use — do not over-tighten the clamping screw, as this can fracture the carbide substrate. Inspect the insert pocket and clamping components for wear or debris before seating a new edge.