Seco 02959801 CNMG432-MF2 TP1501 Turning Insert Carbide

Product Description

The SECO 02959801 is a solid carbide turning insert in the CNMG432-MF2 series, designed for negative-rake external and internal machining operations. It carries the TP1501 manufacturer grade with a Duratomic CVD coating stack of TiCN, Al2O3, and Cr, providing wear resistance suited to continuous and interrupted steel cuts. The insert features an 80-degree diamond (rhombic) shape, a 0.5-inch inscribed circle, and a 1/32-inch (0.0315 inch) corner radius. With four usable cutting edges and a chamfered and honed edge prep, it delivers consistent chip control through the MF2 chip breaker geometry. Weight is 0.02 pounds per insert.

This insert is built for boring, facing, and turning applications on steel as the primary workpiece material, with cast iron and hard materials as secondary targets. It fits into standard CNMG-style toolholders using clamp, pin, or lever-lock holding methods. The MF2 chip breaker geometry targets finishing to medium roughing passes on steel, making it a practical choice for machine shops, maintenance machining operations, and production turning where consistent chip evacuation in steel and cast iron is required.

Key Features

• Duratomic CVD coating (TiCN, Al2O3, Cr) for extended tool life in steel and cast iron
• MF2 chip breaker geometry for reliable chip control across finishing and medium roughing
• Four cutting edges per insert for reduced cost per edge
• Chamfered and honed cutting edge style for edge stability and reduced built-up edge
• Negative rake, neutral hand — compatible with right-hand and left-hand toolholder setups
• Meets ANSI and ISO standards; ISO code CNMG120408-MF2

Compatibility

Designed for use in CNMG-style toolholders accepting clamp, pin, or lever-lock insert retention. Compatible with holders designed for a 0.5-inch inscribed circle, 3/16-inch insert thickness, and a 0.2028-inch hole diameter. Suitable for boring, facing, and turning operations. Primary workpiece material code P (steel); secondary codes K (cast iron) and H (hard material). Material grades P10 and P20.

Installation Notes

Installation is performed by machinists or toolroom technicians following standard insert indexing procedures. Always power down and lock out the machine spindle before indexing or replacing inserts. Inspect the toolholder seat and clamping hardware for wear or debris before seating a new insert. Follow the toolholder manufacturer torque specifications for the clamping screw — do not over-torque, as this can fracture the insert.