Seco 74081225 Turning Insert DNMP432-MF1 890 Carbide

Product Description

The SECO 74081225 is a solid carbide, uncoated turning insert in the DNMP-MF1 series, designed for precision material removal on superalloys and titanium. It features a 55-degree diamond shape with a negative rake geometry and a honed cutting edge for consistent performance under demanding conditions. With four usable cutting edges and an MF1 chip breaker, this insert supports efficient chip control across a range of finishing and semi-finishing operations. Licensed HVAC techs and machinists specify this insert for high-performance CNC turning centers where tool life and edge stability matter. It is sold individually with a minimum order quantity of 10 pieces per order.

This insert is suited for external turning, boring, facing, and back turning operations in CNC and manual lathe applications. It is primarily intended for machining superalloys and titanium, with secondary suitability for steel, cast iron, non-ferrous, and hardened materials per secondary workpiece material codes M, K, N, and H. The MF1 chip breaker geometry is optimized for light to moderate depths of cut, making this insert a strong candidate for finishing passes on difficult-to-machine materials in aerospace, energy, and precision manufacturing environments.

Key Features

• 55-degree diamond insert shape with negative rake for stable, aggressive cutting geometry
• MF1 chip breaker designed for controlled chip formation on superalloys and titanium
• Four cutting edges per insert maximize tool utilization and reduce cost per edge
• Honed cutting edge style reduces micro-chipping on hard-to-machine workpiece materials
• Compatible with clamp, pin, and lever lock insert holding methods for flexible toolholder use
• Uncoated grade 890 solid carbide construction rated for material grades S10 and S20

Compatibility

Conforms to ANSI and ISO standards; ISO equivalent designation is DNMG150408-MF1. Designed for use in DNMP-style toolholders accepting a 432 insert size code with clamp, pin, or lever lock retention. Suitable for back turning, boring, facing, and turning applications across multiple workpiece material types including superalloys, titanium, steel, cast iron, non-ferrous, and hardened materials.

Installation Notes

Installation is performed by qualified machinists or tooling technicians following the toolholder manufacturer's seating and clamping procedures. Always power down and lock out the machine spindle before indexing or replacing inserts. Verify insert seating is fully flush against the toolholder pocket before clamping to avoid edge chipping or insert movement under cutting load. Follow applicable shop safety and machine tool standards when handling carbide inserts, as edges are sharp and brittle.