Seco 74050198 Turning Insert CNMP432-MF1-24 890 Carbide

Product Description

The SECO 74050198 is a solid carbide, uncoated turning insert in the CNMP-MF1 series, designed for precision material removal on CNC lathes and turning centers. It features an 80-degree diamond insert shape (Shape Code C), a neutral hand orientation, and a negative rake geometry that provides edge strength during heavy interrupted or continuous cuts. The inscribed circle measures 0.5 inches (12.70 mm), the corner radius is 0.0315 inches (1/32 inch), and the insert thickness is 0.1874 inches (3/16 inch). Cutting edges are honed for consistent tool life. The MF1 chip breaker geometry is optimized for finishing and light roughing operations on difficult-to-machine materials.

This insert is engineered primarily for superalloys and titanium (ISO workpiece material code S), with secondary suitability for steel (M), cast iron (K), non-ferrous materials (N), and hardened materials (H). Typical applications include boring, facing, and turning operations where close tolerances and consistent surface finish are required. The insert is multi-use capable, supporting a maximum depth of cut of 0.4764 inches. The ISO equivalent designation is CNMG120408-MF1, which aids cross-referencing on international drawings and tool management systems. The 890 grade is an uncoated solid carbide formulation suited to material grades S10 and S20.

Key Features

• 80-degree diamond shape (CNMP) with negative rake for increased edge strength
• MF1 chip breaker geometry optimized for finishing and light roughing on superalloys and titanium
• Honed cutting edge style for consistent, repeatable performance
• 4 usable cutting edges per insert, reducing per-edge tooling cost
• Compatible with clamp, pin, and lever lock insert holding methods
• Meets ANSI and ISO standards; ISO equivalent CNMG120408-MF1

Compatibility

Designed for use in CNMP-style toolholders that accept 80-degree diamond inserts with a 0.2028-inch hole diameter, clamp, pin, or lever lock holding, and a 432 insert size code. Cross-references to ISO designation CNMG120408-MF1 for international toolholder compatibility verification.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians following shop tooling change procedures. Power down and lock out the machine spindle before seating or removing the insert. Ensure the insert pocket and seating surfaces are clean and free of chips before clamping. Torque the clamping mechanism per the toolholder manufacturer's specifications, not this insert's data sheet.