Seco 74017309 Turning Insert CNMG432-MR7 TP40 Carbide

Product Description

The SECO 74017309 is a CNMG432-MR7 series indexable turning insert manufactured from solid carbide and finished with a multilayer CVD coating of TiC, TiCN, and TiN. Designated grade TP40, this insert is engineered for negative rake cutting and features an 80-degree diamond shape with a T-Land cutting edge style. The inscribed circle measures 0.5 inches and the corner radius is 0.0315 inches. With four cutting edges per insert and compatibility with clamp, pin, and lever lock holding methods, it is suited for high-productivity turning operations. Licensed machinists and CNC operators working on steel and stainless steel applications are the primary installers of this insert.

This insert is designed for use in boring, facing, and turning applications on primary workpiece materials including steel and stainless steel, corresponding to ISO material codes P and M. The MR7 chip breaker geometry controls chip flow during medium to roughing cuts. The insert measures 0.5079 inches in length and 0.1874 inches in thickness, with a maximum depth of cut of 0.4764 inches. It is identified by ISO code CNMG120408-MR7 and conforms to both ANSI and ISO standards, making it interchangeable across toolholders built to those specifications.

Key Features

• Multilayer CVD coating: TiC, TiCN, and TiN for wear and heat resistance in steel cutting
• 80-degree diamond insert shape with T-Land cutting edge for strength and edge stability
• Four usable cutting edges per insert for extended tool life and cost efficiency
• MR7 chip breaker geometry suited for boring, facing, and turning operations
• Negative rake geometry and N clearance code for robust interrupted and continuous cuts
• Compatible with clamp, pin, and lever lock holding systems for versatile toolholder fitment

Compatibility

Conforms to ANSI and ISO standards for CNMG432 series inserts (ISO equivalent CNMG120408-MR7). Designed for toolholders with clamp, pin, or lever lock holding methods sized for the CNMG insert family. Material grades P40, M35, and M40 indicate suitability for steel and stainless steel workpieces.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Always power down and lock out the machine before indexing or replacing inserts. Seat the insert fully in the pocket and torque the clamping screw to the toolholder manufacturer's specification. Inspect the insert pocket and clamp for wear or damage before seating a new insert to ensure proper edge presentation and repeatability.