Sandvik Coromant 5726129 Turning Insert Cpmt 2025 Carbide

Product Description

The SANDVIK COROMANT 5726129 is a solid carbide turning insert in the CoroTurn 111 series, designed for precision external and internal turning operations. It carries an ISO designation of CPMT 06 02 04-MM 2025 and features a CVD-applied multilayer coating of TiCN, Al2O3, and TiN in manufacturer grade 2025. The insert has a diamond (80-degree) shape with a neutral hand orientation, a 1/4-inch inscribed circle, and a corner radius of 1/64 inch (0.0156 inches). It is intended for professional machinists and CNC operators working in production or job-shop environments.

This insert is primarily suited for turning stainless steel workpieces, consistent with its primary workpiece material code M. The MM chip breaker geometry is engineered to manage chip control under moderate cutting conditions typical of stainless steel turning. It fits screw-clamping toolholders and is appropriate for both light and medium-duty passes on CNC lathes and turning centers. The 80-degree diamond shape provides two cutting edges per insert, offering a balance of strength and versatility across common turning applications.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• 80-degree diamond insert shape (C) with two usable cutting edges
• MM chip breaker geometry optimized for stainless steel workpiece materials
• 1/64-inch corner radius (0.0156 inches) for controlled surface finish
• Screw-clamping insert holding method for positive, repeatable seating
• Neutral hand orientation compatible with a wide range of toolholder setups

Compatibility

Designed for use in CoroTurn 111 series screw-clamp toolholders that accept CPMT-style inserts with a 1/4-inch inscribed circle and P clearance. Confirm toolholder acceptance of insert size code 21.51 and tolerance code M before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Seat the insert fully in the pocket and torque the clamping screw according to the toolholder manufacturer specification. Inspect the insert pocket and clamping screw for wear or damage before installing a new insert.