Sandvik Coromant 5740623 Rcmt 12 04 M0-SM 1125 Turning Insert

Product Description

The SANDVIK COROMANT 5740623 is a round carbide turning insert in the CoroTurn 107 series, designed for precision external and internal turning operations. It carries the ISO designation RCMT 12 04 M0-SM 1125 and features a dual-layer PVD coating of TiAlN and AlCr2O3 for extended tool life in demanding cutting conditions. The insert has a 12 mm inscribed circle, a thickness of 0.1875 inches (3/16 inches), and four usable cutting edges. It is intended for use by machinists and CNC turning specialists working with difficult-to-machine materials.

This insert is engineered primarily for stainless steel (ISO material code M) and is rated as a secondary choice for superalloys and titanium (ISO material code S). The SM chip breaker geometry is suited for light to medium finishing passes where chip control and surface finish are critical. The screw-holding method and C clearance code make it compatible with standard CoroTurn 107 toolholders. It is a neutral-hand insert, usable in both right- and left-hand setups depending on holder orientation.

Key Features

• Round insert shape (RCMT) with 4 cutting edges for maximum economy per insert
• PVD-applied TiAlN and AlCr2O3 dual-layer coating for heat and wear resistance
• SM chip breaker geometry optimized for finishing on stainless steel
• 12 mm inscribed circle with 4.40 mm hole diameter for screw-on mounting
• 7-degree relief angle (clearance code C) reduces cutting forces on thin-wall workpieces
• Grade 1125 carbide substrate rated for stainless steel, superalloy, and titanium applications

Compatibility

Designed for use with SANDVIK COROMANT CoroTurn 107 series toolholders that accept RCMT 12 04 style inserts with screw clamping. Suitable for stainless steel (M) and superalloy and titanium (S) workpiece materials per ISO classification.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before changing inserts. Use the correct Torx or hex key specified for the CoroTurn 107 holder to seat and torque the clamping screw — do not overtighten, as this can chip the insert seat. Inspect the insert pocket and seating surface for debris or wear before indexing to a fresh cutting edge.