Sandvik Coromant 5740569 RCMT43 Carbide Turning Insert

Product Description

The SANDVIK COROMANT 5740569 is a round carbide turning insert in the RCMT43 style, designed for use in CoroTurn 107 toolholders on CNC lathes and turning centers. This insert carries a CVD-applied TiCN and TiN coating over a solid carbide substrate, designated manufacturer grade 235. The round insert shape provides a full 4 cutting edges, maximizing value per insert. At 0.1875 inches thick with a 0.5-inch inscribed circle, it suits a range of medium-duty turning applications. A screw-clamped holding method and standard M-tolerance geometry make it a direct fit for compatible CoroTurn 107 tooling systems. Installed by machinists and CNC operators in job shops and production environments.

This insert is engineered primarily for turning steel and stainless steel workpieces, covering ISO material groups P and M. The neutral hand orientation and round shape make it suitable for profiling, facing, and light to medium roughing passes. The CoroTurn 107 series is commonly used in positive-rake toolholder configurations on both manual and CNC turning equipment. The ISO designation for this insert is RCMT 12 04 00 235, and the chip breaker code is 00, indicating no chip breaker geometry. Typical applications include shaft turning, shoulder work, and contour turning on ferrous materials in both residential shop and industrial production settings.

Key Features

• Round RCMT insert shape with 4 usable cutting edges for extended tool life
• CVD-applied TiCN and TiN multilayer coating for wear resistance on steel and stainless steel
• Solid carbide substrate, manufacturer grade 235
• Screw-clamped holding method for secure, repeatable seating in CoroTurn 107 toolholders
• Neutral hand orientation supports profiling and multi-direction turning passes
• 7-degree relief angle (clearance code C) reduces flank wear in continuous cuts

Compatibility

Designed for use with SANDVIK COROMANT CoroTurn 107 series toolholders that accept RCMT43 round inserts with a screw-clamp holding method. ISO designation RCMT 12 04 00 235 confirms fitment in CoroTurn 107 holders specifying RCMT 12 04 geometry.

Installation Notes

Insert replacement should be performed with the machine fully powered down and the spindle locked. Use the appropriate Torx or hex key as specified by the toolholder manufacturer when tightening the clamping screw. Inspect the toolholder pocket and clamping screw for wear or damage before seating a new insert. Index or replace the insert when flank wear or chipping is observed to maintain dimensional accuracy and surface finish.