Sandvik Coromant 5723970 Turning Insert CCMT21.51-MM 1125

Product Description

The SANDVIK COROMANT 5723970 is a solid carbide turning insert in the CoroTurn 107 series, designed for external and internal turning operations on CNC lathes and turning centers. This CCMT-style insert features a TiAlN and AlCr2O3 PVD coating that improves wear resistance and thermal stability during continuous cutting passes. The 80-degree diamond shape provides a strong cutting edge geometry suited for profiling and finishing cuts. With a neutral hand orientation and an MM chip breaker, this insert is primarily targeted at steel and stainless steel workpiece materials. It is installed and changed by CNC machinists and tool-and-die professionals as part of routine insert indexing on screw-clamped toolholders.

This insert is specified for primary use on steel workpieces and secondary use on stainless steel, covering a wide range of turning applications in general machining, production turning, and light finishing operations. The MM chip breaker geometry is engineered for medium cutting conditions where chip control is critical. The CoroTurn 107 series is a screw-clamped insert system intended for light to medium-duty turning with close tolerances. The ISO designation for this insert is CCMT 06 02 04-MM 1125, which can assist in cross-referencing with compatible toolholders and systems.

Key Features

• Solid carbide substrate with TiAlN and AlCr2O3 PVD dual-layer coating for extended tool life in steel turning
• 80-degree diamond insert shape (Shape Code C) with 7-degree relief angle for stable edge engagement
• MM chip breaker geometry optimized for medium cutting conditions and chip control
• Neutral hand orientation fits standard CCMT screw-clamped toolholder pockets
• 1/64-inch (0.0156-inch) corner radius for finishing and light profiling passes
• 2 cutting edges per insert for cost-effective indexing

Compatibility

Designed for use in screw-clamped CCMT toolholders compatible with the CoroTurn 107 series. ISO designation CCMT 06 02 04-MM 1125 can be used to verify toolholder pocket compatibility. Primary workpiece material is steel (ISO Code P); secondary workpiece material is stainless steel (ISO Code M).

Installation Notes

Insert indexing and replacement is performed by qualified machinists following machine shop lockout and energy isolation procedures before accessing the turret or toolholder. Use the appropriate Torx or hex key to release and re-seat the clamping screw to the toolholder manufacturer's specified procedure. Inspect the toolholder pocket seating surface for wear or debris before seating the new insert. Do not force the insert into the pocket; proper seating ensures edge geometry accuracy and safe clamping.