Sandvik Coromant 5730993 Turning Insert DCMT21.52-MM 1125

Product Description

The SANDVIK COROMANT 5730993 is a solid carbide turning insert in DCMT style, designed for precision metal cutting on CNC lathes and turning centers. It carries a dual-layer TiAlN and AlCr2O3 coating under the manufacturer grade 1125, which supports high-speed and interrupted-cut finishing applications. The insert features a 55-degree diamond shape with a 7-degree relief angle and a 1/32-inch corner radius, making it well-suited for finishing passes where tight tolerances and fine surface finish are required. Machining professionals and CNC tooling technicians install this insert as part of an indexable toolholder system using a screw-clamp holding method.

This insert is appropriate for finishing and light semi-finishing operations on steel, stainless steel, and similar alloy workpieces in both production and job-shop environments. The MM chip breaker geometry aids in chip control during low-to-moderate depth-of-cut passes. It fits standard DCMT-compatible screw-on toolholders and is commonly used in ISO-designated external turning applications. The ISO code for this insert is DCMT 07 02 08-MM 1125, which can assist in cross-referencing with compatible toolholder systems.

Key Features

• Solid carbide substrate with TiAlN and AlCr2O3 dual-layer coating for heat and wear resistance
• 55-degree diamond insert shape provides a sharp, low-force cutting geometry for finishing cuts
• 1/32-inch corner radius suitable for fine surface finish and close-to-shoulder turning
• MM chip breaker geometry supports controlled chip evacuation at moderate feed rates
• Screw-clamp holding method ensures secure, repeatable seating in compatible toolholders
• 7-degree relief angle reduces flank friction on precision finish passes

Compatibility

Designed for use in DCMT-style indexable turning toolholders accepting a 1/4-inch inscribed circle insert with screw-clamp retention. The ISO code DCMT 07 02 08-MM 1125 can be used to identify compatible holders in standard ISO toolholder catalogs.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key to secure the clamp screw to the toolholder manufacturer's specified seating procedure without overtightening, which can crack the carbide substrate. Inspect the insert pocket and clamp for debris or damage before seating a new insert.