Sandvik Coromant 5730451 Turning Insert DCGT21.51-UM 1125

Product Description

The SANDVIK COROMANT 5730451 is a solid carbide turning insert designed for precision external turning operations on CNC lathes and turning centers. It carries the DCGT21.51-UM 1125 designation, indicating a 55-degree diamond insert shape with a neutral hand orientation and a UM chip breaker geometry optimized for light to medium finishing cuts. The insert is coated with TiAlN and AlCr2O3 via a PVD process, delivering heat resistance and wear protection suited to steel and stainless steel applications. With a 1/4-inch inscribed circle and a 1/64-inch corner radius, this insert is built for close-tolerance finishing work where surface finish and dimensional accuracy are critical.

This insert is engineered primarily for turning steel workpieces and is rated for secondary use on stainless steel, non-ferrous metals, superalloys, and titanium. It fits the SANDVIK COROMANT CoroTurn 107 tooling system and is held in place by a screw-clamp method. Typical applications include external longitudinal turning and facing on small-diameter components where chip control and cutting-edge precision are essential. It is used by machinists and CNC operators in production and job-shop environments handling a wide range of ferrous and non-ferrous materials.

Key Features

• 55-degree diamond insert shape provides a versatile approach angle for external turning and facing
• TiAlN and AlCr2O3 PVD coating improves heat resistance and edge wear life across multiple workpiece materials
• UM chip breaker geometry designed for light finishing cuts with reliable chip control
• Neutral hand orientation accommodates standard right-hand and left-hand toolholder setups
• 1/64-inch corner radius supports tight tolerances and fine surface finish requirements
• Screw-clamp insert holding method ensures secure seating and repeatable edge indexing

Compatibility

Designed for use in the SANDVIK COROMANT CoroTurn 107 tooling system. ISO designation DCGT 07 02 04-UM 1125 can be used to cross-reference compatible toolholders within that system family.

Installation Notes

Insert installation and indexing should be performed by a qualified machinist or CNC setup technician. Power down the machine and engage all locks before handling inserts or adjusting toolholders. Use the appropriate Torx or hex key for the screw-clamp fastener as specified by the toolholder manufacturer. Inspect the insert pocket for debris or damage before seating a new insert to ensure proper edge registration and prevent premature breakage.