Sandvik Coromant 5721580 Indexable Boring Bar Coroturn 107

Product Description

The SANDVIK COROMANT 5721580 is an indexable boring bar from the CoroTurn 107 series, designed for internal turning, boring, and profiling operations on CNC lathes and turning centers. The bar features a 5/8-inch (15.88 mm) shank diameter and an overall length of 4.921 inches (125 mm). It uses a single DCMT 21.51 insert secured by screw clamping, with a positive rake geometry and a 3-degree lead angle that supports clean chip formation in a range of ferrous and non-ferrous materials. The steel body construction provides rigidity in tight-bore applications. Minimum bore diameter is 0.787 inches (20 mm).

This boring bar suits precision internal machining applications in job shops, production turning cells, and maintenance machining environments. It is compatible with multi-use operations including boring, profiling, and turning, making it a versatile toolholder for machinists and CNC operators working on components that require accurate internal diameters. The right-hand cutting orientation and coolant-through capability allow for effective chip evacuation in deep-bore and finish-bore operations. The center-to-cutting-edge dimension is 0.354 inches (9 mm), which is relevant for clearance planning in the bore setup.

Key Features

• CoroTurn 107 series with screw clamping for secure insert retention
• Coolant-through design for improved chip evacuation and tool life
• Positive rake geometry with 3-degree lead angle for reduced cutting forces
• Multi-use capable: boring, profiling, and turning from a single toolholder
• Uses DCMT 21.51 inserts with 1/4-inch (6.35 mm) inscribed circle
• Steel body construction for rigidity in small-bore applications

Compatibility

Designed for use with DCMT 21.51 inserts. Compatible with CNC lathes and turning centers that accept a 5/8-inch straight shank toolholder. Part of the SANDVIK COROMANT CoroTurn 107 series. Also referenced under manufacturer catalog number A10K-SDXCR 2-R.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom personnel. The machine spindle must be powered down and the machine placed in a safe lockout state before changing toolholders or inserts. Screw-clamped inserts should be seated and tightened using the appropriate Torx key per the toolholder manufacturer's standard procedure. Verify bore clearance and center-to-cutting-edge offset against part print requirements before initiating a cutting pass.