Sandvik Coromant 5721942 Indexable Boring Bar Coroturn 107

Product Description

The SANDVIK COROMANT 5721942 is an indexable boring bar from the CoroTurn 107 series, designed for internal turning operations in metal-cutting applications. Built from steel with a 5/8-inch shank diameter and an 8-inch overall length, this right-hand holder uses screw clamping to secure a single VBMT 221 insert. The toolholder style is A-SVUB with a neutral rake angle, making it well-suited for consistent, stable cutting with minimal setup variation. Coolant-through capability supports chip evacuation and tool life in demanding bore finishing work. Licensed HVAC and plumbing trades do not install this part — it is a machinist and metalworking tool used in CNC and manual lathe operations.

This boring bar is used for internal boring, profiling, and turning operations on CNC lathes and manual turning centers. It is appropriate for shops machining small-bore features where a minimum bore diameter of 0.85 inches (21.6 mm) is required. The A-SVUB toolholder style and VBMT 221 insert compatibility make this bar a standard fit in job shops, OEM production environments, and maintenance machining operations where consistent insert indexing and repeatability are required.

Key Features

• CoroTurn 107 series A-SVUB toolholder style for internal boring, profiling, and turning
• Minimum bore diameter of 0.85 inches (21.6 mm) for small-bore internal operations
• Right-hand cut orientation with neutral rake and 0-degree lead angle
• Screw clamping insert retention for secure, repeatable indexing of VBMT 221 inserts
• Coolant-through design aids chip control and thermal management at the cutting zone
• Steel construction with 5/8-inch shank diameter and 8-inch overall length

Compatibility

Designed for use with VBMT 221 series inserts. Insert inscribed circle is 3/8 inch (0.375 inches). Multi-use tool compatible with boring, profiling, and turning applications on lathes accepting a 5/8-inch shank toolholder.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician on a lathe or turning center. Power down and lock out the machine before inserting or indexing the cutting insert. Verify shank fitment and tool projection against the machine turret specifications before operation. Follow the toolholder manufacturer guidelines for insert torque and clamping sequence to avoid insert movement during cutting.