Sandvik Coromant 5721261 Indexable Boring Bar Coroturn 107

Product Description

The SANDVIK COROMANT 5721261 is an indexable boring bar from the CoroTurn 107 series, designed for internal boring and turning operations on CNC lathes and turning centers. The toolholder is machined from steel with a 0.5 inch (1/2 inch) shank diameter and a 6 inch overall length. It accepts a single TCMT 221 triangular insert secured by screw clamping, delivering a neutral rake angle of 0 degrees for stable, consistent cutting. The minimum bore diameter is 0.5984 inches (15.20 mm), making it suited to tight-bore applications. Coolant-through capability helps with chip evacuation and tool life in deep-bore conditions.

This boring bar is intended for use in precision machining environments where internal diameter finishing and light roughing are required. The right-hand cut orientation and A-STFC toolholder style are standard configurations for conventional lathe setups. The CoroTurn 107 series is a widely used platform in general turning and boring applications across both production and job-shop settings. Machinists working with ferrous and non-ferrous materials will find the neutral rake geometry versatile across a range of workpiece materials. The multi-use designation confirms suitability for both boring and turning operations within its bore range.

Key Features

• CoroTurn 107 series toolholder with screw-clamp insert retention for secure, repeatable positioning
• Coolant-through design supports chip flushing in deep or blind bore applications
• Neutral rake (0 degrees) geometry works across a broad range of materials
• Accepts TCMT 221 inserts with a 0.25 inch (1/4 inch) inscribed circle
• Right-hand cut orientation for standard lathe and turning center setups
• Steel construction provides rigidity in the 6 inch overhang range

Compatibility

Designed for use with TCMT 221 triangular inserts. Compatible with machines accepting a 0.5 inch shank boring bar. Suitable for both boring and turning operations per the multi-use application designation in the product specifications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety procedures. Ensure the machine spindle is fully stopped and the toolholder is locked out before changing inserts or mounting the bar. Secure the shank in the tool block or turret to the depth recommended by the machine manufacturer to maintain rigidity and minimize deflection. Verify insert seating and screw torque before resuming cutting operations.