Sandvik Coromant 5721836 Indexable Boring Bar 3/4in Shank

Product Description

The SANDVIK COROMANT 5721836 is an indexable boring bar from the CoroTurn 107 series, designed for internal turning and bore finishing operations on CNC lathes and turning centers. Built from steel with a 3/4 inch shank diameter and a minimum bore diameter of 1.0118 inches, this right-hand-cut holder accepts VBMT 11 03 04 inserts secured by a screw clamping method. The 10 inch overall length and neutral rake angle make it well suited for stable, consistent cuts in a range of bore diameters. Coolant-through capability supports chip evacuation and tool life in demanding applications.

This boring bar is used in precision internal turning applications in both production and job-shop environments. The CoroTurn 107 series is a common choice for residential machining shops, contract manufacturers, and industrial maintenance crews performing bore sizing, finishing, and light roughing on steel, cast iron, and similar materials. The -3 degree lead angle and 0.580 inch center-to-cutting-edge measurement suit it to close-tolerance bore work where controlled entry geometry matters.

Key Features

• Minimum bore diameter of 1.0118 inches for internal turning applications
• Right-hand cut with neutral rake angle for broad material compatibility
• Screw clamping method ensures secure insert retention during cuts
• Coolant-through design aids chip removal and extends insert life
• Compatible with VBMT 11 03 04 inserts for flexible tooling inventory
• Multi-use tool designation supports varied boring and turning tasks

Compatibility

Accepts VBMT 11 03 04 inserts. Toolholder style is A..SVUBR/L, part of the SANDVIK COROMANT CoroTurn 107 series.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and the turret is indexed to a safe position before changing inserts or setting tool offsets. Use a calibrated torque wrench when tightening the screw clamp to the insert per the toolholder manufacturer's recommended procedure. Verify bore diameter and tool projection with a bore gauge before running production cuts.