Accupro B120700R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B120700R is a corner radius boring bar designed for precision internal boring operations in machine shop and CNC turning environments. Manufactured from submicron solid carbide with a bright finish, this bar delivers tight tolerances and smooth surface finishes in small-bore applications. It cuts in the right-hand direction with a minimum bore diameter of 0.12 inches and a maximum bore depth of 0.7 inches. The 3/16-inch shank diameter and 2-inch overall length make it well-suited for compact setups and smaller lathes or boring heads. Licensed machinists and CNC operators handling precision workholding and finish-bore operations are the primary users of this tooling.

The B120700R is applied in finish boring and contouring operations where a controlled corner radius is required at the base of a bore. The corner radius range of 0.005 to 0.008 inches reduces stress concentrations at bore shoulders and produces cleaner transitions in precision-machined components. Typical applications include die and mold work, hydraulic component bores, and tight-tolerance shaft fits in both job shop and production environments. The right-hand cutting direction is standard for conventional lathe and CNC turning center setups.

Key Features

• Submicron solid carbide construction for improved wear resistance and edge retention in hard or abrasive materials
• Bright finish coating maintains dimensional accuracy without added coating thickness variation
• Corner radius range of 0.005 to 0.008 inches for controlled shoulder transitions in precision bores
• Minimum bore diameter of 0.12 inches enables work in very small internal diameters
• Maximum bore depth of 0.7 inches suits shallow to moderate internal features
• 3/16-inch shank diameter fits standard small-bore toolholders and boring heads

Compatibility

Designed as an OEM-style replacement and standard fit for toolholders and boring heads accepting a 3/16-inch round shank boring bar in right-hand cutting configurations.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be fully stopped and the control placed in an e-stop or locked-out state before inserting or removing tooling. Secure the shank firmly in the toolholder to the specified clamping torque for your holder type, and verify runout with a dial indicator before taking a finishing pass. Follow shop safety protocols and applicable OSHA machine guarding requirements when operating boring tooling.