Accupro B2901250R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B2901250R is a corner radius boring bar engineered for precision internal machining operations. Constructed from submicron solid carbide with a bright finish coating, this bar delivers the rigidity and edge retention required for tight-tolerance bores. It accommodates a minimum bore diameter of 0.29 inches and reaches a maximum bore depth of 1.25 inches. The right-hand cutting direction suits standard boring head setups on CNC machining centers, lathes, and manual mills. A 5/16-inch shank diameter and 2.5-inch overall length make it a compact, high-performance tool for close-quarters internal finishing work.

This boring bar is suited for shops performing precision internal turning, counterboring, or finish boring in ferrous and non-ferrous materials. The corner radius range of 0.005 to 0.008 inches allows the operator to produce a controlled radius blend at the base of a bore, eliminating sharp corners that can act as stress risers in machined components. Typical applications include toolrooms, production machining cells, and prototype shops where dimensional accuracy in small-diameter bores is critical. A licensed machinist or CNC operator is the expected end user.

Key Features

• Submicron solid carbide construction for superior hardness and wear resistance
• Bright finish coating for reduced friction and clean chip evacuation
• Corner radius range of 0.005 to 0.008 inches for controlled edge blending
• Minimum bore diameter of 0.29 inches suits small, tight-tolerance applications
• Right-hand cut configuration compatible with standard boring setups
• Compact 2.5-inch overall length with 5/16-inch shank for rigid tooling setups

Compatibility

Designed as a direct-fit boring bar for standard 5/16-inch shank boring head holders used in CNC and manual machining applications requiring right-hand internal cutting.

Installation Notes

Installation should be performed by a qualified machinist following standard toolroom practices. Ensure the machine spindle is fully stopped and the tool holder is clean and free of chips before seating the shank. Verify shank clamp torque per the boring head manufacturer specification and confirm tool runout with a dial indicator before beginning a cut. Solid carbide tooling is brittle and should not be subjected to interrupted cuts or excessive overhang beyond the rated bore depth.