Accupro B290600R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B290600R is a corner radius boring bar designed for precision internal boring operations on CNC lathes and machining centers. Machined from submicron-grade solid carbide, it delivers the rigidity and wear resistance required for tight-tolerance bores. The bar handles a minimum bore diameter of 0.29 inches and a maximum bore depth of 0.6 inches. The 5/16-inch shank diameter and 2.5-inch overall length make it well-suited to compact toolholders. A bright finish coating keeps friction low during cutting. This tool is installed by machinists and CNC operators working in precision metalworking and toolroom environments.

The B290600R is used in production and toolroom machining where a controlled corner radius is required at the base of a bored feature. The corner radius range of 0.005 to 0.008 inches reduces stress concentrations in the workpiece bore, which is critical for components subject to cyclic loading. The right-hand cutting direction suits standard forward-turning setups on most CNC and manual lathes. Typical applications include bored housings, bushings, and precision-fit bores in ferrous and non-ferrous materials.

Key Features

• Submicron solid carbide construction for superior hardness and tool life
• Corner radius range of 0.005 to 0.008 inches reduces stress at bore root
• Minimum bore diameter of 0.29 inches suits small-diameter internal work
• Maximum bore depth of 0.6 inches accommodates typical shallow bore applications
• Bright finish coating minimizes built-up edge on non-ferrous materials
• 5/16-inch shank diameter fits standard boring bar toolholders

Compatibility

Designed as an OEM-style replacement and standard toolroom boring bar compatible with 5/16-inch boring bar holders used on CNC lathes and manual turning centers.

Installation Notes

Installation is performed by a qualified machinist or CNC operator. Before mounting, confirm the toolholder bore and set screws are clean and free of chips. Secure the shank to the minimum recommended overhang to reduce deflection and chatter. Follow machine tool manufacturer guidelines for clamping torque on the toolholder set screws.