Accupro ACC-BB290750G Boring Bar 0.290 in Micrograin Solid Carbide

Product Description

The ACCUPRO ACC-BB290750G is a solid carbide boring bar designed for precision internal bore operations on CNC and manual lathes. It features a micrograin carbide construction that delivers a fine cutting edge, improved wear resistance, and consistent dimensional accuracy. With a minimum bore diameter of 0.290 inches and a maximum bore depth of 0.75 inches, this bar handles tight, shallow bores where tool rigidity and surface finish are critical. The 5/16-inch shank diameter and 2.5-inch overall length suit compact tooling setups. Machinists and toolroom technicians install this bar in standard boring bar holders or quick-change tool posts for production and repair work.

This boring bar is suited for use in job shops, production machining facilities, and toolroom environments where small-diameter internal features require close tolerances and repeatable results. It operates in a right-hand cutting direction, making it compatible with standard lathe spindle rotation. Typical applications include finish boring of bushings, bearing bores, and small-diameter through or blind holes in ferrous and non-ferrous materials. It is sold individually and is appropriate for any operation demanding tight bore geometry and consistent tool life from a solid carbide insert-free design.

Key Features

• Micrograin solid carbide construction for superior edge retention and wear resistance
• Minimum bore diameter of 0.290 inches suits small, tight-clearance bore operations
• Maximum bore depth of 0.75 inches supports shallow through and blind bore applications
• Right-hand cutting direction for standard lathe spindle rotation
• 5/16-inch shank diameter fits common boring bar holders and quick-change tool posts
• Compact 2.5-inch overall length reduces overhang and improves rigidity

Compatibility

Designed as an OEM-style solid carbide boring bar for use in standard 5/16-inch boring bar holders on CNC and manual lathes performing small-diameter internal bore operations.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the shank firmly in the tool holder with the cutting edge set at the correct centerline height before engaging the workpiece. Ensure the machine spindle is fully stopped and all axes are at a safe position before mounting or adjusting the bar. Do not exceed the rated maximum bore depth, as excessive overhang or depth beyond tool capacity increases deflection and risk of tool breakage.