Accupro ACC-BB290500 Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO ACC-BB290500 is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and manual turning centers. Built from submicron-grade carbide with a bright finish, it delivers consistent cutting performance in tight-tolerance bore applications. The right-hand cutting geometry and rigid 5/16-inch shank provide stable tool engagement with minimal deflection. With a minimum bore diameter of 0.29 inches and a maximum bore depth of 0.50 inches, this bar is suited for small-diameter, shallow-bore work where rigidity and dimensional accuracy are critical. Machinists and toolroom technicians rely on this tool class for finishing passes and close-tolerance sizing cuts.

This boring bar is intended for use on small-bore internal diameter turning applications in production and toolroom environments. Its submicron solid carbide construction makes it appropriate for harder workpiece materials where high-speed steel tooling would wear prematurely. Typical applications include bore finishing on hydraulic valve bodies, pneumatic components, and precision machined housings requiring tight roundness and surface finish tolerances. The 2.50-inch overall length keeps the tool compact and suitable for short-reach setups.

Key Features

• Submicron solid carbide construction for extended tool life in demanding materials
• Right-hand cutting direction for standard lathe spindle rotation
• Bright finish coating for smooth chip evacuation and reduced built-up edge
• 0.29-inch minimum bore diameter enables access to small internal diameters
• 0.50-inch maximum bore depth suited for shallow through and blind bore finishing
• 5/16-inch shank diameter fits standard boring bar holders and quick-change toolposts

Compatibility

Designed as a direct-fit replacement or supplemental boring bar for standard 5/16-inch boring bar holders used on CNC and manual lathes in toolroom and production machining applications.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine in a full stop, spindle off, and controls in a safe state before handling. Secure the shank firmly in the boring bar holder to the holder manufacturer's clamping specifications to prevent tool pull-out under cutting forces. Verify tool overhang is minimized to reduce deflection before taking finishing passes. Always verify bore diameter with calibrated gauging before committing to final depth of cut.