Accupro ACC-BBL290500 Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO ACC-BBL290500 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 tight dimensional control in small-bore applications. The left-hand cutting direction suits specific tooling orientations and back-boring setups. With a minimum bore diameter of 0.29 inches and a maximum bore depth of 0.5 inches, this bar is suited for shallow, tight-tolerance bores where rigidity and tool geometry are critical. Machinists and toolroom technicians working in production or job-shop environments rely on this class of bar for consistent, repeatable results.

This boring bar is intended for use in metalworking applications requiring small internal diameter finishing or semi-finishing cuts. Its 5/16-inch shank diameter fits standard boring bar holders and quick-change tooling systems commonly found on CNC and manual lathes. The left-hand cut configuration makes it appropriate for right-to-left feed direction setups or reverse-spindle operations. It is suited for ferrous and non-ferrous materials where carbide tooling is the correct choice for surface finish and tool life.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in small-bore work
• Left-hand cutting direction for back-boring and reverse-feed setups
• Minimum bore diameter of 0.29 inches accommodates tight internal geometries
• Maximum bore depth of 0.5 inches suits shallow through and blind bore applications
• Bright finish coating on cutting geometry
• 5/16-inch shank diameter fits standard lathe boring bar holders

Compatibility

Designed as an OEM-style replacement or direct-fit boring bar for standard 5/16-inch boring bar holders used on CNC and manual turning centers.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the shank firmly in the boring bar holder to the full recommended grip length to minimize overhang and chatter. Ensure the lathe spindle is at a complete stop and all power is locked out before changing tooling. Confirm cutting direction and spindle rotation are matched to the left-hand geometry before initiating a cut.