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The ACCUPRO ACC-BB2901750 is a solid carbide boring bar designed for precision internal boring operations on CNC and manual lathes. Constructed from submicron-grade solid carbide with a bright finish, this bar delivers consistent cutting performance in tight-tolerance applications. It supports a minimum bore diameter of 0.29 inches and reaches a maximum bore depth of 1.75 inches, making it well-suited for shallow to mid-depth internal features. The 5/16-inch shank diameter and 3-inch overall length provide a compact, rigid setup that resists deflection during cut. Machinists and toolroom technicians install this bar in standard boring bar holders or toolpost setups.
This boring bar is used in machine shops, toolrooms, and production environments where accurate internal diameters are required. It is appropriate for ferrous and non-ferrous materials where submicron carbide grade provides the necessary hardness and edge retention. The right-hand cutting direction suits the standard spindle rotation on most lathes. Typical applications include finish boring of small-diameter holes in turned components, fixtures, and machined parts requiring close dimensional tolerances.
Designed as an OEM-style replacement and standard-fit boring bar for toolpost holders and boring bar blocks accepting a 5/16-inch round shank.
Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before mounting or adjusting the boring bar. Secure the shank firmly in the toolholder to the full recommended engagement depth to minimize overhang and reduce vibration. Verify bore alignment and test with a light finishing pass before committing to full depth cuts.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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