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The ACCUPRO ACC-BB230500 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 the rigidity and edge retention needed for tight-tolerance bores in ferrous and non-ferrous materials. The right-hand cutting direction suits standard lathe setups, and the 5/16-inch shank diameter fits common boring bar holders. Minimum bore diameter is 0.23 inches, maximum bore depth is 0.5 inches, and overall length is 2.5 inches. Machinists and toolroom technicians use this bar where small-diameter, shallow bores demand consistent dimensional accuracy.
This boring bar is suited for small-bore applications in production machining, job shop work, and toolroom operations. It handles finish and semi-finish passes in bores starting at 0.23 inches, making it a practical choice for tight clearance holes, bearing pockets, and precision fit bores in both short-run and production environments. The compact overall length of 2.5 inches keeps overhang minimal, which supports chatter-free cuts in shallow bore depths up to 0.5 inches.
Designed as an OEM-style replacement or direct tooling addition for standard boring bar holders accepting a 5/16-inch shank diameter on CNC lathes and manual turning centers.
A qualified machinist or toolroom technician should install and set this boring bar. Ensure the machine spindle is fully stopped and locked out before mounting or adjusting the bar in the toolholder. Secure the shank firmly in the holder to the manufacturer-recommended clamping procedure to prevent movement under cutting loads. Inspect the cutting edge for chips or wear before each use, as carbide is brittle and a damaged edge can affect bore quality and tolerances.
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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