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The ACCUPRO ACC-BB230400G is a solid carbide boring bar designed for precision internal boring operations on CNC lathes, manual lathes, and boring machines. Built from micrograin solid carbide with a titanium nitride (TiN) finish coating, it delivers consistent cutting performance and extended tool life in ferrous and non-ferrous materials. The right-hand cutting geometry suits the majority of standard lathe setups. With a minimum bore diameter of 0.23 inches and a maximum bore depth of 0.4 inches, this bar is suited for small-diameter, tight-tolerance applications where rigidity and surface finish quality matter. Machinists and toolroom professionals will find it a reliable choice for production and repair work.
This boring bar is intended for use in precision machining environments, including job shops, production facilities, and toolroom applications. Its 5/16-inch shank diameter fits standard boring bar holders and quick-change toolpost systems commonly found on small to mid-size lathes. The 2.5-inch overall length provides the clearance needed for most typical setups in this bore-diameter class. It is appropriate for both CNC and manual machine operation where fine bore sizing and finish are required.
Designed as an OEM-style replacement and standard fit for boring bar holders accepting a 5/16-inch shank diameter, suitable for small-diameter internal boring operations on CNC and manual lathes.
Installation should be performed by a qualified machinist following the machine tool manufacturer's setup procedures. Secure the shank firmly in the boring bar holder to the recommended clamping depth before operation. Ensure the machine spindle is fully stopped and locked before changing or adjusting tooling. Verify bore alignment and tool height before taking initial 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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