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The MICRO 100 BB-230900G is a solid carbide boring bar designed for internal diameter machining in metalworking and precision machining applications. It features a minimum bore diameter of 0.2300 inches and a maximum bore depth of 0.9000 inches, making it well suited for small-bore finishing and semi-finishing operations. The 5/16-inch shank diameter provides rigid tool holding in standard boring bar holders. With an overall length of 2.5 inches and a corner radius of 0.0060 inches, this bar delivers consistent, repeatable results in tight-tolerance bores. Solid carbide construction provides the hardness and wear resistance required for demanding cuts in steel, cast iron, and non-ferrous materials.
This boring bar is intended for use in CNC lathes, manual lathes, and machining centers where small-diameter internal boring is required. The right-hand cutting direction suits standard spindle rotation in most turning setups. It is a practical choice for tool and die shops, production machining environments, and general precision shops handling close-tolerance bore work. The 0.0060-inch corner radius is appropriate for finishing passes where a fine surface finish and accurate bore geometry are priorities.
Designed as an OEM-style replacement and standard fit for boring bar holders accepting a 5/16-inch shank diameter in CNC and manual turning applications.
Installation and tool changes should be performed by a qualified machinist with the machine powered down and the spindle fully stopped. Secure the shank firmly in the tool holder to the holder manufacturer's recommended clamping specifications before operation. Verify bore alignment and tool overhang before initiating a cut, as excessive overhang beyond the rated bore depth can cause deflection and chatter. Follow applicable shop safety procedures when handling carbide tooling, as edges are extremely sharp.
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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