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The ACCUPRO ACC-BB120350A is a micrograin solid carbide boring bar designed for precision internal boring operations on CNC and manual lathes and machining centers. It cuts in the right-hand direction and accepts a minimum bore diameter of 0.12 inches with a maximum bore depth of 0.35 inches. The 3/16-inch shank diameter and 2-inch overall length make it well suited for small-bore finish and semi-finish work where rigidity and dimensional accuracy are critical. A TiAlN finish coating provides heat resistance and extended tool life in ferrous and hardened materials. Machinists and toolroom professionals install and run this bar in production and job-shop environments.
This boring bar is applied in small-bore internal turning operations on lathes and machining centers where tight tolerances and smooth surface finishes are required. It is appropriate for both production runs and prototype work on ferrous metals, cast iron, and hardened alloys. The compact geometry supports use in confined bore entry conditions where larger shank tooling will not fit. Typical applications include bearing seats, bushings, valve bodies, and hydraulic component bores requiring close dimensional control.
Designed as an OEM-style boring bar for use in standard boring bar holders and collet chucks accepting a 3/16-inch round shank on CNC lathes, engine lathes, and machining centers.
Installation is performed by qualified machinists following standard toolroom practices. Secure the shank fully within the boring bar holder or collet chuck and verify runout before cutting. Ensure the machine spindle is fully stopped and locked out before mounting or removing the tool. Follow the machine manufacturer's guidelines and applicable shop safety codes for tool overhang and cutting parameter selection.
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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