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The ACCUPRO ACC-BB4902000 is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and manual turning centers. Built from submicron-grade solid carbide with a bright finish, this bar delivers tight tolerances and surface finishes that high-speed steel tooling cannot match. It accepts a minimum bore diameter of 0.49 inches and reaches a maximum bore depth of 2 inches, making it suitable for a range of shallow-to-mid-depth bores. The 0.5 inch shank diameter fits standard ER and straight-shank tool holders. At 4 inches overall length, the bar offers a practical reach-to-rigidity ratio that minimizes chatter in typical turning setups. Machinists and toolroom technicians specify this bar for close-tolerance work in steel, aluminum, cast iron, and non-ferrous alloys.
This boring bar is intended for right-hand cutting applications in production and job-shop environments. It suits both CNC turning centers and manual lathes where repeatable bore sizing is required. Typical applications include finishing bores to final dimension after rough drilling, line-boring small housings, and producing smooth bore surfaces on pump bodies, bearing housings, and hydraulic manifold components. The submicron carbide grade provides wear resistance for extended tool life in continuous-cut conditions.
Designed as an OEM-style replacement and standard-fit boring bar for lathes and turning centers accepting a 0.5 inch straight shank toolholder. No specific model compatibility was provided in the product data.
Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the lathe is powered down before mounting or adjusting tooling. The shank must be clamped securely in the tool holder with adequate contact length to prevent deflection under cutting load. Avoid overhang beyond the minimum required for the bore depth, as excessive extension increases vibration and reduces surface finish quality.
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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