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The MICRO 100 QBB-050200X is a solid carbide boring bar designed for precision internal diameter machining on lathes and boring mills. It accepts a minimum bore diameter of 0.05 inches and reaches a maximum bore depth of 0.2000 inches (13/64 inches), making it well suited for tight, shallow bores where rigidity and dimensional accuracy are critical. The 3/16-inch shank diameter and 1.5-inch overall length keep the tool compact and stiff, minimizing deflection during the cut. Machinists and toolroom operators rely on solid carbide construction for superior wear resistance and the ability to hold tight tolerances in production or prototype environments.
This boring bar is intended for small-bore internal turning applications in metals and engineered plastics. Its right-hand cutting direction suits standard lathe setups where the spindle rotates counterclockwise when viewed from the tailstock. The compact overall length of 1.5 inches makes it a practical choice for CNC turning centers and manual lathes where tool overhang must be minimized to maintain surface finish and dimensional control.
Designed as an OEM-style replacement and standard tooling selection for small-bore internal turning applications on CNC and manual lathes equipped with tool holders accepting a 3/16-inch round shank.
Installation should be performed by a qualified machinist following the machine tool manufacturer's setup guidelines. Secure the shank firmly in the tool holder with minimal overhang to reduce vibration and deflection. Ensure the cutting edge is set to the correct centerline height before engaging the workpiece. Always power down and lock out the spindle before changing or adjusting tooling.
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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