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The ACCUPRO B1801000R is a corner radius 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 coating, it delivers the rigidity and wear resistance required for tight-tolerance bore work. The bar accepts a minimum bore diameter of 0.18 inches and cuts to a maximum bore depth of 1 inch. A corner radius range of 0.005 to 0.008 inches allows the tool to produce controlled edge breaks and blended transitions at the bottom of bored features. Licensed machinists and CNC operators use this bar where consistent finish and dimensional repeatability are critical.
This boring bar is suited for small-diameter internal turning applications in precision machining environments, including aerospace, medical device, and general metalworking shops. With a 0.25-inch shank diameter and an overall length of 2.5 inches, it fits compact tool holders used on small-bore lathes and Swiss-style machines. The right-hand cutting direction is standard for conventional spindle rotation setups. Its submicron carbide grade performs in both ferrous and non-ferrous materials where tool deflection and surface finish are primary concerns.
Designed as an OEM-style replacement and standard tooling option for 0.25-inch shank boring bar tool holders used in small-bore CNC lathe and turning center applications.
Installation and setup should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before inserting or adjusting the boring bar in its holder. Ensure the shank is seated squarely and clamped to the holder manufacturer's specified torque using appropriate hex keys before taking any cuts. Follow shop safety protocols and machine tool manufacturer guidelines when setting tool offsets and cutting parameters.
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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