Accupro B120500R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B120500R is a corner radius boring bar machined from submicron-grade solid carbide for precision internal boring operations. Designed for right-hand cutting, this bar produces a controlled corner radius ranging from 0.005 to 0.008 inches at the base of a bore, reducing stress concentrations in finished parts. The 3/16-inch shank diameter and 2-inch overall length make it suited for small-bore applications where rigidity and dimensional accuracy are critical. A bright finish coating is applied to the flute and shank surfaces. Licensed machinists and CNC tooling technicians typically install and run this bar on lathes, boring mills, and machining centers requiring fine internal geometry control.

This boring bar is intended for small-diameter internal turning where a radiused corner is required at the bore floor or step transition. With a minimum bore diameter of 0.12 inches and a maximum bore depth of 0.5 inches, it is well matched to tight-tolerance work in aerospace, medical, and precision mechanical component machining. The submicron carbide grade supports higher cutting speeds and longer tool life compared to standard carbide grades in abrasive or hardened workpiece materials.

Key Features

• Submicron solid carbide construction for enhanced wear resistance and edge retention
• Corner radius range of 0.005 to 0.008 inches for controlled stress-relief geometry at bore transitions
• Right-hand cutting direction compatible with standard lathe and boring mill spindle rotation
• Minimum bore diameter of 0.12 inches suitable for small and micro-bore applications
• Bright finish coating on shank and cutting surfaces
• 3/16-inch shank diameter with 2-inch overall length for compact tool holding setups

Compatibility

Designed as an OEM-style precision boring bar for use in tool holders and boring head systems that accept a 3/16-inch round shank, commonly found on manual lathes, CNC turning centers, and small boring mills.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully powered down and the tool turret or holder is locked before inserting or removing the boring bar. The bar should be clamped securely in a compatible tool holder with minimal overhang beyond the holder face to reduce chatter and deflection. Confirm corner radius requirements against part print tolerances before beginning the cut, as this bar produces a fixed radius range and cannot be adjusted after grinding.