Accupro ACC-TBB250 Boring Bar Right Hand Micrograin

Product Description

The ACCUPRO ACC-TBB250 is a solid micrograin carbide boring bar designed for precision internal turning and bore finishing operations on metal lathes and machining centers. With a minimum bore diameter of 0.32 inches and a maximum bore depth of 2 inches, it handles tight-tolerance work in small-diameter bores. The 1/4-inch shank diameter and 4-inch overall length make it compatible with standard tool holders used in light to medium turning setups. The bright finish coating reduces friction and aids chip evacuation. This tool is installed and used by machinists, tool-and-die makers, and CNC lathe operators requiring consistent, repeatable bore geometry.

The ACC-TBB250 is suited for right-hand cut boring applications in ferrous and non-ferrous materials where bore accuracy and surface finish are critical. Typical applications include enlarging, finishing, and truing bored holes in workpieces held in chucks or fixtures on manual lathes, CNC turning centers, and boring mills. The compact shank size makes it well-matched to small-part machining environments and Swiss-style or sub-spindle setups where clearance is limited.

Key Features

• Micrograin carbide construction provides hardness and edge retention for extended tool life in precision boring
• Minimum bore diameter of 0.32 inches enables work in small, tight-tolerance bores
• Maximum bore depth of 2 inches suits a wide range of short to medium-depth internal turning passes
• Right-hand cut orientation for standard lathe and turning center setups
• Bright finish coating reduces built-up edge and improves chip flow
• 1/4-inch shank diameter fits common small-bore tool holders and blocks

Compatibility

Designed as a direct-fit replacement or addition for tool holders accepting a 1/4-inch shank diameter boring bar in manual lathe and CNC turning center applications.

Installation Notes

Installation is performed by machinists following standard tooling setup procedures. Secure the shank firmly in the tool holder, ensuring adequate overhang is minimized to reduce chatter and deflection. Power down and lock out the machine spindle before mounting or removing the boring bar. Follow the machine manufacturer guidelines and applicable shop safety codes when setting tool height and runout.