Accupro ACC-TBB312 Boring Bar Right Hand Micrograin

Product Description

The ACCUPRO ACC-TBB312 is a solid micrograin carbide boring bar designed for internal diameter turning and boring operations on lathes and machining centers. With a minimum bore diameter of 0.413 inches and a maximum bore depth of 2.5 inches, it handles tight-tolerance work in small-diameter bores. The 5/16-inch shank diameter and 5-inch overall length make it suitable for compact toolholders and CNC turret setups. The bright finish coating and micrograin carbide grade deliver consistent performance in ferrous and non-ferrous materials. This bar is installed by machinists and tool-and-die professionals in production and job-shop environments.

The ACC-TBB312 is suited for internal boring applications in both manual lathe and CNC turning center setups. Its right-hand cutting direction is standard for conventional boring operations where the spindle rotates counterclockwise as viewed from the tailstock. The compact shank and short-to-medium bore depth range make it a practical choice for small-part work, fixture boring, and precision hole finishing where close dimensional control is required.

Key Features

• Micrograin carbide construction for wear resistance and edge retention
• Minimum bore diameter of 0.413 inches for small-diameter internal work
• Maximum bore depth of 2.5 inches suits a wide range of part geometries
• 5/16-inch shank diameter fits standard small-bore toolholders
• Right-hand cut configuration for conventional lathe and CNC turning operations
• Bright finish coating for smooth chip flow and reduced built-up edge

Compatibility

Designed as an OEM-style boring bar for use in standard 5/16-inch shank boring bar holders on manual lathes and CNC turning centers.

Installation Notes

Boring bars of this type are installed and set by qualified machinists following shop safety protocols. Secure the shank fully in the toolholder to minimize overhang and reduce vibration before taking any cuts. Ensure the machine spindle is fully stopped and locked out before changing or adjusting tooling. Follow the machine tool manufacturer guidelines and applicable ANSI machining standards for setup and operation.