Accupro ACC-BB290900 Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO ACC-BB290900 is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and manual turning centers. Built from submicron-grade carbide with a bright finish, it delivers consistent dimensional accuracy in small-bore applications. The right-hand cutting direction and 5/16-inch shank diameter make it a direct-fit tool for standard boring bar holders. With a minimum bore diameter of 0.29 inches and a maximum bore depth of 0.9 inches, this bar handles tight-tolerance work in small-diameter features where rigidity and tool geometry are critical.

This boring bar is suited for production machining and toolroom applications where close tolerances are required in small internal diameters. It is commonly installed in CNC turning centers, manual lathes, and live-tool setups by machinists and tooling technicians working in metal cutting environments. The compact overall length of 2.5 inches allows use in constrained setups with limited Z-axis clearance.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in precision boring
• Bright finish coating for reduced friction and improved chip flow
• Right-hand cutting direction for standard boring bar holder configurations
• 0.29 inches minimum bore diameter for small-diameter internal features
• 0.9 inches maximum bore depth for adequate reach in typical small-bore applications
• 5/16-inch shank diameter fits standard boring bar sleeves and holders

Compatibility

Designed as an OEM-style replacement and standard-fit boring bar for CNC lathe and manual turning setups using 5/16-inch boring bar holders or sleeves.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and the machine is powered down or in a safe-mode state before changing tooling. Secure the shank firmly in the boring bar holder to the recommended clamping torque specified by the holder manufacturer. Verify runout and tool offset settings before taking the first cut.