Accupro ACC-BBL2901250 Boring Bar Left Hand Solid Carbide

Product Description

The ACCUPRO ACC-BBL2901250 is a left-hand cut boring bar machined from submicron-grade solid carbide. It is designed for internal boring operations on CNC lathes, manual lathes, and boring mills where precise, tight-tolerance holes are required. The bar features a 5/16-inch shank diameter and a 2.5-inch overall length, making it well suited for short-reach applications. With a minimum bore diameter of 0.29 inches and a maximum bore depth of 1.25 inches, it handles small-diameter finish boring where rigidity and vibration resistance are critical. A bright finish coating is standard. This tool is installed and used by machinists and toolroom professionals.

This boring bar is appropriate for small-bore finishing and semi-finishing cuts in ferrous and non-ferrous materials where high dimensional accuracy is required. Left-hand cutting direction suits applications where conventional right-hand tooling cannot be used due to workholding orientation or machine configuration. It is commonly used in production environments, job shops, and toolrooms performing precision internal diameter work on lathes or boring machines. The submicron carbide grade provides elevated hardness and wear resistance for demanding cutting conditions.

Key Features

• Submicron-grade solid carbide construction for superior hardness and wear resistance
• Left-hand cutting direction for applications requiring reverse-orientation boring
• 0.29-inch minimum bore diameter enables small-hole internal machining
• 1.25-inch maximum bore depth suitable for short-reach precision boring
• 5/16-inch shank diameter for standard toolholder compatibility
• Bright finish coating for visual inspection of cutting edge condition

Compatibility

Designed for use in standard boring bar toolholders accepting a 5/16-inch round shank. Suitable for lathes, CNC turning centers, and boring machines configured for left-hand cutting tools.

Installation Notes

This tool is installed by machinists and toolroom personnel. Secure the shank fully within the toolholder to the recommended minimum clamp depth before beginning any cuts. Ensure the machine spindle is fully stopped and the machine is placed in a safe lockout state before changing or adjusting tooling. Do not exceed the tool's rated maximum bore depth, and avoid side-loading the bar beyond the intended cutting geometry.