Accupro ACC-BBL290600 Boring Bar Left Hand Solid Carbide

Product Description

The ACCUPRO ACC-BBL290600 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 machines where tight tolerances and surface finish are required. The bar features a 0.29-inch minimum bore diameter and a maximum bore depth of 0.6 inches, making it suited for small-diameter, shallow-bore applications. The 5/16-inch shank diameter and 2.5-inch overall length fit standard toolholders used in production and job-shop turning operations. Machinists and CNC operators install this bar when precision and rigidity in small-bore work are priorities.

This boring bar is intended for use in metalworking applications requiring left-hand cutting direction, which is common when boring from the back side of a feature or when tool clearance requires a non-standard approach. Typical applications include finishing passes on small bores in steel, cast iron, aluminum, and other machinable alloys. The submicron carbide grade provides the edge integrity needed for fine finishes and close-tolerance work in both production and prototype environments.

Key Features

• Submicron-grade solid carbide construction for superior rigidity and edge retention
• Left-hand cutting direction for back-boring and clearance-sensitive setups
• 0.29-inch minimum bore diameter suits small-diameter internal features
• 0.6-inch maximum bore depth for shallow-bore applications
• Bright finish coating with no added coating thickness to affect tolerances
• 5/16-inch shank diameter fits standard toolholding systems

Compatibility

Designed as an OEM-style replacement and standard fit for toolholders accepting a 5/16-inch round shank boring bar in CNC and manual lathe setups.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be fully stopped and locked out before mounting or adjusting the boring bar in the toolholder. Confirm shank seating and overhang are within the toolholder manufacturer recommendations to maintain rigidity and minimize chatter. Follow applicable shop safety procedures and machine tool manufacturer guidelines during setup.