Accupro ACC-BBL4902750 Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO ACC-BBL4902750 is a left-hand cut boring bar machined from submicron-grade solid carbide with a bright finish coating. It is designed for precision internal boring operations on CNC lathes, manual lathes, and boring mills. The bar accepts a minimum bore diameter of 0.49 inches and reaches a maximum bore depth of 2.75 inches, making it well suited for moderate-depth finish and semi-finish boring work. The 1/2-inch shank diameter and 4-inch overall length fit standard toolholders commonly found in production and job-shop environments. Machinists and CNC operators install and qualify this tooling.

This boring bar is applied in ferrous and non-ferrous material machining where dimensional accuracy and surface finish consistency are required. Left-hand cut geometry suits specific spindle rotation setups and back-boring applications where a right-hand bar cannot engage the workpiece correctly. The submicron carbide substrate provides wear resistance suited to continuous cutting passes at tighter tolerances. It is appropriate for use in both production and prototype machining contexts where repeatable bore geometry is critical.

Key Features

• Submicron-grade solid carbide substrate for extended tool life and dimensional consistency
• Left-hand cutting direction for back-boring and reverse-spindle applications
• Minimum bore diameter of 0.49 inches enables access to small-bore workpieces
• Maximum bore depth of 2.75 inches (2-3/4 inches) for moderate-depth internal features
• Bright finish coating — no added coating buildup that would affect shank fitment tolerances
• 1/2-inch shank diameter fits standard boring bar toolholders and quick-change systems

Compatibility

Designed as a replacement or addition to standard boring bar sets for lathes and boring mills accepting a 1/2-inch shank diameter toolholder.

Installation Notes

This tooling is installed by machinists and CNC setup technicians. Power down and lock out the machine spindle before changing or adjusting boring bar toolholders. Secure the shank fully within the toolholder to the manufacturer-specified engagement depth and confirm runout with a dial indicator before cutting. Verify that left-hand cutting geometry matches the intended spindle rotation direction before initiating a bore pass.