Accupro ACC-BBL140250 Boring Bar Left Hand Solid Carbide

Product Description

The ACCUPRO ACC-BBL140250 is a left-hand cut boring bar machined from submicron-grade solid carbide. It is designed for tight-tolerance internal boring operations on CNC lathes and manual turning centers. The bar handles a minimum bore diameter of 0.14 inches and a maximum bore depth of 0.25 inches, making it suited for small-diameter finish boring where rigidity and edge retention are critical. The 3/16-inch shank diameter and 2-inch overall length keep the tool compact for confined workpiece bores. The bright finish coating provides a clean surface that resists built-up edge on most workpiece materials.

This boring bar is intended for production and job-shop machining environments where small-bore precision is required. Typical applications include finishing pre-drilled or rough-bored holes in ferrous and non-ferrous materials on turning equipment. The left-hand cutting direction suits specific spindle orientations or back-boring setups where a standard right-hand bar cannot be used. Machinists and CNC setup technicians working with close-tolerance bore callouts will find the submicron carbide grade appropriate for maintaining dimensional accuracy across repeated passes.

Key Features

• Submicron solid carbide construction provides high hardness and edge retention in small-bore applications
• Left-hand cutting direction accommodates back-boring and reverse-spindle setups
• 0.14-inch minimum bore diameter enables access to very small internal diameters
• 0.25-inch maximum bore depth suits shallow precision bores
• Bright finish coating resists built-up edge and simplifies chip evacuation observation
• Compact 2-inch overall length reduces overhang and improves rigidity

Compatibility

Designed as an OEM-style replacement or direct-use boring bar for CNC lathes and manual turning centers accepting a 3/16-inch round shank tool holder.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Secure the shank fully in the tool holder to the manufacturer-recommended clamping depth to minimize deflection during cut. Confirm spindle direction matches the left-hand cutting geometry before engaging the workpiece. Inspect the cutting edge for chips or wear before each setup, as carbide micro-grade tooling is brittle and sensitive to interrupted cuts or improper clamping.