Accupro B4902000R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B4902000R is a corner radius boring bar engineered for precision internal turning and boring operations on CNC and manual lathes. Constructed from submicron-grade solid carbide, it delivers superior hardness and wear resistance compared to standard carbide grades. The bright finish coating reduces built-up edge and aids chip evacuation. With a minimum bore diameter of 0.49 inches, a maximum bore depth of 2 inches, and a 1/2-inch shank diameter, this bar suits close-tolerance finishing passes on small-to-medium bore diameters. Machinists and toolroom professionals use it where consistent corner geometry and surface finish are required in production or prototype environments.

This boring bar is suited for ferrous and non-ferrous materials where a controlled corner radius is required at the base of a bored feature. The right-hand cutting direction makes it compatible with standard spindle rotation on conventional turning centers. The corner radius range of 0.005 to 0.008 inches allows a small but defined radius at the bore corner, reducing stress concentrations in finished parts. It is appropriate for aerospace, automotive, and general precision machining shops that require repeatable bore geometry in tight-tolerance applications.

Key Features

• Submicron solid carbide construction for high hardness and extended tool life
• Corner radius range of 0.005 to 0.008 inches for controlled bore corner geometry
• Minimum bore diameter of 0.49 inches suits small-bore precision work
• Maximum bore depth of 2 inches on a 4-inch overall length bar
• 1/2-inch shank diameter for standard toolholder compatibility
• Bright finish coating minimizes built-up edge and aids chip flow
• Right-hand cutting direction for standard spindle rotation setups

Compatibility

Designed for use in standard 1/2-inch boring bar toolholders on CNC turning centers and manual lathes requiring right-hand internal boring operations.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines. Ensure the machine spindle is fully stopped and locked out before mounting or adjusting the boring bar. The bar should be clamped securely in a properly sized toolholder with minimum overhang to reduce vibration and deflection. Confirm shank clamp torque to toolholder specifications before initiating a cut.