Accupro B180750R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B180750R is a corner radius boring bar designed for precision internal turning operations on small-bore workpieces. Machined from submicron solid carbide, this right-hand-cut bar delivers the rigidity and edge retention needed to hold tight tolerances in hardened or abrasive materials. It features a bright finish coating and accepts a 1/4-inch shank for use in compatible boring bar holders. The corner radius range of 0.0050 to 0.0080 inches makes it well suited for applications where a controlled edge break or blend radius is required at the bottom of the bore. Machinists and toolroom operators install this bar in CNC lathes, boring mills, and manual engine lathes for finish and semi-finish internal turning work.

The B180750R is sized for small-bore applications, with a minimum bore diameter of 0.18 inches and a maximum bore depth of 0.75 inches. Its overall length of 2.5 inches suits tooling setups where compact reach is required. The submicron carbide grade provides superior wear resistance compared to standard carbide grades, making it appropriate for high-production runs or when cutting difficult-to-machine alloys, stainless steels, and hardened materials. This bar is a single-unit item typically stocked in toolrooms, maintenance shops, and precision machine shops.

Key Features

• Submicron solid carbide construction for enhanced hardness and edge retention
• Right-hand cutting direction for standard internal boring operations
• Corner radius of 0.0050 to 0.0080 inches for controlled edge blending at bore bottom
• Bright finish coating with no added coating thickness to affect dimensional accuracy
• 1/4-inch shank diameter compatible with standard small-bore toolholders
• Compact 2.5-inch overall length for tight tooling envelopes

Compatibility

Designed as an OEM-style solid carbide boring bar for use in standard 1/4-inch boring bar holders on CNC and manual lathes configured for small internal turning operations.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the machine is locked out before changing or setting tooling. Secure the 1/4-inch shank in a compatible boring bar holder with adequate clamping force per the holder manufacturer's instructions. Do not exceed the maximum bore depth of 0.75 inches, and verify runout after installation before beginning any cutting pass.