Accupro B120800R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B120800R is a corner radius boring bar machined from submicron solid carbide for high-precision internal turning and boring operations. It cuts in a right-hand direction and reaches a minimum bore diameter of 0.12 inches with a maximum bore depth of 0.8 inches. The 3/16-inch shank diameter and 2-inch overall length make it well-suited for small-bore work where rigidity and dimensional accuracy are critical. A bright finish coating is applied to the flute and body. Corner radius range spans 0.005 to 0.008 inches, allowing controlled edge prep on finished bores. This bar is used by machinists and tool-and-die professionals working on CNC lathes and manual turning equipment.

This boring bar is intended for small-diameter internal boring, profiling, and corner radius blending in ferrous and non-ferrous materials. It fits applications where a standard turning insert cannot reach or where a precise corner radius is required at the bottom of a bored feature. Typical use cases include finish boring on CNC turning centers, toolroom lathes, and Swiss-style screw machines. The submicron carbide grade supports longer tool life in hardened or abrasive workpiece materials compared to standard carbide grades.

Key Features

• Submicron solid carbide construction for high wear resistance in demanding materials
• Right-hand cutting direction compatible with standard spindle rotation on most lathes
• Minimum bore diameter of 0.12 inches for tight, small-bore applications
• Corner radius range of 0.005 to 0.008 inches for controlled edge geometry
• Bright finish coating on carbide body
• 3/16-inch shank diameter and 2-inch overall length for compact tooling setups

Compatibility

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

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Secure the shank in a compatible boring bar holder or quick-change toolpost and ensure the bar is clamped to the full recommended engagement depth before cutting. Power down and lock out the spindle before changing or adjusting tooling. Avoid side-loading the bar beyond its rated bore depth, as carbide is brittle and susceptible to chipping under interrupted cuts or excessive overhang.