Accupro B120250R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B120250R is a corner radius boring bar machined from submicron solid carbide and designed for internal boring operations requiring a controlled corner radius profile. Built for right-hand cutting, it features a minimum bore diameter of 0.12 inches and accepts maximum bore depths of 0.25 inches. The 3/16-inch shank diameter and 2-inch overall length make it suited for small-bore applications where rigidity and dimensional accuracy are essential. The bright finish coating reduces friction and aids chip evacuation. Machinists use this bar in CNC lathes and manual turning centers where tight tolerances on internal corner geometry are required.

This boring bar is used in precision turning applications across production machine shops, tool rooms, and maintenance facilities. It is appropriate for small-diameter internal features in ferrous and non-ferrous workpieces. The corner radius range of 0.005 to 0.008 inches allows finishing of fine internal profiles where sharp corners must be avoided to reduce stress concentration or meet part print requirements. It is typically installed in a standard boring bar holder or a collet-style toolholder sized for a 3/16-inch shank.

Key Features

• Submicron solid carbide construction for high rigidity and wear resistance in small-bore applications
• Right-hand cutting direction for standard turning setups
• Corner radius range of 0.005 to 0.008 inches for controlled internal profile finishing
• Bright finish coating reduces friction and promotes chip clearance
• 3/16-inch shank diameter fits common small-bore toolholders and collet systems
• Compact 2-inch overall length minimizes overhang and vibration

Compatibility

Designed for use in CNC and manual turning centers with toolholders or collet chucks accommodating a 3/16-inch shank boring bar.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and lock out the machine before seating the bar in the toolholder. Ensure the shank is fully clamped and the bar is set on centerline to maintain bore geometry. Avoid excessive overhang beyond the toolholder to reduce chatter and protect the carbide from fracture.