Accupro B3202000R Corner Radius Boring Bar Solid Carbide

Product Description

The ACCUPRO B3202000R is a corner radius boring bar machined from submicron solid carbide for internal boring operations requiring tight tolerances and a controlled corner radius. With a minimum bore diameter of 0.32 inches and a maximum bore depth of 2 inches, this bar handles small-bore finish work in precision machining environments. The right-hand cutting direction and bright finish coating suit standard CNC lathe and boring mill setups. A 3/8-inch shank diameter and 4-inch overall length (OAL) make it compatible with common tooling blocks and quick-change holders. The corner radius range of 0.0050 to 0.0080 inches allows machinists to produce controlled blends at bore transitions without secondary operations.

This boring bar is suited for job shops, production machining cells, and tool rooms where small-diameter internal turning is routine. Typical applications include finishing bores in steel, stainless, cast iron, and non-ferrous workpieces where a defined corner radius is required at the bore floor or shoulder. It is installed and operated by machinists and CNC programmers working to close dimensional tolerances in component manufacturing.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in small-bore applications
• Corner radius range of 0.0050 to 0.0080 inches for controlled shoulder and floor blends
• Right-hand cutting direction for standard lathe and boring mill orientation
• Bright finish coating - no additional coating buildup that could affect shank or bore fit
• 3/8-inch shank diameter fits common boring bar holders and quick-change tooling systems
• 4-inch OAL with 2-inch maximum bore depth supports adequate reach without sacrificing rigidity

Compatibility

Designed for use in boring bar holders and tooling blocks accepting a 3/8-inch round shank, common on CNC lathes, turning centers, and manual boring mills configured for small-bore internal turning.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before seating or removing the boring bar from its holder. Ensure the shank is clean and the holder set screws are torqued per the holder manufacturer's specification before running. Verify runout at the cutting tip after installation to confirm proper seating before committing to a finishing pass.