Accupro ACC-BB2901250G Boring Bar 0.29in Min Bore Rh Carbide

Product Description

The ACCUPRO ACC-BB2901250G is a solid carbide boring bar designed for precision internal boring operations on CNC lathes and manual turning centers. Built from micrograin solid carbide with a titanium nitride (TiN) coating, this bar delivers consistent dimensional accuracy at the small bore diameters that high-speed steel or brazed tooling often struggle to hold. The right-hand cutting configuration suits standard spindle setups, and the 5/16-inch shank diameter fits compact tool holders without modification. Machinists, toolroom operators, and CNC turning technicians are the primary installers of this tooling.

This boring bar is suited for small-bore internal turning work in job shops, production machining cells, and toolroom environments. The 0.29-inch minimum bore diameter makes it appropriate for tight-bore applications in steel, aluminum, cast iron, and similar machinable materials. The 2.5-inch overall length and 1.25-inch maximum bore depth fit typical short-reach tooling applications where rigidity is a priority. No specific machine model compatibility is stated by the manufacturer for this part.

Key Features

• Micrograin solid carbide construction for improved wear resistance and edge stability in small-bore applications
• TiN finish coating reduces friction and extends cutting edge life
• Right-hand cutting direction compatible with standard CNC and manual lathe setups
• 0.29-inch minimum bore diameter supports tight-tolerance internal turning
• 1.25-inch maximum bore depth with 5/16-inch shank for compact, rigid tool holder engagement
• 2.5-inch overall length balances reach and deflection control

Compatibility

Designed as an OEM-style solid carbide boring bar for use in standard tool holders accepting a 5/16-inch round shank, suitable for CNC and manual turning applications requiring a right-hand internal boring tool.

Installation Notes

Installation is performed by a qualified machinist or CNC toolroom technician. Ensure the machine spindle is fully stopped and the machine is in a safe state before changing or seating tooling. Secure the shank in a compatible boring bar holder to the holder manufacturer's clamping specification; do not overtighten set screws against the TiN-coated shank surface without appropriate shim protection. Verify tool overhang and runout with a dial indicator before taking the first cut.