Accupro ACC-BB290500G Boring Bar 0.29 in Solid Carbide Tin

Product Description

The ACCUPRO ACC-BB290500G is a right-hand cut boring bar machined from micrograin solid carbide and finished with a TiN coating. It is designed for internal boring operations on CNC lathes, manual lathes, and boring heads where precision and rigidity are critical. The bar handles a minimum bore diameter of 0.29 inches and a maximum bore depth of 0.5 inches. With a 5/16-inch shank diameter and an overall length of 2.5 inches, this compact bar is suited for small-bore applications that demand tight tolerances and clean surface finishes. Machinists and toolroom professionals install this bar in standard boring bar holders as a direct working tool.

This boring bar is well suited for small-diameter internal turning and finishing passes in ferrous and non-ferrous materials. The micrograin carbide substrate supports the rigidity needed for precision boring in tight bores where chatter and deflection must be minimized. Its compact overall length makes it a practical choice for short-reach setups on production lathes and manual toolroom machines. The TiN finish coating adds surface hardness and reduces friction at the cutting edge, supporting longer tool life in general-purpose boring applications.

Key Features

• Minimum bore diameter of 0.29 inches for small-bore internal operations
• Maximum bore depth of 0.5 inches suits shallow-bore and finish-boring work
• Micrograin solid carbide construction for rigidity and wear resistance
• TiN finish coating increases edge hardness and reduces friction
• Right-hand cutting direction for standard lathe setup
• 5/16-inch shank diameter fits common boring bar holders

Compatibility

Designed as an OEM-style replacement or direct toolroom selection for standard 5/16-inch boring bar holders used in small-bore internal turning applications on CNC and manual lathes.

Installation Notes

This boring bar is installed and set up by machinists familiar with lathe tooling and boring bar holders. Always power down and lock out the machine before mounting or removing tooling. Secure the shank fully within the holder to the minimum recommended engagement length to reduce overhang and the risk of deflection or chatter. Confirm cutting direction and tool height before initiating a cut.