Accupro ACC-BBL050400 Boring Bar Left Hand Solid Carbide

Product Description

The ACCUPRO ACC-BBL050400 is a solid carbide boring bar designed for precision internal boring operations on small-diameter holes. Built from submicron-grade carbide with a bright finish coating, it delivers consistent cutting performance in tight bores. The left-hand cutting direction suits specific machine setups where conventional right-hand tooling cannot be used. With a minimum bore diameter of 0.05 inches and a maximum bore depth of 0.4 inches, this bar targets fine, shallow bores where rigidity and dimensional accuracy are critical. Machinists and tool-and-die professionals working on CNC lathes and boring mills are the primary users of this style of tooling.

This boring bar is suited for small-bore finishing and semi-finishing passes in ferrous and non-ferrous materials on CNC or manual lathes. The 1/8-inch shank diameter fits standard small-bore tool holders and quick-change systems commonly found in precision machining environments. It is appropriate for shops producing medical components, instrument parts, watch components, or other fine-tolerance work requiring controlled bore geometry at diameters starting at 0.05 inches.

Key Features

• Submicron solid carbide construction for rigidity and wear resistance in small-bore applications
• Left-hand cutting direction for reverse-spindle or back-boring setups
• Minimum bore diameter of 0.05 inches suits very fine internal features
• Maximum bore depth of 0.4 inches for shallow through and blind bore work
• Bright finish coating reduces built-up edge in non-ferrous materials
• 1/8-inch shank diameter fits standard small-bore tool holders

Compatibility

Designed as an OEM-style replacement or direct addition for small-bore internal turning setups using 1/8-inch shank tool holders on CNC or manual lathes requiring left-hand cut boring bars.

Installation Notes

Installation of boring bars should be performed by a qualified machinist following the machine tool manufacturer guidelines. Power down and lock out the spindle before inserting or removing the tool from the holder. Ensure the shank is fully seated and clamped securely in the tool holder to minimize runout and chatter. Do not exceed the recommended overhang for the shank diameter, as excessive overhang increases deflection and reduces bore accuracy.