Accupro ACC-BB200400 Boring Bar Submicron Solid Carbide

Product Description

The ACCUPRO ACC-BB200400 is a solid carbide boring bar designed for precision internal boring operations on lathes and boring machines. Built from submicron-grade carbide with a bright finish coating, it delivers consistent performance in tight-tolerance bore applications. The bar features a right-hand cutting direction, a minimum bore diameter of 0.2 inches, and a maximum bore depth of 0.4 inches. With a 0.25-inch shank diameter and an overall length of 2.5 inches, it fits standard toolholders used in small-bore finish work. Machinists and tool-and-die professionals install this bar when chatter control and dimensional accuracy are critical.

This boring bar is suited for small-diameter internal boring in ferrous and non-ferrous materials across production and job-shop environments. Its compact geometry makes it appropriate for CNC lathes, manual engine lathes, and mill-turn centers where bore diameters in the 0.2-inch range are required. The submicron carbide grade supports higher surface speeds and extended tool life compared to standard carbide grades, making it a practical choice for finish boring passes on precision components.

Key Features

• Submicron solid carbide construction for improved wear resistance and edge retention
• Right-hand cutting direction for standard lathe and boring machine setups
• Minimum bore diameter of 0.2 inches enables work in very small internal diameters
• Maximum bore depth of 0.4 inches suits shallow through-bore and blind-bore applications
• Bright finish coating reduces friction and aids chip evacuation
• 0.25-inch shank diameter fits common small-bore toolholders and collet-style holders

Compatibility

Designed as an OEM-style replacement and standard fit for toolholders accepting a 0.25-inch round shank boring bar in lathe, mill-turn, and boring machine applications.

Installation Notes

Installation is performed by qualified machinists familiar with toolholder setup and cutting parameter selection. Ensure the machine spindle is fully stopped and locked out before seating or removing the boring bar from the holder. Confirm shank clamp torque matches the toolholder manufacturer specification and that the bar overhang does not exceed recommended depth-to-diameter ratios to prevent chatter. Inspect the cutting edge under magnification before use to confirm no edge chipping is present.