Accupro B200900R Corner Radius Boring Bar Submicron Carbide

Product Description

The ACCUPRO B200900R is a solid carbide corner radius boring bar designed for precision internal turning and boring operations on CNC lathes and manual boring setups. Built from submicron-grade carbide, this bar delivers consistent edge integrity and wear resistance in tight-tolerance applications. It features a 0.25 inch shank diameter, an overall length of 2.5 inches, and a corner radius range of 0.0050 to 0.008 inches. The bright uncoated finish suits applications where coating interaction with the workpiece material is a concern. Right-hand cut geometry makes this bar compatible with standard spindle configurations.

This boring bar is suited for small-diameter internal finishing work requiring precise corner radius control. With a minimum bore diameter of 0.2 inches and a maximum bore depth of 0.9 inches, it fits production and toolroom environments where small-bore accuracy is critical. Machinists and tool-and-die professionals use bars in this class for finishing passes on ferrous and non-ferrous materials where surface finish and dimensional control are the primary objectives.

Key Features

• Submicron carbide grade provides high hardness and edge retention in demanding cuts
• Corner radius range of 0.0050 to 0.008 inches for controlled surface blending at bore shoulders
• Minimum bore diameter of 0.2 inches suits small-bore internal operations
• Maximum bore depth of 0.9 inches covers most small-part boring requirements
• Bright uncoated finish maintains dimensional accuracy of the cutting edge geometry
• Right-hand cut for use with standard lathe and boring mill spindle rotation

Compatibility

Designed as a direct-fit boring bar for tool holders and boring bar sleeves accepting a 0.25 inch round shank. Typical fitment in CNC turning centers, manual lathes, and jig borers configured for right-hand internal turning tooling.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for boring bar setup and overhang limits. Power down and lockout the spindle before seating or removing the bar from the holder. Minimize shank overhang beyond the holder to reduce chatter and deflection. Confirm tool-holder set-screw torque and runout with a dial indicator before commencing cuts.