Brush Research Mfg. BC64M32 Flexible Cylinder Hone 320 Grit

Product Description

The BRUSH RESEARCH MFG. BC64M32 is a flexible cylinder hone designed for fine surface finishing and deburring of small-diameter bores. It uses 320-grit silicon carbide abrasive, classified as extra fine grade, to produce a controlled finish on the interior walls of cylinders and bores up to 0.25 inches in diameter. The overall length is 8 inches with an abrasive contact length of 1.5 inches and a shank diameter of 0.112 inches. Rated to a maximum of 1,200 RPM, this hone is suited for use in drill presses, lathes, or portable power tools. Machinists, tool-and-die workers, and maintenance technicians typically install and use this tool in precision finishing applications.

The BC64M32 is intended for use on mild steel, stainless steel, and cast iron workpieces. Its small maximum bore diameter of 0.25 inches makes it appropriate for fine-tolerance bores such as hydraulic valve bodies, injector bores, small pneumatic cylinders, and precision mechanical components where surface finish quality and bore geometry matter. The flexible abrasive construction allows the hone to self-center within the bore and conform to slight irregularities without removing excessive material.

Key Features

• 320-grit silicon carbide abrasive provides an extra fine finish suitable for final-stage honing
• Flexible ball-style construction self-centers in the bore for consistent contact
• Maximum bore diameter of 0.25 inches targets small-diameter precision bores
• 1.5-inch abrasive length delivers adequate surface contact in short bores
• 0.112-inch shank diameter fits standard drill chucks and collets
• Rated to 1,200 RPM for use with common rotary tools and drill presses

Compatibility

Designed for use on mild steel, stainless steel, and cast iron bore surfaces with a maximum bore diameter of 0.25 inches. Compatible with standard rotary tools, drill presses, and lathes capable of accepting a 0.112-inch shank.

Installation Notes

Secure the 0.112-inch shank firmly in the tool chuck before operation. Do not exceed the rated maximum speed of 1,200 RPM, as overdriving abrasive hones can cause premature wear or unsafe tool deflection. Apply a light honing oil or cutting fluid appropriate for the workpiece material to extend abrasive life and improve surface finish. Wear appropriate eye protection and secure the workpiece before engaging the tool.