Brush Research Mfg. BC55M18 Flexible Cylinder Hone 180 Grit

Product Description

The BRUSH RESEARCH MFG. BC55M18 is a flexible cylinder hone designed for precision surface finishing inside small-diameter bores. Built with silicon carbide abrasive at 180 grit (extra fine grade), it removes minor burrs, improves surface finish, and restores bore geometry without aggressive material removal. The abrasive length is 1.5 inches, the overall length is 8 inches, and the shank diameter is 0.083 inches. It fits bores up to 0.217 inches in diameter and runs at a maximum of 1,200 RPM. Machinists, toolmakers, and maintenance technicians use this tool with a standard drill or drill press for controlled cylinder finishing work.

This hone is suited for small-bore applications in mild steel, stainless steel, and cast iron components. Typical use cases include deburring hydraulic valve bodies, cleaning up small cylinder bores, and surface conditioning precision-fit parts in manufacturing or repair environments. The flexible ball-style abrasive construction allows the hone to self-center in the bore and conform to slight irregularities, making it practical for both production and bench-level repair work.

Key Features

• Silicon carbide abrasive rated at 180 grit for extra fine surface finishing
• Maximum bore diameter of 0.217 inches suits small-diameter precision bores
• 1.5-inch abrasive length provides consistent contact through short bores
• 8-inch overall length accommodates standard drill chuck setups
• Rated to 1,200 RPM for use with variable-speed drills or drill presses
• Compatible with mild steel, stainless steel, and cast iron workpieces

Compatibility

Designed for use on mild steel, stainless steel, and cast iron bores with a maximum bore diameter of 0.217 inches. Suitable for small-bore finishing applications in machining, maintenance, and repair operations.

Installation Notes

Chuck the 0.083-inch shank securely in a variable-speed drill or drill press before use. Do not exceed 1,200 RPM during operation. Apply a light honing oil or appropriate cutting fluid to the bore to extend abrasive life and improve surface finish quality. Always wear appropriate eye protection and secure the workpiece before starting the tool.