Brush Research Mfg. BC18M12 Flexible Cylinder Hone

Product Description

The BRUSH RESEARCH MFG. BC18M12 is a flexible cylinder hone designed for bore finishing and surface preparation in metalworking and maintenance applications. Built with silicon carbide abrasive at 120 grit, it delivers a fine cut suitable for deburring, sizing, and surface conditioning inside cylinder bores. The tool measures 8 inches in overall length with a 2.5-inch abrasive section and a 0.190-inch shank diameter. It is rated for a maximum spindle speed of 1,000 RPM. Machinists, engine rebuilders, and maintenance technicians install this tool using a standard drill press, hand drill, or lathe to restore bore geometry and improve surface finish.

The BC18M12 is sized for bores up to 0.7090 inches in diameter, making it well suited for small-bore cylinder honing in engine components, hydraulic cylinders, and precision housings. It is compatible with mild steel, stainless steel, and cast iron workpieces. The flexible abrasive construction allows the tool to conform to the bore wall, producing consistent contact and uniform surface finish across the full abrasive length. This tool is appropriate for both production shops and field maintenance environments where bore reconditioning or preparation is required before fitting new components.

Key Features

• Silicon carbide abrasive at 120 grit provides a fine cutting action for bore finishing and light material removal
• Maximum bore diameter of 0.7090 inches suits small-bore cylinders and precision housings
• 2.5-inch abrasive length ensures consistent contact along the bore wall
• 8-inch overall length accommodates deep bore access with standard rotary tooling
• 0.190-inch shank diameter fits common drill chucks and collets
• Rated to 1,000 RPM maximum for controlled, safe operation

Compatibility

Compatible with mild steel, stainless steel, and cast iron workpieces. Designed for small-bore cylinder honing applications where the bore diameter does not exceed 0.7090 inches.

Installation Notes

This tool is installed by machinists and maintenance technicians using a drill press, portable drill, or lathe. Secure the 0.190-inch shank firmly in the chuck before operation and confirm spindle speed does not exceed the 1,000 RPM maximum rating. Apply a suitable cutting fluid or honing oil to the abrasive surface to extend tool life and improve finish quality. Wear appropriate eye protection and secure the workpiece before beginning the honing operation.