Brush Research Mfg. BC12M320AO Flexible Cylinder Hone 320 Grit

Product Description

The BRUSH RESEARCH MFG. BC12M320AO is a flexible cylinder hone designed for deburring, surface finishing, and bore conditioning in small-diameter cylinders. It uses aluminum oxide abrasive at 320 grit for fine material removal on softer metals including aluminum, brass, and bronze. The hone measures 8 inches overall length with a 2.5-inch abrasive length and a shank diameter of 0.168 inches, making it compatible with standard drill chucks and rotary tools. Machinists, engine rebuilders, and maintenance technicians use this tool to restore bore geometry and surface finish without aggressive stock removal.

This hone is suited for small-bore applications in engine rebuilding, hydraulic cylinder service, and precision machining shops. The 12mm maximum bore diameter makes it appropriate for small engine cylinders, pneumatic components, and hydraulic actuator bores. It is rated to a maximum of 1200 RPM and is intended for use in aluminum, brass, and bronze workpieces where controlled, fine finishing is required. A single unit is the standard package quantity.

Key Features

• 320 grit aluminum oxide abrasive for fine surface finishing and deburring
• 12mm maximum bore diameter suits small cylinders and hydraulic components
• 2.5-inch abrasive length provides consistent contact across the bore surface
• 8-inch overall length allows reach into deeper bores with standard tooling
• 0.168-inch shank diameter fits standard drill chucks and rotary tool collets
• Maximum 1200 RPM operating speed for controlled, repeatable finishes

Compatibility

Designed for use on aluminum, brass, bronze, and other softer metal bores up to 12mm in diameter. Suitable for use with standard handheld drills and rotary tools capable of variable-speed operation.

Installation Notes

Installation is performed by machinists or maintenance technicians using a variable-speed drill or rotary tool. Secure the 0.168-inch shank firmly in the drill chuck before operation and confirm the tool does not exceed 1200 RPM. Apply a suitable honing oil or cutting fluid to the bore surface to extend abrasive life and improve finish quality. Inspect the abrasive balls for wear or damage before each use and replace the hone if stones show uneven wear.