Industrial GBD60032 Flex Hone Tool

The BRM GBD60032 Flex-Hone is a 6-inch bore flexible cylinder honing tool from Brush Research Manufacturing (BRM), part of the heavy‑duty GBD series designed to finish and deburr internal cylinder surfaces. It uses 320-grit silicon carbide abrasive spheres, with a 6-1/4-inch abrasive length and a 17-1/2-inch overall length, and a 0.42-inch stem diameter for mounting in CNC machines, drill presses, or standard drills. Rated up to 600 RPM, this tool delivers a soft cutting action suitable for cast iron, mild steel, stainless steel, and other softer ferrous materials. The 6-inch bore GBD60032 is manufactured in the USA and is listed for bores from 3" to 8" in BRM's catalog; BRM notes that GBD tools are used in engine-related applications such as cylinders and cylinder liners, as well as industrial applications requiring deburring or surface finishing within the size range. The combination of grit, abrasive material, and length is designed to provide consistent internal finishes when used with appropriate machine spindles and feeds.