Standard-Duty Cylinder Hones for Medium Dia. Bores 3-1/4" to 4-5/8" 

GB Series Flex-Hone® Tools

GB Series Flex-Hone® tools are flexible cylinder hones for bores with diameters from 3-1/4" (83mm) to 4-5/8" (118mm). These surface finishing and deburring tools are described as "standard-duty" because they have a shorter abrasive length than GBD Series Flex-Hone® tools, which provide more abrasive per hone and typically last longer.

GB Series Flex-Hone® tools have an overall length of 13-1/2" (342.9mm) and are available for five bore sizes: 3-1/4" (83mm), 3-1/2" (89mm), 3-3/4" (95mm), 4-1/8" (105mm), and 4-5/8" (118mm). To provide a soft cutting action, flexible cylinder hones are supplied and used in an oversized condition. For example, the GB Flex-Hone® for a 3-1/4" bore has a tool diameter that's slightly larger than 3-1/4". 

Like other medium-diameter Flex-Hone® tools, GB cylinder hones are available in seven standard abrasive types, and in grit sizes that range from 20 (coarse) to 800 (fine). As a rule, start with a coarser-grit Flex-Hone® and then use a finer-grit tool. Always use a high-quality lubricant such as Flex-Hone® oil, and lubricate the tool generously.

Automotive applications for GB Series Flex-Hone® tools include deglazing and finishing engine cylinders and cylinder liners. Industrial applications include any cylinder that requires deburring or surface finishing within the appropriate size range. GB Series Flex-Hone® tools are designed for use with most any rotating spindle. Examples include handheld electric drills and CNC machining centers.

Order GB Series Flex-Hone tools on-line, or complete the form on this page to download the BRM Catalog.