Brush Research GBD40024 FLEX-HONE, 4 (101mm) Diameter, 240 Grit, Silicon Carbide Abrasive (Pack of 1)

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$49.37

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100 Ratings
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Reviews
  • Michael Patrick

    07-06-2025

    Great part when doing cylinders on refresh build. Thanks

  • mbc

    Greater than one week

    what a product, real good finishing hone.

  • Michael H.

    > 3 day

    Works great, just remember to use oil or it gets aggressive.

  • Tom C

    > 3 day

    USED THIS FOR AN LS2 AND AN LS3. WORKED GREAT FOR BOTH. Some learning curve, but definitely adjust the crank as you go or you could slightly scuff it like I did. Not enough to cause a major issue, but did need to use 2000 grit sandpaper and wd40 to wet sand. thats user error. not the product.

  • Raheen T Frasier

    > 3 day

    Awesomeness

  • Lydia Bauch

    > 3 day

    Worked as expected

  • Miss Beatrice Stanton III

    > 3 day

    I still use this to restore my Onan p218 and p220 engines.

  • John Hughes

    > 3 day

    It works perfectly

  • Nick Kay

    > 3 day

    Yes

  • douglas duren

    > 3 day

    This is the only way to go. Just get the right size for your cylinder

The Flex-Hone® tool was originally created by Brush Research Manufacturing to deglaze cylinder walls in automotive applications. Brush Research embraced the benefits of a plateau finish and pioneered the concept of plateau honing culminating in the introduction of the Flex-Hone tool in 1972. The Flex-Hone has gained many nicknames over the years and including ball hone, ball style hone, flexihone, dingleberry hone, bead brush, glaze breaker and glaze buster. Flexible honing with the Flex-Hone tool produces an oil holding cross hatch pattern and a true plateau finish free of cut, torn and folded metal. Any type or size of cylinder can benefit from the Flex-Hone®. These abrasive bead style brushes are produced in standard diameters from 4mm to 36 inches. Nine abrasive types are offered including silicon carbide, aluminum oxide, boron carbide and diamond allowing the tool to be tailored to finish any base material. A choice of 11 different grit selections are available for precise control of finish parameters. The elimination of peaks results in rapid ring seating, better oil control, reduced seepage in hydraulic and pneumatic applications and provides better seal performance and longer seal life. Successful applications include firearm chambers, shotgun barrels, musical instruments, combustion chambers, air compressors, pumps, valve bodies, valve guides, brake cylinders, wheel cylinders and the list goes on and on. Flex-Hone® tools are also very effective for deburring cross drilled holes, port radiusing and edge blending. Because of its unique construction, the Flex-Hone is self-centering, self-aligning, and self-compensating for wear so it does not require an elaborate set-up or special training. Deburring can be effectively automated and combined in the machining process to allow a complete cylinder finish in one operation or it can be employed as a secondary operation with equal results.

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