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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(30000 available )

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100 Ratings
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Reviews
  • Larry

    > 3 day

    Worked perfectly on my Deutz F3L912. Left excellent pattern. Absolutely no surprises. Engine runs clean, smooth, like new.

  • Paul H. Shimek

    Greater than one week

    I appreciate Amazon providing this tool. Not easy to find and a must have for engine rebuilding.

  • kim DiDonato-Murrell

    > 3 day

    I used this to Bust the glaze on a 68mm bore, in a cast steel barrel of a motorcycle engine. It worked really well - 10 - 30 SAE Oil, 1,500 RPM for a few minutes, left a very smooth set of honing lines. BUT 1: you have to REALLY take time getting th e abrasive out of the barrel after the hone. and 2) I think you may need to run the devices for longer than I did, as the scoring marks were still evident after running in the Bke.

  • Thomas Hughes

    04-06-2025

    ....looks great, arrived fast!

  • SECRET SHOPPER

    > 3 day

    Worked Great !

  • Jack

    > 3 day

    Smooth

  • Gonzalez, A

    > 3 day

    Pricey

  • Hoosyabigdog

    > 3 day

    Item is as it was described and we are extremely pleased with this purchase. Thanks again.

  • Chris

    > 3 day

    This honing brush is easy to use, is high quality and worked just as described. You do need to ensure you move at a quick and consistent pace to get a good cross hatch. I recommend this tool for anyone looking to refresh and engine.

  • jeff beary

    > 3 day

    Bought this to rehone the 3.8 Buick cylinders after trying to use them old stone three arm hone devices. I have no idea why I ever thought that contraption would ever work. This thing is a beast. Takes seconds to use properly and I didnt have second thoughts about putting the crank back in and hooking up the Pistons. If you ever plan during your mid-life crisis that you must rebuild an engine, save yourself some time and get this and the next grit under and use these to perfectly hone your sbc or whatever man.

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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