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Brush Research FLEX-HONE Cylinder Hone, BC Series, Silicon Carbide Abrasive, 3 (76 mm) Diameter, 240 Grit Size

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$6.78
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Reviews

  • Jules Okuneva

    > 3 day

    Honed a Golfcart cylinder in no time, removed fine scratches and ridge at top of cylinder in under 5 minutes. Pricey but cheaper than a machine shop and frankly equal results for all I needed.

  • MD

    > 3 day

    Used this for my Predator 212cc go kart build, where I was swapping to a flat top piston for additional compression. While the cylinder didn’t look bad to begin with, this hone made it look great. I coated the hone in oil and utilized it for around 30 seconds per the instructions. Can’t wait to use its again on the next build!

  • Joe A.

    Greater than one week

    I used this on my 2004 Tacoma when putting in new leaf springs. I needed to clean and grind down a lot of rust on the inside of the shackle that the leaf spring bolt attaches to. This fit, and worked, perfectly! I went a few sizes up on the diameter of the hone versus the hole to be honed so there would be some additional friction and I could get it as smooth as possible. Attached it to my handle held drill and went to town. Would definitely order it again if I needed it!

  • Parke R Brown

    07-06-2025

    Got it fast and item as described. Love it.

  • Joe A.

    > 3 day

    I used this on my 2004 Tacoma when putting in new leaf springs. I needed to clean and grind down a lot of rust on the inside of the shackle that the leaf spring bolt attaches to. This fit, and worked, perfectly! I went a few sizes up on the diameter of the hone versus the hole to be honed so there would be some additional friction and I could get it as smooth as possible. Attached it to my handle held drill and went to town. Would definitely order it again if I needed it!

  • Jose Velez

    > 3 day

    Did 2 passes with the 240grit on a RM250 cylinder and it came out beautiful , real smooth

  • Mike

    > 3 day

    Purchased 76mm for honing an old ATV cylinder. Some WD40 and several passes later the bore is cleaned up and has a nice surface for the new piston rings to seal in. Cleanup is easy with carb or brake cleaner. Make sure to get the right size hone for your bore!

  • Hollywood

    07-06-2025

    Exactly what you need to prep a new Nikasil cylinder for new rings. This will remove material quickly, which is what you need to set in a nice hash pattern in Nikasil. However, you only need a slow speed (low gear on most drills) and only 3 or 4 oscillating strokes. Good luck.

  • Muscle Car Builder

    > 3 day

    Great

  • Muscle Car Builder

    > 3 day

    Great

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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