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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

  • Bradley Dockery

    > 3 day

    Awesome bead hone

  • Michael Beach

    > 3 day

    Does a beautiful job as advertised. No complaints on performance or price.

  • Chris S

    09-06-2025

    Used this hone on my 4.030” 351W and am very pleased with the results. About 30 seconds in each cylinder with a little motor oil Is all I needed. Worked great.

  • Duane Wisozk

    > 3 day

    Worked great!

  • JimmyM

    > 3 day

    These ball hones are just right for a quick pass or two without removing too much material. Take care using them and it will last longer. Dont run them past the bottom of the bore or allow them to pop out the top during use. Check your speed and a nice cross hatch pattern is easy to achieve. I used the companion honing oil, pricey but easy clean up make it worth the money.

  • ronald wacks

    > 3 day

    Expensive, but did a professional job honing my jeep cylinders.

  • bud

    > 3 day

    liked the hone, but yikes!, the price!

  • O&R Precision Grinding, INC

    08-06-2025

    Worked as advertised and shipped quickly

  • Jake Zeller

    > 3 day

    Used it on my 4.9 ford engine. It did a fantastic job.

  • Marty

    > 3 day

    Works like a dream!

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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