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Brush Research BC7818 FLEX-HONE®, 7/8' (22.2mm) Diameter, 180 Grit, Silicon Carbide, For Mild Steel, Stainless Steel, Cast Iron and Softer Ferrous Materials

Free shipping on orders over $29.99

$19.99

$ 9 .99 $9.99

In Stock

1.:0.157 (4mm)


2.:20 Grit


About this item

  • [QUALITY]-Proudly Made in the USA. Quality and consistency you can count on made from the inventors and makers of the tool.
  • [DESIGN]-The FLEX-HONE is intentionally manufactured oversized. This engineered oversize creates the optimal amount of pressure inside the cylinder wall allowing the tool to be self-centering, self-aligning and self-compensating for wear and easy use.
  • [FINISHING BENEFITS]-Offered in a wide variety of grits to achieve specific finishing tolerances as well as a beautiful crosshatch finish. Ideal for rebuilding hydraulic and pneumatic cylinders, engine and brake cylinders, valve guides, pumps, compressors and more.
  • [CROSSHOLE DEBURRING]-Accomplish finishing and deburring simultaneously in a single setup. Can be used in virtually any rotating spindle from a hand drill, drill press or CNC equipment.
  • [180 GRIT SILICON CARBIDE ABRASIVE]-Excellent on mild steel, stainless steel, cast iron and other softer ferrous materials. Typically achieves a finish of 30 - 40 Microinch (.7 - 1 Micrometer).
  • [WHAT'S INCLUDED]-1 Each of a BC Standard Duty FLEX-HONE: 0.875"(22.2mm) Bore Diameter, 3" Abrasive Part Length, 0.228" Shank Diameter, 8" Overall Length. For Use on Bore Diameters Between 0.788"-0.875". PLEASE NOTE: ORDER BY BORE SIZE.


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.


Josh S
Reviewed in the United States on February 22, 2025
Worked as advertised fixed a backpack blower cylinder that was cooked just put 10w30 on it and read the instructions easy diy fix
Josh S
Reviewed in the United States on February 22, 2025
Worked as advertised fixed a backpack blower cylinder that was cooked just put 10w30 on it and read the instructions easy diy fix
J. Brillinger
Reviewed in the United States on February 15, 2025
I needed to hone two bushings to size fore a sliding fit, worked perfect, good quality and value.
J. Brillinger
Reviewed in the United States on February 15, 2025
I needed to hone two bushings to size fore a sliding fit, worked perfect, good quality and value.
Moe
Reviewed in the United States on June 4, 2024
Works great,next time get a more aggressive grit.. 120Shotgun choke honing..
Moe
Reviewed in the United States on June 4, 2024
Works great,next time get a more aggressive grit.. 120Shotgun choke honing..
Cody
Reviewed in Canada on March 24, 2024
Quick delivery
Cody
Reviewed in Canada on March 24, 2024
Quick delivery
BJ La Trace
Reviewed in Canada on March 13, 2024
As described.
BJ La Trace
Reviewed in Canada on March 13, 2024
As described.
Jerry Sample
Reviewed in the United States on December 19, 2024
Needed to hone the lifter and guide bores on a Lincoln Zephyr V-12 block and they worked great, good quality for my use and the seller got it to me in a good timely manner
Jerry Sample
Reviewed in the United States on December 19, 2024
Needed to hone the lifter and guide bores on a Lincoln Zephyr V-12 block and they worked great, good quality for my use and the seller got it to me in a good timely manner
Andrew
Reviewed in the United States on December 11, 2024
Recommended to me by Tinman's Saws on YouTube, these really do a great job of cleaning up Nikasil plating in 2 cycle engines after clearing off piston transfer with sandpaper. I have brought several BR700 blowers and at least 5 saws back to life this way.
Andrew
Reviewed in the United States on December 11, 2024
Recommended to me by Tinman's Saws on YouTube, these really do a great job of cleaning up Nikasil plating in 2 cycle engines after clearing off piston transfer with sandpaper. I have brought several BR700 blowers and at least 5 saws back to life this way.
John PJ
Reviewed in the United States on November 27, 2024
use for my hobby and was concerned it was not going to do the job. Works great.
John PJ
Reviewed in the United States on November 27, 2024
use for my hobby and was concerned it was not going to do the job. Works great.
Customer
Reviewed in the United States on October 22, 2024
Flex homes are the best I’ve ever used. Last long and are available in any size. Little pricy but worth in it longevity.
Customer
Reviewed in the United States on October 22, 2024
Flex homes are the best I’ve ever used. Last long and are available in any size. Little pricy but worth in it longevity.
James S.
Reviewed in the United States on April 25, 2024
This is a great tool to recondition a cylinder bore. Easy to use, and if you follow the directions you will produce a nice cross hatch pattern necessary when new rings are fitted.
James S.
Reviewed in the United States on April 25, 2024
This is a great tool to recondition a cylinder bore. Easy to use, and if you follow the directions you will produce a nice cross hatch pattern necessary when new rings are fitted.
George
Reviewed in Canada on August 22, 2023
Good as can be expected.
George
Reviewed in Canada on August 22, 2023
Good as can be expected.
Emil magnusson
Reviewed in Sweden on February 20, 2023
Perfekt
Emil magnusson
Reviewed in Sweden on February 20, 2023
Perfekt
Andrew
Reviewed in Canada on September 26, 2022
Fits a 250cc bike cylinder well. Bought for a 67mm kdx250.
Andrew
Reviewed in Canada on September 26, 2022
Fits a 250cc bike cylinder well. Bought for a 67mm kdx250.
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