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Industrial & Scientific > Abrasive & Finishing Products > Finishing Products > Laps & Hones > Flex Hones > B002XUL1F8
  1. Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/4
    Image(s) provided for illustrative purposes and may differ from the actual product
  2. Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive, 3-1/4" (83 mm) Diameter, 240 Grit Size

    Delivery: 10-20 Working Days
    Customer Ratings (147 reviews)
    Price R945.00


This item may be available in a different size, colour, scent, version or platform. Click below to be directed to product options:

Product Description

  • Flexible abrasive cylinder hone for surface finishing and cross hole deburring
  • Self-centering, self-aligning, self-compensating for wear
  • Use by hand or in CNC equipment
  • Order by actual bore size, tool produced oversized
  • Sizes from 4mm to 36 inches
Additional Information

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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Flex-Hone Tool
Brush Research Mfg.
Brush Research Mfg.
Brush Research Mfg.
Brush Research Mfg.
Most Helpful Customer Reviews

Used to scruff up some crosshatch patterns on my R75/5 rebuild. Used a simple power drill and WD40 as a lubricant.

Bike runs great and new rings have seated in well. No smoke or oil consumption.
Excellent product. Brush hones are a very good thing to have around and BRM makes about the best ones. The price on amazon is inline with just about everywhere else so can't complain there. I used this particular hone on a standard bore small block ford engine block to hone the cylinders before I installed the pistons and rings. The 180 grit has worked great for me with standard Iron piston rings. If you're using moly rings or something else, refer to the manufacturers recommendation when choosing grit size. I also like the brush hones because you can purchase one for less than a machine shop will charge you to hone your cylinders, and you can usually do more than one block with one. The last BRM hone I had did 5 small blocks and still has some life in it. Take that for what you will. Very good product at a very good price. Definitely recommend for your rebuild or re-ring project!
These guys make the best hones I have used over 30 years. If you use this hone correctly you can bore a cylinder out 10,000ths top to bottom evenly for 10 over pistons and rings. I do this in a variable speed drill but it can be done in a drill press too. You must check all points in the cylinder often, cleaning as you go. Use a coarse hone to get most of it then change to a hone grit specified by your piston and ring manufacturers. Clean the cylinder and oil it testing with the piston for clearance. Use your micrometer til you reach spec so you don't get your piston stuck in the cylinder. Don't Rush!! Watch a cylinder honing machine on you-tube to understand the motion you must use to keep the honing even. Always use a quality honing oil.
Please Note

The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.

Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!

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Please also ensure that you are ordering the correct item for your particular application as returns to the USA are costly. Product reviews are also provided for most of our items, which can give you a good idea for possible things to look out for and the quality of the item. By clicking Add to Cart, you are confirming that the item is correct and you accept the conditions listed here.