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Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive

Available in multiple versions

4.8 out of 5 stars 131 customer reviews

Price: $27.09 - $106.40
Product Specifications
Brand Name Brush Research
Grit Material Type silicon_carbide
Manufacturer Grade Standard Duty
Manufacturer Series Number GB
Shank Type Round
UNSPSC Code 31191500

Currently showing 1-15 of 15
ASIN
The Amazon Standard Item Number (ASIN) uniquely identifies the item in the Amazon catalog.
Fits Hole Size Size Grit Type Overall Length Shank Diameter Max Rotational Speed Part Number Price Quantity
   
B002XUL1EO 3.25 inches 3-1/4" 120 13.5 inches 0.310 inches 700 rpm GB31412
$32.27
B002XUL1EY 3.25 inches 3-1/4" 180 13.5 inches 0.310 inches 700 rpm GB31418
$31.16
B002XUL1F8 3.25 inches 3-1/4" 240 13.5 inches 0.310 inches 700 rpm GB31424
$40.77
B002XUL1DK 3.5 inches 3-1/2" 120 13.5 inches 0.310 inches 700 rpm GB31212
$35.56
B002XUL1E4 3.5 inches 3-1/2" 180 13.5 inches 0.310 inches 700 rpm GB31218
$32.41
B002XUL1EE 3.5 inches 3-1/2" 240 13.5 inches 0.310 inches 700 rpm GB31224
$32.65
B002XUL1FI 3.75 inches 3-3/4" 120 13.5 inches 0.310 inches 700 rpm GB33412
$33.34
B002XUL1FS 3.75 inches 3-3/4" 180 13.5 inches 0.310 inches 700 rpm GB33418
$33.34
B002XUL1G2 3.75 inches 3-3/4" 240 13.5 inches 0.310 inches 700 rpm GB33424
$36.20
B002XUL1GC 4.125 inches 4-1/8" 120 13.5 inches 0.310 inches 600 rpm GB41812
$37.76
B002XUL1GM 4.125 inches 4-1/8" 180 13.5 inches 0.310 inches 600 rpm GB41818
$35.46
B002XUL1GW 4.125 inches 4-1/8" 240 13.5 inches 0.310 inches 600 rpm GB41824
$41.74
B002XUL1H6 4.625 inches 4-5/8" 120 13.5 inches 0.310 inches 600 rpm GB45812
$43.25
B002XUL1HG 4.625 inches 4-5/8" 180 13.5 inches 0.310 inches 600 rpm GB45818
$51.90
B002XUL1HQ 4.625 inches 4-5/8" 240 13.5 inches 0.310 inches 600 rpm GB45824
$41.88
Currently showing 1-15 of 15
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Product Features

  • Self-centering, self-aligning, and self-compensating for tool wear, to reduce set-up time and costs and the need for special operator training
  • A soft cutting action to create a plateau finish through a low-temperature abrading process that exposes undisturbed base metal, to help produce a long-wearing surface
  • Grit size ranges from 120 to 320; higher grit numbers are finer, to help create a smooth surface finish
  • Order by actual bore size as the tool is produced oversized
  • Silicon carbide is more aggressive and cuts faster than aluminum oxide

Product Description

Flex-Hone GB-series abrasive bead style brushes for block cylinders have globe-shaped abrasive points on an independent suspension for self-centering, self-aligning to the bore, and self-compensating for wear. This reduces set-up time and costs and the need for special operator training, as well as ensuring precise control of finish parameters. The resilient, flexible honing tool has a soft cutting action to create a plateau finish, where surface irregularities are reduced, while retaining a cross-hatch suitable for oil retention; the plateau finish increases the bearing area of the surface. Order by actual bore size as the tool is produced oversized.

Using the Flex-Hone low-temperature abrading process exposes undisturbed base metal, to help produce a long-wearing surface by removing cut, torn, and folded metal. The final surface of the metal part is optically smooth and has significantly reduced fragmented, amorphous, or smeared metal from previous operations. Cylinder hones are suitable for use deglazing, surface finishing, and deburring on cylinders, as well as cross hole deburring, port radiusing, and edge blending on items such as firearm chambers, musical instruments, combustion chambers, air compressors, pumps, valve bodies, valve guides, and brake cylinders. Use by hand or in NC/CNC equipment. NC-style tools can be used on both the older Numerical Control (NC) machines, which are programmed using physical media such as magnetic tape, and the newer CNC (Computer Numerical Control) machines, which are programmed using computers.

Abrasives are used for a variety of applications from shaping a part to fine finishing, depending on the grit size. Low grit numbers like 40 are coarse and are used for removing excess material and shaping a part. High grit numbers like 400 are fine and help to create a smooth surface finish. Silicon carbide is a sharp, aggressive grain that offers high penetration, fast cutting, and high material removal even under light pressure. It is commonly used with softer materials like brass, plastics, and rubber, and abrasive materials like glass and enamel, but can wear out faster than aluminum oxide when used on wood.

Brush Research Manufacturing Co., headquartered in Los Angeles, manufactures tools in the United States, and has been in operation since 1958. The company specializes in ball hone abrasives and industrial brushes for honing, a type of precision surface finishing. Brush Research meets ISO 9000 certification for quality.


Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B005ANHYF6
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (131 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Shank Diameter: 0.310Part Number: GB31424Max Rotational Speed: 700Size: 3-1/4"Fits Hole Size: 3.25Grit Type: 240Overall Length: 13.5 Verified Purchase
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.
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Shank Diameter: 0.310Part Number: GB31218Max Rotational Speed: 700Size: 3-1/2"Fits Hole Size: 3.5Grit Type: 180Overall Length: 13.5 Verified Purchase
don't have a lot of experience with honing, so nothing really to compare it to. there is a technique to get the right cross hatch pattern. just used it to clean up the cylinder wall when installing new rings. have to move it quickly depending on the drill speed, but it left a really nice pattern and cleaned it up really nice. its quite aggresive so it only takes a few seconds. be careful
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Shank Diameter: 0.310Part Number: GB31224Max Rotational Speed: 700Size: 3-1/2"Fits Hole Size: 3.5Grit Type: 240Overall Length: 13.5 Verified Purchase
I was in a hurry to rebuild my Honda K24 bottom end so i ordered the Flex-Hone to get the cylinder bores ready. It arrived extremely fast and the end product looked better than what i have received from most machine shops. It's also a lot easier to use than the 3 stone honing tools and delivers a better finish on the bore.
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Shank Diameter: 0.310Part Number: GB33424Max Rotational Speed: 700Size: 3-3/4"Fits Hole Size: 3.75Grit Type: 240Overall Length: 13.5 Verified Purchase
I've been using flex-hones on my engine builds for several decades and they always give me the finish I want. They are inexpensive so it's not a big deal that I need 4-5 to ocver all the different sizes I need. A great product!
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Shank Diameter: 0.310Part Number: GB31224Max Rotational Speed: 700Size: 3-1/2"Fits Hole Size: 3.5Grit Type: 240Overall Length: 13.5 Verified Purchase
This is a great ball hone for my Evo engine rebuild. All that was needed was some hone oil and this thing. Made terrific cross hatch pattern. Highly recommended!
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Shank Diameter: 0.310Part Number: GB31224Max Rotational Speed: 700Size: 3-1/2"Fits Hole Size: 3.5Grit Type: 240Overall Length: 13.5 Verified Purchase
The hone was well packaged and arrived in good order. We put it to use right away. We are working on an 1976 Fiat 124 Spyder thats been parked since 1996. Rings rusted onto cynilder walls. This hone alowed us to clean up the rusted areas in just a few minutes. We now need to assess wheather to re- ring and reassemble or to bore.
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Shank Diameter: 0.310Part Number: GB33424Max Rotational Speed: 700Size: 3-3/4"Fits Hole Size: 3.75Grit Type: 240Overall Length: 13.5 Verified Purchase
Only 3 stars because though it got the job done a few of the stones decided to fly off on a dry run before it even got close to my block. Idk if i will be able to get another 2 engines out of it or even half way through one.
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Shank Diameter: 0.310Part Number: GB41824Max Rotational Speed: 600Size: 4-1/8"Fits Hole Size: 4.125Grit Type: 240Overall Length: 13.5 Verified Purchase
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 didn't have a second thought 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.
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