Fiber brush for circuit boards

ohg...@gmail.com

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Oct 15, 2022, 9:55:31 AM10/15/22

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Chemtronics makes a flux remover that comes with a small brush that attaches to the can for spot application and cleaning. This brush is *very* stiff and is not affected whatsoever by any solvent that I've used it with and lasts until the time I misplace it. They just don't wear out. Well, I just misplaced mine again and I use it constantly. I hate to keep buying the flux remover that I don't generally use just to get a brush.

https://www.amazon.com/Chemtronics-Flux-Off-Concentrate-Remover-Aerosol/dp/B01N2KD6I9/ref=sr_1_2?keywords=chemtronics+flux&qid=1665841886&qu=eyJxc2MiOiIwLjAwIiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sr=8-2

I'd like to buy a few to keep on hand in case I lose another, but I don't want to spend a hundred bucks for 5 brushes that are worth a couple of bucks each.

Does anyone know of a similar brush that I can buy to replicate the function and durability of the Chemtronics brush? I sent Chemtronics an email but I doubt they will sell the brush separately, otherwise I'd buy a dozen or so...

Thanks.

Jeff Liebermann

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Oct 15, 2022, 2:14:36 PM10/15/22

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Looks like Chemtronics sells a flux cleaning system based on that
brush but doesn't sell the brush separately:
<https://www.chemtronics.com/brushclean-system>
<https://www.chemtronics.com/spot-cleaning-flux-residues-using-brushclean>

If it's fiberglass bristles, you could just buy some "acid brushes":
<https://www.google.com/search?q=acid+brush&tbm=isch>
and insert your favorite bristles borrowed from a scrub brush. The
original "horsehair" bristles are probably too thin.

This might work, but the bristles appear to be too large diameter:
<https://www.zoro.com/schaefer-brush-mfg-llc-fiberglass-flux-glue-dope-brush-tin-10033/i/G9502757/>

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Jeff Liebermann je...@cruzio.com
PO Box 272 http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann AE6KS 831-336-2558

rbowman

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Oct 15, 2022, 2:27:37 PM10/15/22

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amazon.com/Fiberglass-Scratch-Brush-Pen-applications/dp/B07S3RCTGZ/

The Amazon link is for reference. Auto body repair shops use scratch
pens for cleaning up stone chips and so forth so you can find them at
any autp parts store.

Bob F

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Oct 15, 2022, 4:08:31 PM10/15/22

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https://www.amazon.com/flux-brush/s?k=flux+brush

John Robertson

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Oct 16, 2022, 2:31:08 AM10/16/22

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We bought some of those, they are somewhat soft, like paint brushes, not
very stiff as the OP is looking for.

John :-#(#
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Andy Burns

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Oct 16, 2022, 3:03:46 PM10/16/22

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ohg...@gmail.com wrote:

> Does anyone know of a similar brush that I can buy to replicate the function and durability of the Chemtronics brush?

Any good?
<https://www.ebay.co.uk/itm/251948347071>

Adrian Caspersz

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Oct 19, 2022, 11:14:59 AM10/19/22

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On 15/10/2022 14:55, ohg...@gmail.com wrote:
> Chemtronics makes a flux remover that comes with a small brush that attaches to the can for spot application and cleaning. This brush is *very* stiff and is not affected whatsoever by any solvent that I've used it with and lasts until the time I misplace it. They just don't wear out. Well, I just misplaced mine again and I use it constantly. I hate to keep buying the flux remover that I don't generally use just to get a brush.

Not too sure what the exact material composition of the fibre you are
referring to, but I've used glass fibre brushes in the past which create
dusty sharp particles that are very painful if ye are unlucky to get
them trapped in ya skin. Not my favourite tool.

--
Adrian C

Peter W.

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Oct 19, 2022, 2:46:47 PM10/19/22

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This venue exists to offer the most complicated process for the simplest problem, often not even related to the original problem, and then only after endless discussions on irrelevant sidebars.

Ladies and Gentlemen, boys and girls and children of all ages: Go to a decent plumbing supply house, and or an old-fashioned hardware store (even an ACE). Ask to see what they have by way of small brushes, The ACE nearest our summer house has at least ten (10) options, from very soft spring-brass bristles to peel-the-chrome-off-a-trailer-hitch steel bristles, both in toothbrush and paint brush configurations, metal, wood and plastic, and, for the record, including some natural bristle options as well. Then, using your eyes and fingers, choose the best option(s) for your specific need (or needs).

Peter Wieck
Melrose Park, PA

ohg...@gmail.com

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Oct 19, 2022, 4:47:03 PM10/19/22

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All I can tell you is the material is black, it's not metallic, it's not natural hair, it's very stiff, and not only does it not shed any particles whatsoever, it doesn't wear out. A bit. At all. It also doesn't react to IPA, acetone, or toluene. I've seen those fiberglass pens that come with 10 refills. The Chemtronic brush bristles are only a few mm long but they don't wear down.

Chemtronics answered my email and said they don't sell the brushes separately as I suspected. I have been unable to find them by searching images or found any other product that uses them.

For now I've cut some acid brushes down to about 5 mm to duplicate the stiffness (more or less). I guess I'll have to buy some cans of Fluxoff to get a couple more. I think I'll drill them and attach a long lanyard to them so I'm less likely to misplace them in the future.