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WTB 27666 oscillator arm  Rate Topic 
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 Posted: Thu Apr 29th, 2021 01:54 am
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Patrick Ray
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Had a shipping mishap with a 27666. Got donor parts coming except one. I need the oscillator arm. I was hoping to be able to straighten it out but it's got stress cracks. Please let me know if you have one.



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 Posted: Thu Apr 29th, 2021 03:34 am
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Russ Huber
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Braze over the cracks and use a dremel with grinding stone to clean up the brazing and reshape it. Those links are few and far between to come by.

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 Posted: Fri Apr 30th, 2021 12:58 pm
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Patrick Ray
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I'll have to give that a shot. Brazing is one thing I've never attempted.

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 Posted: Fri Apr 30th, 2021 06:57 pm
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William Dunlap
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Those are made from cast bronze. Brazing may take the same temperature as the bronze will melt. I would silver solder it, but not before attempting to straighten it. The one on my 27666 was bent worse than that and I straightened it cold without breaking it.
Cheers,
Bill

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 Posted: Fri Apr 30th, 2021 09:00 pm
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Russ Huber
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William Dunlap wrote: The one on my 27666 was bent worse than that and I straightened it cold without breaking it.
Cheers,
Bill





I had one bent in a 90 degree angle, and another one slightly worse than Patrick's example. I heated the 90 degree angle bend example and attempted to bend the other cold. I clamped both examples in a vice and slowly tried to bend them back into shape. Both of them fractured during the attempt. I have bent others into shape successfully as well.


Patrick, before you start bending, flip a coin and call it. Those are your odds of success.  :D

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 Posted: Sat May 1st, 2021 01:06 pm
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Patrick Ray
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Can I braze one side of my coin to give me a better chance of success?

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 Posted: Sat May 1st, 2021 03:03 pm
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Russ Huber
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Patrick Ray wrote: Can I braze one side of my coin to give me a better chance of success?

My bad on advising the brazing, as I have never brazed one, and Bill has a good point as to the link melting.


If yours is bent and has stress fractures, bending it back to its original state would make me nervous. Sorry I am not of much help. 


FWIW...Alex Rushing in past post has replaced that specific link with a modified section of brass stock. Not original, but makes the fan functional.


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 Posted: Sat May 1st, 2021 09:30 pm
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Jerry Bravi
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In case anyone needs this replacement link in the future, I recently have made a small quantity of these for the Emerson big motors such as the 27666 and the 29666.  May also fit a couple other model, not sure?  Anyway, I make these from cold rolled steel plate stock, form, mill, press in brass bushings,  and prime and paint them with automotive black enamel.  The cost is $70.00 plus $5.00 shipping.  Thanks, Jerry

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 Posted: Sun May 2nd, 2021 12:53 am
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Russ Huber
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Jerry Bravi wrote: I make these from cold rolled steel plate stock, form, mill, press in brass bushings.


You could use that for a tie rod.  :clap: :D

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