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AFCA Forums > Antique Fan Collectors Association > Post-1950 (Vintage) > Arvin fan: How to tighten blade assembly on motor arbor

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Arvin fan: How to tighten blade assembly on motor arbor  Rate Topic 
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 Posted: Sat Jan 2nd, 2021 12:56 am
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Ken Anderson
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This follows http://afcaforum.com/forum5/61721.html.
After pulling the blades, I realized that I couldn't balance three blades the same way that I could two blades.  And, I can't think of a reason why the blades would go out of balance.
But, I might have discovered the problem.  The nut that holds the blades to the arbor is not firmly attached to the blades.  The nut on the outside, and a washer on the inside, are held with intervening rubber washers to the blades with a pressure fitted flared sleeve. I assume this is an extension of the outside nut.  You can see from the attached videos (https://youtu.be/Y_t2xYQjWH8 and https://youtu.be/Evt_ZXmWmcY) that the whole assembly is loose, so that it spins within the blades, and so that it wobbles within the blade hole.

Any suggestions as to how I can tighten this up?

Thanks,
-Ken

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 Posted: Mon Jan 4th, 2021 06:44 am
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Levi Mevis
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the blade hub (which is the proper term for the spot you are describing) sometimes will make their way loose from the blade spider because someone at some point in time in these old fan's history would of removed the blade assembly from the motor to do maintenance to the motor and they may have forced the blade and bent the blade assembly (whether at the blade itself or at the spider), which if that's the case you'll need to straighten the blades and or the spider, which you can do that using your hand. the blade being "wobbly" when it runs is called "out of clock" (despite the name doesn't have anything to do with clocks or watches) which means that one blade isn't running "true" or "straight" compared to the rest of the blades, in which case the only repair for that is trying to find the "out of clock" blade and then whacking it back into true with a small 2x4 board.
I hope this helps. 

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 Posted: Mon Jan 4th, 2021 10:35 am
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Mark Olson
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If the blade is loose on the hub, and there was no rubber there originally, then I would braze or weld the hub back to the blade, three spot tacks should do it. If there was rubber in there that is now gone, I would attempt to fit new rubber using what ever I could find about the right size, automotive grommets may be a good source. If the new rubber approach is not feasible, then welding is the only option I can think of, possibly JBweld.

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 Posted: Wed Jan 6th, 2021 07:25 pm
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Tom Zapf
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KEN, CAN WE SEE A BIGGER PICTURE OF THE BLADE? THAT SURE LOOKS LIKE THE PROBLEM HAD WITH  CHELSEA (AND REBADGED FRESHNDAIRE) BOX AND WINDOW FANS IN THE MID 50S. THE RUBBER CUSHION SPACERS IN BETWEEN THE PRESSURE MOUNTS GET SOFT AND TURN IN TO RUBBER GOO AND IT SHOOTS OUT ALL OVER LEAVING THE BLADE AS YOURS. NOW THAT BEING SAID, ROB DUFFY HAS A METHOD TO SECURE THE BLADE TO THE HUB, SO YOU CAN SEND HIM A PM FOR ADVICE

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