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AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > What controls the front to back movement of the motor shaft

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 Posted: Sat Aug 1st, 2020 05:12 pm
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Thomas G Guest
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Hello
This may be a simple question but I just don't know the answer.

I have fans that have a large amount of movement (front to back) on the fan blade shaft.
Some have almost zero movement while others are a 1/4 inch. I assume the larger movement is from wear of a part in the fan.

So my question is what controls this movement?

Thanks in advance.
Tom Guest

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 Posted: Sat Aug 1st, 2020 05:55 pm
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Dave McManaman
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Many fans have fiber washers fore and aft. They can degrade and break away. Or get lost on disassembly. There should be some play back and forth so it won’t bind but I think 1/16” to 1/8” at most. Kind of have to try various combinations to try and center the rotor within the stator. 

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 Posted: Sat Aug 1st, 2020 06:43 pm
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Thomas G Guest
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Ok I see. The fan I just took apart has only one washer on the back.

Would a hardware store have that kind of washer or would you know where to buy them?

Thanks
Tom Guest

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 Posted: Sat Aug 1st, 2020 07:26 pm
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Russ Huber
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Center the rotor or armature body inside the field laminations.  Fiber washers ordered from McMaster Carr. You can find them at ACE.

Attached Image (viewed 140 times):

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Last edited on Sat Aug 1st, 2020 07:27 pm by Russ Huber

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 Posted: Sat Aug 1st, 2020 08:41 pm
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Steve Sherwood
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Thomas G Guest wrote: Ok I see. The fan I just took apart has only one washer on the back.

Would a hardware store have that kind of washer or would you know where to buy them?

Thanks
Tom Guest
You need to know diameter of the shaft before you buy any fiber washers.

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 Posted: Sat Aug 1st, 2020 08:53 pm
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David Kilnapp
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Excessive shaft movement on any fan where the spindle connects to gears in the rear of the fan will cause the fan to be quite noisy as the oscillation changes direction. This is especially true in the example of Westy double lever fans and most of the GE oscillators. I usually try different combinations of washers in front of and behind the rotor until I get the quietest operation. You shouldn’t have any more movement than 1/8 to 1/4 of an inch or less. An assortment of different size fiber washers can be had on Amazon.com for less than $20

Last edited on Sat Aug 1st, 2020 08:55 pm by David Kilnapp

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 Posted: Sun Aug 2nd, 2020 11:25 pm
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Thomas G Guest
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Hi Everyone,

Thanks for all the replies.
I found them on Amazon, I will buy a couple of different kits just to have at home.

That should fix the fans I have!

Tom

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