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Mcgraw edison box fan  Rate Topic 
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 Posted: Sat Jun 27th, 2020 09:12 pm
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Jeff Edwards
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This is the rotor from a box fan I picked up for free at a yard sale because "it didn't work".  I did get it working after I oiled it a few months ago and it seemed to be just fine.  But now I turn it on and it makes all kinds of noise and does not sound good at all.  So I took it apart to inspect it.  The bearing shown in the picture measures .377 id, the shaft is .375.  Is this acceptable?  I have to kind of force my micrometer to get .377 so it may actually not be quite that big.  Should I just soak it in Royal Purple and put it back together?  The bearing oil holder foams look ok, they didn't fall apart when I took them off.  Rotor itself looks ok on the side in the bottom picture but the other side shown in the top picture is slick so that you can't see the lines anymore.  Is that bad?   These are recent pics my camera date is off.  Thanks for any help you can give me.  The fan in the attached picture is exactly like the one I have.  update:  I put it back together and it seems obvious to me that the bearings are worn out.  Do these bearings have to be custom made or can I use oilite stock?

Attached Image (viewed 154 times):

box fan.jpg

Last edited on Sun Jun 28th, 2020 08:13 pm by Jeff Edwards

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 Posted: Mon Jun 29th, 2020 01:06 pm
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Tom Zapf
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WHAT KIND OF NOISES? 

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 Posted: Mon Jun 29th, 2020 01:16 pm
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Jeff Edwards
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The rotor is rubbing the stator. Should I find a replacement motor or have someone rebuild the one I have? Thanks for replying.

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 Posted: Wed Jul 1st, 2020 04:48 am
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David A Cherry
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spinning in a drill, use sandpaper to reduce the diameter. it doesn't take much, this is of course if you don't already have a lath..

Last edited on Wed Jul 1st, 2020 04:49 am by David A Cherry

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 Posted: Mon Jul 6th, 2020 07:40 pm
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Jeff Edwards
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The fan is working beautifully again. What I should have done to begin with (before I took it apart), is just turn the motor 180 degrees inside the box. But alas I got it lubed up and turned the bearings 180 so she is humming along again. Hopefully for another 40 years or so! Thank you for the awesome forum.:bigfan:tumbs

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 Posted: Mon Jul 6th, 2020 08:25 pm
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Richard Daugird
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This is what one looks like with new paint:





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 Posted: Mon Jul 6th, 2020 09:26 pm
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Levi Mevis
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Richard Daugird wrote: This is what one looks like with new paint:






Richard you're missing the speed control badge, you should have a little round metal plate under the speed control knob that says Off, High, Med, Low.

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 Posted: Mon Jul 6th, 2020 09:51 pm
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Richard Daugird
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Yeah, it was shot.



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