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AFCA Forums > Antique Fan Collectors Association > Buy-Sell-Trade > Replacement Stator for an Emerson Cf-28

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Replacement Stator for an Emerson Cf-28  Rate Topic 
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 Posted: Fri Jul 26th, 2019 02:51 am
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Robert Winter
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Looking for a replacement stator for an Emerson CF-28. Any folks out there have one they would sell?

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 Posted: Fri Jul 26th, 2019 06:22 pm
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Don Tener
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Those are pretty rare. If you have a non working one you might be better off having it rewound. I think Dan Nguyen has rewound them before.

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 Posted: Sat Jul 27th, 2019 12:52 am
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Robert Winter
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Yeah, I realize it is a long shot. I already checked with him and he could not do it. The whole stator is in pretty rough shape, which was why I was looking for one someone may be parting out another CF-28

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 Posted: Sat Jul 27th, 2019 03:48 am
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Don Tener
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Robert Winter wrote: Yeah, I realize it is a long shot. I already checked with him and he could not do it. The whole stator is in pretty rough shape, which was why I was looking for one someone may be parting out another CF-28You might want to try it your self. Just read up on how to do it. There are lots of threads on rewinding motors here and I think you might find that you can do it. I think it is your best bet for getting it running again. Also it already doesn't run so you really got nothing to loose?

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 Posted: Sat Jul 27th, 2019 03:58 am
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Robert Winter
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Unfortunately the stator has major rust and damage and is not salvageable  

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 Posted: Sat Jul 27th, 2019 07:49 am
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Don Tener
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Lets see a pic? If it is really that bad I would be willing to give it a try, I like a good challenge. I just rebuilt a commutator on an 1892 Crocker Wheeler that was totally destroyed. That's if you don't mind sending it to me?

Last edited on Sat Jul 27th, 2019 07:49 am by Don Tener

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 Posted: Sat Jul 27th, 2019 11:36 pm
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Evan Atkinson
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Robert Winter wrote: Unfortunately the stator has major rust and damage and is not salvageable  
Robert, I know the feeling. This past year, I finally, completely unglued a rusty, crusty Marelli Breva (DC, four blade Italian) ceiling fan motor from itself by way of electrolysis. Here's the thread: http://afcaforum.com/view_topic.php?id=42920

Once I was able to extract the armature and examine it, I realized it was likely a lost cause. An armature (or stator) that develops rust bloom between the laminated layers of iron stampings will never operate the way it did when new. Those stampings are sealed and insulated from one another with layers of electrical insulating varnish and if they rust, the varnish shell has broken and you're getting metal-metal contact between lamination layers. Running hot, fluctuating magnetic field, just some of the symptoms of rust interference. Without a new armature for my Breva, there's no hope for it.


Unlike the Breva example I gave you, the CF-28 is a different beast. You're not dealing with a drum-style, cylinder-shaped core of stampings with a shaft pressed through them: your stator is a large ring of lamination layers, held together by way of rivets (I think) around the perimeter edges.


This process would have to be done carefully, but if we're talking scarce, hard-to-find parts, I'd recommend you try to use what you have if at all possible. Remove the rivets holding the stator layers together, then one by one, run each lamination layer through an electrolysis tank to remove as much rust as possible, taking care to wire brush clean each lamination. Then, you'll dip and dry each stamping in new electrical varnish and when they're all clean, you'll re-rivet the entire assembly back together. It can be done, I've seen it.


Last edited on Sat Jul 27th, 2019 11:41 pm by Evan Atkinson

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