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 Posted: Tue Mar 27th, 2018 02:03 pm
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Marryann Claritan
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so my favorite fan in my collection is a zero 1250r, not because it is a good fan neither is it worth a lot but i love it because one it was the first fan i owned and two i love the design, so please with this out of the way please do not tell me i already know it is not that great...ok now... so i opened it up to clean and oil the other day because when i was using the fan it is getting really hot and i noticed the copper windings are actually black. now i would think it is shorted but it still seems to work fine and it can run for as long as i want it too but it just gets really hot. i had had the fan a long time and use it daily and it gets quite warm normally but it is not usual for it to get as hot as it is but i blew it out with ir and it is not dirty or anything. is there a way i can fix this, can i do something and rewind the motor myself or is it shot? I can attach a pictre of the windings if needed but i dont think it would be too helpful because it is just windings that are supposed to be copper and they are black 

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 Posted: Tue Mar 27th, 2018 02:47 pm
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Lawrence Smith
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what type of oil do you use? also the bearings might be clogging up reducing the amount of oil to the rotating surfaces. As for rewind I would just search for a similar fan & put your parts on it & keep it going, they made a lot of these & usually can be purchased for less than $20. does the fan smell burnt? it is over 50years old & might be on it's last leg. Good luck 

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 Posted: Tue Mar 27th, 2018 03:44 pm
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Marryann Claritan
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there is no burn smell and i use the 3 in one motor oil in the blue can. as for the bearings they spin very freely and take about 50 seconds to spin down. 

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 Posted: Tue Mar 27th, 2018 04:59 pm
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Richard Daugird
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My buddy loves those little "dime store" fans, as I like to call them. In fact he got several from me. They all seem to run hot, but that is relative. Get a good digital thermometer. It may feel really hot, but rule of thumb, as long as the motor is less than 40 degrees celsius above ambient (room temp), you are O.K. Example, if room temp is 70 degrees F, that's 21 degrees C. Add 40 C, which is 61, that equals 141 Fahrenheit! It will feel very hot to touch, but as long as you are a little below that, you are probably not damaging the fan. Others feel free to correct me if I'm wrong.

Last edited on Tue Mar 27th, 2018 05:00 pm by Richard Daugird

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 Posted: Tue Mar 27th, 2018 05:18 pm
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Richard Daugird
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Some can run even hotter, see the bottom right:


"Rise 55* C" so 55+21=76*C, or 168.8 F.

Last edited on Tue Mar 27th, 2018 05:21 pm by Richard Daugird

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 Posted: Tue Mar 27th, 2018 08:18 pm
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Lawrence Smith
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Another cheap tool is a kilowatt meter, Home Depot used to sell them for less than $25, it will tell you the amp & watts draw of your fan, match it tothe tag rating, 10% is a rule of thumb for variance

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 Posted: Tue Mar 27th, 2018 08:21 pm
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Marryann Claritan
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wat i think i will do is i have a fused plug on it so if something goes wrong i wont die, but anyway i HAVE CLEANED AND OILED IT AND IF SOmething goes wrong i can buy a beat up one cheaply and i will put in a new motor.

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 Posted: Tue Mar 27th, 2018 09:01 pm
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Richard Daugird
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I test all my fans with a Killowatt, so I know FOR SURE how many amps they pull so I can safely use a Variac to control speed.

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 Posted: Sat Mar 31st, 2018 12:48 am
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Marryann Claritan
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hi yes i think i found an issue, there is a place where the wire have had the coating warn off and they are touching, if i put a piece of electric tape in between them it seems to not get so hot so quickly, what should i do. could i somehow re coat the wire?

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 Posted: Sat Mar 31st, 2018 02:44 am
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Jamie Williams
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Marryann,

I sent you a PM.

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 Posted: Sat Mar 31st, 2018 02:46 am
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Kevin Massey
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Hi Marryann:

You can get liquid electrical tape. That should fix the rubbed spot. Running too long with windings shorted will eventually ruin your fan.

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 Posted: Sat Mar 31st, 2018 02:44 pm
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Marryann Claritan
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i was thinking about getting some liquid tape to put on it but did not know it it would melt when the fan is in use or if it would stop air flow to the windings and cause it to overheat. 

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 Posted: Tue Apr 17th, 2018 03:11 am
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Jeff Jones
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A re-varnish might help if its not too shorted yet. They make a spray on varnish to recoat the windings with.

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