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Post by Deleted on Mar 26, 2009 1:27:18 GMT -5
Whoa half a bottle is way too much. That probably why you had oil accumulated at the bottom of you motor. I wonder how you opened that motor they are so hard to open. On the picture the bearings of that brown SMC motor seems very hard to get access. I don't see any hole. A good way to clean the top bearings of a direct drive motor when they are dirty it to use a damp cotton swab. BTW I updated my oiling thread. Dont listen to Jean, he is not an oiling expert. There is no problem with excess. Seems like you already have some good ideas. Paper cutouts and rubber washers can do wonders. SMCs use bushing bearings which are less effective than ball bearings. Probably not worth replacing, although you can open them up and clean the grit out with 0000 steel wool and WD40. Oiling instructions are here: www.ceiling-fans-n-more.com/ceiling-fan-oiling.php
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Post by az2000 on Mar 26, 2009 21:56:21 GMT -5
Seems like you already have some good ideas. Paper cutouts and rubber washers can do wonders. I'm really happy with the first SMC fan I cleaned, oiled, added rubber cushions to the fan blades (and where the blade mounts to the motor). It's running very quietly. A little bit of a motor hum when a certain blade turns to a certain point. I've read that's common. The only other thing I would do is put something on the inside of the decorative housing to deaden the sound. That housing is very acoustic. If I tap it, it makes a good, rich sound. I'm thinking it might be contributing to the motor hum being audible. I don't know what I'd put inside the housing. I wouldn't want it coming loose and tangling up with the motor. I was thinking something like the plastic "dip" stuff they sell at the hardware store to rubberize screwdriver handles. Paint that on the inside of the housing just to tone down the resonance it has. Maybe I'm obsessing. But, that housing really has a good ring to it. I bet it amplifies any noises inside of it. SMCs use bushing bearings which are less effective than ball bearings. Probably not worth replacing, although you can open them up and clean the grit out with 0000 steel wool and WD40. I may not understand the difference between bushing and ball bearings. But, my two SMC Emperors have what look like ball bearings. Donut shaped, with visible balls inside. I've read that ceiling fans used sealed bearings. But, these aren't sealed. I could get to the bottom bearing. The balls were visible. The original grease was solidified like wax. Using Zoom Spout oil (flushing the bearings occasionally over a day or two) seemed to rejuvenate the grease. Right now I don't have any reason to replace the bearings. But, I'm still not clear how the top flange comes off the shaft. I tried Liquid Wrench and tried to unscrew it (after removing the set screws). But, it wouldn't budge. I'm thinking it's pressed on. For example, there are two set screws. If it was threaded on, I'd expect only one set screw. When there are two, it seems to be to lock a slip joint from rattling if the joint becomes loose. Have you ever seen a ceiling fan with the flange at the top of the shaft that's pressed on? Mark
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Post by Deleted on Mar 27, 2009 9:55:57 GMT -5
The top flange is threaded onto the shaft. They may be reverse threads. Be VERY CAREFUL with the liquid wrench.
As for the housing, putting vibration isolating material (rubber washers) between it and the flange is all you need.
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