DIYbanter - View Single Post - Electric fan motor re-re-re-repair

Stormin Mormon[_10_]

On 7/31/2014 8:12 PM, wrote:

The way it was explained to us is that these bearings are made of
porous bronze and empregnated with oil in the manufacturing process.
Over time the volatile parts of the oil evaporate away leaving the
gummy part. You can put more oil in there are free it up for a while
but the gum is still there.
The only thing that really works is dissolving out all the gum with a
solvent and getting oil in there at the same concentration it was.
That is easier said than done without removing the bearings and
working in a tank.

They do sell common sizes pretty cheap at Ace Hardware but I am not
sure it is worth doing for a $10 fan.

Thank you. That helps explain why re-oil only lasts a
short time. The heavier fractions are still in the
bearing.
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Christopher A. Young
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