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Originally Posted by What's_nitro?
Rootar, why is that exactly? Does the ceramic chip when it encounters dirt? I would think not since the ceramic balls are much harder than the dirt. If anything I would think they don't run them because they wear out eventually and they cost much more to replace... Which, if you aren't sponsored by a bearing company, is a bad thing.
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the problem is that the ceramic balls are TOO hard. something has to wear in a bearing, because there is no eliminating friction so a ceramic bearing has balls that are alot harder than the race they are running in, so any contaminents will impregnate themselves into the race, and the race will wear out quicker due to the difference in hardness. now an all steel bearing is much more balanced as to what will wear out (everything as a whole) they are also more likely to dislodge contamiments, and what they dont dislodge they "eat" or impregnate so that its not a problem. and with ALL surfaces being of equal hardness there is much less wear to all the components when compared to a ceramic bearing, there is more to it than that,but i dunno how to explain it, im looking for some place that better explains the science behind it. ceramic bearings have their place but just not in electric motors.
and besides call and ask steve neu or his repair guys they'll tell NOT to use ceramic bearings, hands down, and i believe the monster mike himself also warned me on the phone of that same thing (not to use ceramic bearings)....