Quote:
Originally Posted by Homeoboxter
It’s actually the opposite, since the bearing wear is twice as fast in the single row because of the double load compared to the dual row. So the single row starts pitting much sooner. DOF would make sense if the failure was the result of lack of lubrication. But that’s not the case in a bearing that’s swimming in oil all the time.
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The theory on the DOF is the lack of lubrication causes heat build up, leading to galling and failure. As the dual row has twice the contact area, the heat build up in the bearing should be both faster and to a higher temp, which should be leading to its failure sooner than the single row. But that is not what happens in the real world, were single rows fail at a rate near ten times that of dual rows.