Originally Posted by
Rrumbler
I can't remember the term for it, but a rotating bearing operating at its design speed, and with correct bearing clearances does not really need the pressure of lubricant being forced between the bearing surfaces internally to operate quite efficiently; all it needs is a constant source of oil getting onto the rotating surface, and it will actually draw the oil into the bearing once the shaft is turning at its normal speed, and thus, keep that cushion of oil in the bearing.