A bearing assembly system adapted for use on a rock crusher having a main frame, a main shaft, an eccentric and a crushing head. The bearing assembly system comprises a first bearing ring which is disposed around the main shaft, a second bearing ring which is disposed adjacent to the first bearing ring, and a means for conveying fluid to at least one of the first bearing ring and the second bearing ring. In the preferred bearing assembly system at least one of the first bearing ring and the second bearing ring comprises a fluid depression. The preferred method further comprises conveying fluid from the means for conveying fluid to at least one of the first bearing ring and second bearing ring.