To facilitate efficient lubrication, all multi-row full complement cylindrical roller bearings have lubrication holes, or an annular groove and lubrication holes in the outer ring.

• 为了方便高效率的润滑,所有多列满滚子圆柱滚子轴承在外圈上都有润滑孔,或一个环形槽和润滑孔。