Three-row caged cylindrical roller backing bearing with two integral flanges in the outer ring, cage-guided roller complement and two annular lubrication grooves in the inner ring bore (fig 10).

• 外圈有两个整体式挡边、保持架引导滚子、内圈内孔有两条环形润滑槽的三列带保持架圆柱滚子支承轴承(图10)。