Piston pump cross fitting bearing

A piston pump cross fitting bearing relates to the improvement of a piston pump cross fitting bearing of a feeding pump for dissolving out alkaline liquor during the process of producing alumina. The piston pump cross fitting bearing comprises a bearing outer ring, a rolling body roller, a bearing holder and a pin shaft, and is characterized in that firstly, the wall thickness of the outer ring of the bearing is 17mm, secondly, the diameter of the rolling body roller is phi 35, and each line comprises 18 rollers. The piston pump cross fitting bearing reduces the diameter of a rolling body through changing the size of the wall thickness of the outer ring of the bearing, increases the quantity of the rolling bodies, and guarantees the bearing capacity of the bearings, thereby prolonging the service span, and simultaneously lowering cost of spare parts. The piston pump cross fitting bearing provides reference basis for domestic production of imported spare core parts.