The port's large lifting equipment, including shore container cranes, gantry cranes, portal cranes, etc., are the main lifting equipment for port loading and unloading operations. With the continuous development of the lifting machinery technology, the requirements for various working conditions are improved, and at the same time, the technical content of each part of the equipment is required to be improved. The bearing is used as the main component in the machine to support the fixed shaft and bear the load, and its effect is obvious. If there are no types of bearings, the various actions of the equipment will not work properly. The large cranes used in the harbor have long been working in maritime climates with large salt spray, high humidity and large temperature differences. The large cranes working in the river port will also be affected by the industrial atmosphere and the harsh weather. When the large equipment of the port is in operation, multiple actions are carried out at the same time, and multiple loads are superimposed at the same time, which have a great influence on the use of the bearings. In order to understand the customer's use situation, according to the customer's requirements, the series will produce products that meet the customer's requirements and reach the international advanced level.