The pump shaft bearing is a kind of bearing used for the conventional shaft bearing (including shaft, outer ring and steel ball roller) is high carbon chromium bearing steel (GCr15). Due to the smelting of high-quality bearing steel is achieved by vacuum deoxidation, electromagnetic stirring, and less oxide content,so it can withstand greater contact compressive stress and  higher high variable tensile stress .The raceway hardness is58-62HRC. The hardness of the ring raceway is 60-64HRC, and of the steel ball and roller is 61-65HRC. When the shaft and outer ring are made of carburized bearing steel, the raceway hardness is 60-64HRC. The material of the cage is usually reinforced nylon 66, and the material of the sealing ring is generally nitrile rubber. When the requirements are higher, the fluorine rubber sealing ring can also be used.