How to choose the bearing material of automobile water pump?

The selection of materials for automobile water pump bearings plays a vital role in the quality and performance of pump bearings. According to its working principle and raceway hardness, nitrile nitrile rubber is generally used. If the requirements are higher, fluorine rubber seals can also be used.

The steel selected for conventional automotive water pump bearings (including shafts, outer rings, steel ball rollers) is high-carbon chromium bearing steel (GCr15). Automobile water pump shaft bearing

Because high-quality bearing steel is smelted through vacuum deoxidation, electromagnetic stirring, and less oxide content, it can withstand greater contact pressure stress while also withstanding greater high variable tensile stress. After heat treatment, the hardness of the shaft raceway It is 58-62HRC. The hardness of the ring raceway is 60-64HRC, and the hardness 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 to make high-quality automotive water pump bearings.