Bearing seat is a type of large and extra large bearing seat that can accept comprehensive loads and has a special structure. It has the characteristics of compact structure, sensitive rotation, and convenient device maintenance. Where there are bearings, there must be support points. The inner support point of the bearing is the shaft, and the outer support is commonly referred to as the bearing seat. Due to the fact that a bearing can choose different bearing seats, while a bearing seat can also choose different types of bearings, there are many varieties of bearing seats available. The bearing seat is included in Kuaiyiyou, and many large foreign bearing companies also have their own bearing seat types. However, the markings for the same bearing seat model are not entirely the same in different company samples. For different applications of standard bearing seats, different materials of bearing seats can be selected, such as gray cast iron, ductile iron, and special bearing seats made of cast steel, stainless steel, and plastic.