The meaning of the bearing

Due to a bearing can choose different bearing seat, and a bearing seat at the same time can choose different types of bearings, as a result, many varieties of the bearing. Bearing fast easy best has included, many foreign large bearing companies also have their own housing, catalogue. But the same bearing model in different companies in the sample tag is not entirely the same. For a standard bearing different applications, can choose different material bearing such as grey cast iron iron, nodular cast iron and cast steel, stainless steel, plastic special bearing.