Railway wagon loaded with bearing code

Railway wagon loaded with bearing code - 2019 04 - Bearing code according to the national standard GB/T272-08 1993, bearing code by the basic code, front-end code and post code. 1. Bearing the basic code basic code basic types, structure and size of said bearing, is the foundation of bearing code. Rolling bearing ( Except for needle roller bearing) The basic code by bearing type code, size series of codes, codes of inner diameter. Bring about bearing type code in Numbers or letters. Bring the diameter series is refers to the corresponding to the same bearing inner diameter size series; Width series is corresponding to the width dimension of the same diameter bearing series series. Thrust bearing with high series corresponding to the width of centripetal bearing series. Bring about inner code to nominal diameter of the bearing. Bring about basic code compiling rules: when bearing type code in the code letters, layout should be with said bearing size series codes, codes of inner diameter or installed with feature sizes between the number of empty half from Chinese characters. 2. Railway wagon loaded with bearing code for railway truck packed with 352226 x22rz type double row circular cone roller bearings, for example: bring about 352226 x2 - 2 rz type double row circular cone roller bearings is our country railway wagon wheel on the use of rolling bearing, its symbol meaning is: (1) no front. Bring '35' is bearing type code, said the double baffle in the inner ring with double row circular cone roller bearings. Bring about '2226' four digits, said '26' inner diameter of 26 & times; 5 = 130 ( mm） ； '22', respectively is bearing width series code and diameter series code. Bring 'X2 said outside the outer circular cylindrical shape. Bring 2 rz is post code. Note: according to the characteristics of the industry, outside diameter, Or width) Non-standard code omitted; The rear with a letter said structure change, such as 353130 a, 353130 b. （ Source: the resources of railway vehicle platform)