Miniature deep groove ball precision standard

Bearings, and its tolerance zone according to the manufacturing accuracy is divided into ABEC or RBEC ° hc-positie 1 and 9. The higher the level, the higher the precision, narrow tolerance zone. Table CD3. 6 - Table CD3. 10 for centripetal roller bearing and ball bearing inside diameter and outside diameter tolerance. ABEC and RBEC tolerance grade all can be used with ISO level of accuracy, table CD3. 5 shows the ANSUAB MA precision level and 1 so precision level. Also note that table CD3. 6 - Table CD3. The first Ⅱ part in 10 inch tolerance grade is given in the table by the metric conversion tolerance given in section 1. Relative to the ball bearing and centripetal bearing (discussed above The inner ring and outer ring width is basically the same) Taper roller bearings, usually the conical inner ring with different width and annular outer ring. Relative to other 기 centripetal bearing series, tapered roller bearings with different standards. Also, give priority to with the imperial units in North America, tapered roller bearing began to develop and has broad market prospects. The tapered roller bearings produce two kinds of different boundary, one based on English ( 英国应该) , another USES the metric system, each with a different level of tolerance. Metric tolerance system adopted in the design is similar to the other to the spindle bearing, inside and outside allowable deviation from nominal dimensions are all negative direction. However, inch tolerance system inside and outside diameter size of allowable deviation of righteousness are all positive direction. Table CD3. 11 - Table CD3. 15 are single metric tapered roller bearings tolerance table ( Offer reference document [ 61). CD3, table. 16 - Table CD3. Is a list of 20 single inch tapered roller bearing tolerance table ( References [ 7] ) Tapered roller bearing tolerance grade English is divided into four,2,3,0, and the level 0, metric system is divided into K, N, C, B, and A level. Table CD3. 5 shows the metric tapered roller bearings tolerance precision grade and the corresponding relation of ISO precision grade. Because of the tapered roller bearing inner and outer ring with different tolerance grade, with the internal and external figure will also be different. For metric axis bearing, tapered roller bearing with CD3 listed in the table. 21 - Table CD3. 24. For the imperial bearing, the CD3 listed in the table. CD3 ~ 25 table. In the 28. Light, medium and heavy load according to the same table 3. 1. In order to determine the bearing inner ring and shaft and bearing outer ring and bearing in the process of assembling interference fit or a big small clearance fit, must also consider tolerance of shaft, bearing and bearing.