滾珠軸承或滾柱軸承的內部組件,為減摩軸承的滾動元件提供接觸面。
0.9000 inches minimum and 0.9100 inches maximum overall outside diameter, 0.7872 inches minimum and 0.7874 inches maximum bore diameter, 0.6200 inches nominal overall width, straight bore shape, ams 6490 assn std single material response inner ring material document and classification