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。
straight bore shape, 0.2312 inches minimum and 0.2360 inches maximum overall width, 0.2360 inches minimum and 0.2362 inches maximum bore diameter, 0.3507 inches minimum and 0.3513 inches maximum smallest outside diameter, abec no.5 standard tolerance designation