一種組裝單元,由包含單列或多列滾珠軸承的外殼組成,設計用於滿足各種或特定的安裝條件。
0.7872 inches minimum and 0.7874 inches maximum bore diameter, 0.4674 inches minimum and 0.4724 inches maximum assembly overall length, fixed block type, rigid alignment type, 2.1600 inches nominal bolt circle diameter