不含滾珠軸承、滑動軸承或滾柱軸承的單件或多件式組件。其設計旨在滿足各種或特定的安裝條件。對於帶有軸承的組件,請參閱滾珠軸承單元;滑動軸承單元;以及滾柱軸承單元。
0.313 inches nominal bolt circle diameter, 0.1870 inches minimum and 0.1880 inches maximum flange thickness, motor, spanwir end item identification, 3.2500 inches minimum and 3.2600 inches maximum bore diameter, 5.9000 inches minimum and 5.9030 inches maximum housing diameter