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。
11.1 millimeters nominal base thickness, 139.7 millimeters nominal center to center distance between mounting holes along width, 36.5 millimeters nominal base length, 50.80 millimeters nominal height from bottom of base to bore centerline, 1.5000 inches nominal bore diameter