兩個單列環形球軸承,尺寸經選定,組成匹配對或匹配組。軸承套圈表面經過特殊研磨,達到規定的偏置量,安裝時可產生預定的預緊力。可能包含一個單列角接觸軸承,軸承套圈表面經過特殊研磨,適合雙列安裝。
7.5 pounds nominal bearing preload rating, radial load direction, c28 calibration designator, 0.8748 inches minimum and 0.8750 inches maximum bore diameter, 0.0003 inches minimum radial and 0.0008 inches maximum radial internal clearance