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。
zzzw criticality code justification, light bearing preload designation, 1.3778 inches minimum and 1.3780 inches maximum bore diameter, annual ball bearing for quiet operation application to submarine usage departure from cited document, standard internal fit-up designation