Two single row annular ball bearings selected dimensionally to be a matched pair or set. The ring faces have been specially ground to specified offsets that will produce predetermined preload when mounted. May include a single row angular contact bearing with faces specially ground for duplex mounting.
angular load direction, zzzw criticality code justification, annual ball bearing for quiet operation application to submarine usage departure from cited document, tight internal fit-up designation, 1.5746 inches minimum and 1.5748 inches maximum bore diameter