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.
tight internal fit-up designation, annual ball bearing for quiet operation application to submarine usage departure from cited document, zzzw criticality code justification, 3.7399 inches minimum and 3.7402 inches maximum bore diameter, medium bearing preload designation