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