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.
mil-l-6085 mil spec single material response lubrication material document and classification, loose internal fit-up designation, 4.0 pounds nominal bearing preload rating, radial load direction, 0.2500 inches nominal bore diameter