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.
aligning ring features provided, acft eng j-85 end item identification, 1.8502 inches minimum and 1.8504 inches maximum overall outside diameter, radial load direction, 0.9841 inches minimum and 0.9843 inches maximum bore diameter