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.
loose internal fit-up designation, angular load direction, 20.0 millimeters nominal overall width, 50.0 millimeters nominal bore diameter, 90.0 millimeters nominal overall outside diameter