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, contact bearing seal type, 5.9990 inches minimum and 6.0000 inches maximum bore diameter, radial load direction, aircraft cargo winch end item identification