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.
radial load direction, 4920-01-093-0521 test stand aircraft end item identification, aligning ring features provided, light bearing preload designation, 2.7559 inches nominal bore diameter