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, 0.2499 inches nominal bore diameter, 0.0007 inches minimum radial and 0.0010 inches maximum radial internal clearance, radial load direction, aim9e/j/p end item identification