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.
0.2499 inches minimum and 0.2500 inches maximum bore diameter, aligning ring features provided, 0.0007 inches minimum radial and 0.0010 inches maximum radial internal clearance, aime9e/j/p end item identification, radial load direction