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.
medium bearing preload designation, 2.9996 inches minimum and 3.0000 inches maximum bore diameter, standard internal fit-up designation, angular load direction, 15.0 pounds nominal bearing preload rating