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, 1 shield quantity, 65.0 pounds nominal bearing preload rating, machined retainer fabrication method, 0.0005 inches minimum radial and 0.0009 inches maximum radial internal clearance