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.
angular load direction, mil-g-81322 mil spec single material response lubrication material document and classification, 0.2498 inches minimum and 0.2500 inches maximum bore diameter, c calibration designator, 0.0008 inches minimum radial and 0.0013 inches maximum radial internal clearance