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.
mil-g-23827 mil spec single material response lubrication material document and classification, 40.0 pounds nominal bearing preload rating, 1.4996 inches minimum and 1.5000 inches maximum overall outside diameter, 1.0623 inches minimum and 1.0625 inches maximum bore diameter, angular load direction