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-l-6085 mil spec single material response lubrication material document and classification, angular load direction, 0.0006 inches minimum radial and 0.0010 inches maximum radial internal clearance, 25.0 pounds nominal bearing preload rating, 1.0625 inches nominal bore diameter