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.
0.2500 inches nominal bore diameter, mil-l-6085 mil spec single material response lubrication material document and classification, 1.0 pounds nominal bearing preload rating, radial load direction, 0.0004 inches minimum radial and 0.0008 inches maximum radial internal clearance