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.
0.0004 inches minimum radial and 0.0020 inches maximum radial internal clearance, beacon 325,fscm 29700 mfr ref single material response lubrication material document and classification, 20.0 pounds nominal bearing preload rating, 15.00 millimeters nominal bore diameter, radial load direction