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.
kubler isoflex lds,cagec 78118 mfr ref single material response lubrication material document and classification, heavy bearing preload designation, 120.0 pounds minimum and 150.0 pounds maximum bearing preload rating, angular load direction, 2.0621 inches minimum and 2.0625 inches maximum bore diameter