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.
717806003,ty 2,cagec 04939 mfr ref single material response lubrication material document and classification, 475.0 pounds minimum and 525.0 pounds maximum bearing preload rating, radial load direction, 30.0 degrees nominal contact angle, 11.9994 inches minimum and 12.0000 inches maximum bore diameter