A comparatively flat rigid item, with or without a centrally located aperture, designed to hold an annular bearing or a sleeve bearing in a fitted inclosure. It must have drilled and/or tapped holes for mounting purposes. Excludes:end bell, electrical rotating equipment.
1.680 inches minimum and 1.700 inches maximum aperture diameter, round, unthreaded mounting hole type, 28.0 rockwell c minimum and 34.0 rockwell c maximum hardness rating, steel comp e4340 or steel comp 4340 overall material, 3.590 inches minimum and 3.620 inches maximum outside diameter