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.
steel or steel comp 1018 overall material, mil-s-890,class c mil spec 1st material response or aisi assn std 2nd material response overall material document and classification