一種通常呈圓形的剛性部件,用於容納軸承。它用於定位軸承,但不會包裹軸承或限制軸承的運動。
steel comp 303 overall material, astm-a-582,type 303,condition a assn std single material response overall material document and classification, vaneaxial fan motor assembly (type a) fan size 4185ax(s4) end item identification, insert bearing (press in type) part name assigned by controlling agency