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。
2.5020 inches nominal bore diameter, 0.1580 inches nominal overall width, steel comp e52100 overall material, 66,aisi/sae e52100 fed std single material response overall material document and classification, 3.5570 inches nominal outside diameter