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。
fire truck,allison div gmc,ht700 series auto transmission end item identification, 3.5000 inches nominal outside diameter, 2.8000 inches minimum and 2.8150 inches maximum bore diameter, 0.1900 inches minimum and 0.2110 inches maximum overall width, steel overall material