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 overall material, 0.1230 inches minimum and 0.1260 inches maximum overall width, 1.7520 inches minimum and 1.7620 inches maximum bore diameter, flat race surface style designator, 2.4700 inches minimum and 2.4900 inches maximum outside diameter