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。
1.0020 inches minimum and 1.0120 inches maximum bore diameter, 1.5320 inches minimum and 1.5520 inches maximum outside diameter, matt and spcl criticality code justification, 0.0300 inches minimum and 0.0320 inches maximum overall width, steel overall material