由滾輪和螺柱組成的組件,用於與凸輪產生滾動接觸,並將往復運動或振盪運動轉換為線性運動。
1.8740 inches minimum and 1.8750 inches maximum overall outside diameter, 0.4996 inches minimum and 0.5002 inches maximum bore diameter, 1.0520 inches minimum and 1.0680 inches maximum overall length, steel corrosion resisting overall material