一種可拆卸組件,軸頸、軸頸、樞軸或類似物可在其內或上移動。它用於承載載荷並減少滑動摩擦。它不使用滾動元件。此組件的外部構件經過改造,以提供軸桿。內部構件可以是滑動球面軸承或套筒軸承。不含:滑動球面軸承和自調心滑動軸承。
ball type style designator, 0.8770 inches minimum and 0.8830 inches maximum bore diameter, cobalt comp 6 inner member material, 3.9850 inches minimum and 4.0150 inches maximum bore center to shank end distance