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, 0.1800 inches minimum and 0.2000 inches maximum outer member width, 4.4100 inches minimum and 4.4300 inches maximum overall length, 4.1300 inches minimum and 4.1400 inches maximum bore center to shank end distance, externally threaded shank style