一種軸承,其軸或旋轉部件圍繞通常位於保持架內的硬化滾子旋轉。它必須包含內圈或外圈,或兩者兼有。對於不帶滾道的軸承,請參閱保持架和滾子,軸承。
afbma std tolerances for journal bearings standard tolerance designation, 1.2500 inches nominal bore diameter, 2.0000 inches nominal overall outside diameter, 2.0000 inches nominal overall width