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。
0.7450 inches minimum and 0.7500 inches maximum overall width, 3.8530 inches minimum and 3.8580 inches maximum bore diameter, 0.7450 inches minimum and 0.7500 inches maximum outer ring width, 4.9980 inches minimum and 4.9990 inches maximum overall outside diameter, 0.7450 inches minimum and 0.7500 inches maximum inner ring width