實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.3745 inches minimum and 0.3750 inches maximum bore diameter, steel outer race material, steel comp 440c band material, 0.811 inches minimum and 0.813 inches maximum inner ring width, 0.9055 inches minimum and 0.9060 inches maximum overall outside diameter