實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
1.2480 inches minimum and 1.2520 inches maximum rolling element diameter, cylindrical roller, flat ends style designator, qq-s-763 fed spec single material response roller material document and classification, steel comp 440c roller material, 0.6950 inches minimum and 0.7050 inches maximum overall length