實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
b-52f,g,h acft end item identification, steel comp e51100 overall material, cylindrical roller, spherical ends style designator, 0.0310 inches minimum and 0.0312 inches maximum rolling element diameter, 0.2300 inches minimum and 0.2500 inches maximum overall length