實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.2496 inches minimum and 0.2497 inches maximum rolling element diameter, finished smooth within 10 micro in. special features, steel comp 5140 overall material, 0.5960 inches minimum and 0.6040 inches maximum overall length, needle roller, conical ends style designator