實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
harden and temper to rc 63 min special features, 66,aisi/sae e50100 or e52100 fed std single material response overall material document and classification, 0.6360 inches minimum and 0.6560 inches maximum overall length, steel comp e50100 or steel comp e52100 overall material, 0.1560 inches minimum and 0.1562 inches maximum rolling element diameter