實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.6000 inches minimum and 0.6200 inches maximum overall length, 63.0 min rockwell c hardness rating special features, steel comp e50100 or steel comp e52100 overall material, 66,aisi/sae e50100 or e52100 fed std single material response overall material document and classification, 0.2498 inches minimum and 0.2500 inches maximum rolling element diameter