實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
rockwell hardness c scale 63 min 66 max special features, 0.2300 inches minimum and 0.2500 inches maximum overall length, steel comp e50100 or steel comp e51100 or steel comp e52100 overall material, 0.1560 inches minimum and 0.1562 inches maximum rolling element diameter, 66,aisi/sae e52100,e51100 oe 50100 fed std single material response overall material document and classification