實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.2690 inches minimum and 0.2710 inches maximum overall length, 0.2178 inches minimum and 0.2179 inches maximum rolling element diameter, hardness rating rockwell c scale 58 min special features, aisi 52100 assn std single material response overall material document and classification, steel comp e52100 overall material