實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
66 fed std single material response overall material document and classification, agwh criticality code justification, steel comp e52100 overall material, 0.1650 inches minimum and 0.1850 inches maximum overall length, 0.078000 inches minimum and 0.078025 inches maximum rolling element diameter