實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
66,aisi/dae e50100,e51100 or e52100 fed std single material response overall material document and classification, 0.1250 inches nominal rolling element diameter, needle roller, spherical ends style designator, 1.0000 inches nominal overall length, steel comp e50100 or steel comp e51100 or steel comp e52100 overall material