實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
0.2500 inches nominal rolling element diameter, 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, 1.7500 inches nominal overall length, needle roller, spherical ends style designator