實心或空心結構的圓柱體,為滾子軸承提供滾動元件。
needle roller, spherical ends style designator, 0.1560 inches minimum and 0.1562 inches maximum rolling element diameter, 0.7300 inches minimum and 0.7500 inches maximum overall length, steel comp e52100 overall material, 66 fed std single material response overall material document and classification