ローラー ベアリングの転動体となる、中実または中空構造の円筒形本体。
66,aisi/dae e50100,e51100 or e52100 fed std single material response overall material document and classification, steel comp e50100 or steel comp e51100 or steel comp e52100 overall material, 1.0000 inches nominal overall length, needle roller, spherical ends style designator, 0.1250 inches nominal rolling element diameter