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/sae e50100,e51100 or e52100 fed std single material response overall material document and classification, 0.0310 inches minimum and 0.0312 inches maximum rolling element diameter, needle roller, spherical ends style designator, steel comp e50100 or steel comp e51100 or steel comp e52100 overall material, 0.1700 inches minimum and 0.1900 inches maximum overall length