Qhov no spur iav ncej siv hauv kev tsim kho tshuab.Iav shafts nyob rau hauv kev sib kis machinery feem ntau yog ua los ntawm 45 steel nyob rau hauv high-zoo carbon steel, 40Cr, 20CrMnTi nyob rau hauv alloy steel, thiab lwm yam.Qhov no spur iav ncej yog tsim los ntawm 20MnCr5 tsawg carbon alloy hlau, carburizing rau hauv 58-62HRC.