Wannan spur gear shaft da ake amfani da shi a cikin injin gini.Gear shafts a watsa inji yawanci sanya daga 45 karfe a high quality-carbon karfe, 40Cr, 20CrMnTi a gami karfe, da dai sauransu Gabaɗaya, shi ya sadu da ƙarfi bukatun na kayan, da lalacewa juriya ne mai kyau.Wannan spur gear shaft aka yi ta 20MnCr5 low carbon gami karfe, carburizing cikin 58-62HRC.