Abstract：The vibration will be very strong when the flexible shaft is rotating, and the balancing in one speed will break the balancing in another speed. The balancing of fl exible shaft is different from the balancing of rigid shaft. The vibration of the flexible shaft can not be eliminated and the balancing purpose also can not be reached by adopting the rigid delivering method. Many methods which are keeping ahead in international are concluded by many theory researches and practical experiences, and good effects are obtained.
2010, 
