Shaft breakage due to too little output of reducer

If the drive motor is not broken, but the output shaft of the reducer is broken, there are several possible causes besides poor concentricity of assembly at the output of the reducer. First, the wrong selection results in insufficient output of the gearbox. Some users mistakenly assume that as long as the rated output torque of the selected reducer meets the requirements of the work, it is not.

First, the rated output torque of the equipped drive motor is multiplied by the speed ratio and the value obtained is in principle smaller than the corresponding rated output torque provided by the product sample of the reducer.

The overload capability of the drive motor and the higher working torque required in practical application should also be considered. In theory, the greater working torque required by the user must be less than twice the rated output torque of the reducer. This rule must be strictly observed in some applications, not only to protect the internal gears and shafts of the reducer, but also to prevent the output shaft of the reducer from being twisted. If these factors are not taken into account, once the equipment is installed incorrectly and the output shaft of the reducer is jammed by the load, the overload capacity of the drive motor will continue to increase its output until the output shaft of the reducer is subjected to more force than its larger output torque, the shaft will break. If there is a certain margin of the rated output torque of the reducer, then breaking the grooved cake on the output shaft will be avoided.

Second, during acceleration and deceleration, the reducer output shaft will eventually break if the instantaneous impact torque exceeds twice its rated output torque and this acceleration and deceleration occurs too frequently. If this occurs, careful calculation should be made to consider increasing the torque margin.