In order to choose the most suitableHard tooth surface gear reducer, It is necessary to understand the detailed technical characteristics of the machine driven by the geared motor, and a use factor fB must be determined. 
Use factor fB.
    Hard tooth surface gear reducerThe selection should first determine the following technical parameters: working hours per day; number of starts and stops per hour; operating cycle per hour; reliability requirements; working machine torque T working machine; output speed n output; load type; ambient temperature; on-site heat dissipation condition;
    Hard tooth surface gear reducerIt is usually designed based on constant torque, infrequent starting and stopping, and normal temperature.The allowable output torque T is determined by the following formula:
    T=Tout X fB use coefficient 
    T out———— Geared Motor Output Torque fB———— Geared Motor Use Coefficient
    Transmission ratio ii=nin/nout motor power P(kw) P=Tout* nout/ 9550* η output torque Tout (Nm) Tout=9550* P*η/nout where: nin ——Input speed η——The transmission efficiency of the reducer

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