# What’s the Use Coefficient of Gear Motor?

2020-06-02

The use coefficient of the gear motor is also known as the gear motor service factor or safety factor. It is so important that it is directly related to whether the gear motor can operate safely and smoothly. Therefore, the proper gear motor selection should be conducted according to the service condition.

What is the service factor of motor? The gear motor load factor is a vital parameter when calculating the gear motor service factor, which is equal to the load time divided by the total running time. When selecting the type of gear motor, it is necessary to make sure that the use coefficient of gear motor is greater than “1”(generally > 1, namely the capacity of gear motor > motor capacity) according to your service condition (such as daily running time, number of starts times per hour, and the ambient temperature) to ensure that there is a surplus of rated mechanical energy and thermal energy of gear motor.

The formula for calculating the use coefficient of gear motor:

Use coefficient =Rated output power/Motor power (to get the use coefficient of the gear motor type with continuous loads)

Calculating train of gears: Reduction ratio = Number of driven gear teeth ÷ Number of driving gear teeth (When a gear train has multiple stages, the reduction ratio for the overall gearing system is the product of the individual stages.)

Motor power = Torque ÷ 9550 × motor power input speed ÷ speed ratio ÷ use coefficient;

As for the gear motor, the use coefficient is a key parameter, whose quality directly determines whether the gear motor can operate normally and effectively in the future so that we should pay more attention to the choice.