E-mail:  wicta@gearmotordc.com
1. choose the right gear motor from our series
The best way is: you send us your dimension and performance requirements, and we will evaluate it and give the best recommendation. In this situation, please let us know the following basic performance: voltage, rated speed and rated torque. Of course more detail much better.
High Speed requirements: when your speed is >1000rpm, please choose DC Motor series.
Low speed and not high torque, you may turn to our Gear Motor diameter under 37mm Series.
Low Speed and High Torque, please turn to DC Gear Motor Diameter above 37mm series.or Flat gearbox motor Series, The Planetary Gear Motor is designed with higher torque. small size, for some precise automation products, flat shaped gearmotor series is designed to satisfy the high torque low rpm and bigger dimension application.

2.Torque Conversion Chart 

UNIT 0F TORQUE gf.cm kgf.cm N.m mN.m N.cm lb.in oz.in
gf.cm 1 0.001 0.000098 0.098 0.0098 0.000868 0.01389
kgf.cm 1000 1 0 98 9.8 0.868 13.889
N.m 10200 10.2 1 1000 100 8.85 141.64
mN.m 10.2 0.0102 0.001 1 0.1 0.00885 0.142
N.cm 102 0.102 0.01 10 1 0.0885 1.42
lb.in 1152 1.152 0.113 113 11.3 1 16
oz.in 72 0.072 0.00706 7.06 0.706 0.0625 1

3. When use DC Motor, please pay attention to the following:
Motor Shaft Machine: Do not machine the motor shaft without get inform us, this may cause the damage of gear and gears cooperation.
Motor Installation: The standard fasten direction is to set the shaft in horizontal direction, to change the direction may cause the oil leaking, and also cause the load direction changing, this may influence the motor performance and lifetime.
Run the shaft(DC Gear Motor): Do not turn the shaft by hand when adjust the install direction, this will turn the gearbox to be increaser not a reducer, and also this will turn the Dc Motor to be Generator.
Terminal Welding: When welding the terminal with wires, please use the Iron temperature at 350~400°C within 2-3 seconds. Too high temperature or too long time will cause damage to motor terminal and connection parts, especially when it is metal Brush motor.
Stall or overload: The Winding and Iron will create heat during motor running, and this heating will gradually increase, under normal load, the temperature can be balance between creating and releasing, it will not burn the motor winding. But if often use the Stall or Overload, the temperature can not be balance as normal, it will gradually burn the Resistant Layer over the Winding, then cause the winding to be burnt down.
Low Speed running: For Carbon Brush Motor, during the working of motor, the carbon Brush will be gradually wore off, and the carbon Powder will be rub off the brush. So if the motor is in lower speed, the carbon power will accumulate in the commutator slots, when the quantity increases, it will cause the motor to be short circuit. To avoid this situation, we use different kinds of technics and materials according to different motor and speed, so it is very important that users let us know their working voltage of the motor.
Noise Solution: When you have strict requirements on noise and Electromagnetic Interference, please inform us in advance, we have ways to handle these issues.
Inertia and Solution: When the power is cut off, the motor will continue to run for a few seconds, we call this Motor Phenomenon. All the DC Motors have such Phenomenon. If you want solve this issue, you just need to connect the motor “+” to “-“, then this phenomenon will disappear. This is to use Motor-Generator Features(Inverse Current), however this action will cause a high momentary current, usually perform this action will shorten the Motor lifetime.
DC Motor Life time: lifetime varies according to different use conditions and load, so different working condition will cause different lifetime for the same motor, please let us know your exact using condition, we will design the motor according to it.
The following factors will affect the motor lifetime, so if you use motor in such condition, please inform us, we can discuss over it and try to find a solution together.
A.use motor under bigger load than rated one
B.frequently start and stop
C.CW and CCW running transfer fast and frequently
D.use sudden big load, not constant load
E. long-time continuous running
F. force the shaft to anti the running direction
G. frequently use stall condition
H. use lower or higher voltage than rated one