What is the difference between the gear motor N30 and N20?

The gear motor N30 has a larger torque than the N20, so its purpose is different.
The housing length is also different, and the N30 is longer.
When using the reduction motor, we must also pay attention to the voltage, speed, torque, life, noise, etc., and pay attention to the quality.
For different speeds, we can choose N30, N20, and N10 reduction motors according to performance parameters.
Each model has a different housing length, torque, power, and application range. Each motor is basically customized, and the shaft length is different.