DC motors and DC gear motors are both widely used in smaller appliances, toys, automobiles, cycles and low voltage applications as - 1 ) their 12v dc motors wholesalers https://www.lbdcmotor.com/product/dc-motor-12v/ speed can be varied, easily and 2) their torque can be increased, again, simply, by using gears / gear boxes.

The main difference between the normal DC motor and a geared DC motor is

In case geared DC motor according to the teeth of the gear the torque of the motor shaft can be varied where as in Normal DC motor to change the torque the field control is required.

By varying the torque (controlling gear teeth)we can easily hydraulic pump motors Manufacturers https://www.lbdcmotor.com/product/dc-motor-12v/hydraulic-pump-motor-hy61029.html vary the speed of the gear DC motor which is impossible for normal DC motor with out conventional methods of speed control…

A gear motor is nothing more than a regular motor with a gearbox of some type attached to the output shaft. AC or DC doesn’t matter.

In simple dc motor the rotational speed will remain same for constant speed you made it.But in the gear motor there is a set of gear box for increasing or decreasing the speed of dc motor.