Gears are used to reduce the shaft output speed for applications that require a lower speed. This means that the gear motor’s operating pressure typically is very low, ranging between 100 and 150 bar. In addition, some of the more modern gear motors operate at, up to, 250 bar continuous pressure. However, the downside is that this motor can be rather noisy.
To sum up, gear motors are generally lightweight and small units with relatively high pressures. In addition they are known for their low cost, variety of speeds, broad temperature range, simple design and large viscosity range.