External gear motors operate by:

External gear motors operate effectively through the mechanism of meshing gear teeth and manipulating fluid dynamics between the gears. The primary principle involves two gears that are in constant contact, allowing them to transmit torque and rotational motion efficiently.

When the gears mesh, one gear drives the other, which converts input power into mechanical output. This interaction creates space between the gear teeth, allowing fluid to be drawn in and pushed out of the system, which is crucial for maintaining the motor's efficiency and performance.

In essence, the operation of external gear motors hinges on both the mechanical engagement of the gear teeth and the fluid movements generated during this process, thus making both aspects integral to how they function.