Function:
It is used to transmit rotational motion between two axes.
Types:
Gears are classified in cylindrical, conical, hyperboloid and worm gears. They are identify by the form of their teeth as well.
Geometry:
![geometria engranajes](https://grupos.unican.es/ingmec/lavimm/wp-content/uploads/2015/06/geometria-engranajes.jpg)
Gears’s mechanism:
- Reducers/multipliers: They are used to decrease/increase driven shaft’s revolution per minute to driver shaft’s.
- Transmission gears: They permit to change driven shaft’s speed stepwise. It is possible connecting diferent sprocket chains.
- Setting mechanim: It allows you to set the required gear ratio and obtain the demand speed of driven shaft.
Transmission ratio:
![relaciones transmision](https://grupos.unican.es/ingmec/lavimm/wp-content/uploads/2015/06/relaciones-transmision.jpg)