Gears are used to transfer motion and torque between machine components in mechanical devices. Depending on the design and construction of the gear pair employed, gears can change the direction of movement and/or increase the output speed or torque.

What is the purpose of a gear?

Gears serve two main purposes: increasing speed or increasing force. In order to increase one of these, compromises must me made. For example, to increase the speed of a bicycle's wheels the force applied to the pedals must be increased. Similarly, to increase the force on the wheels the pedals must be turned faster.

What is gear and its uses?

Gears are mechanisms that are used to transfer motion from one shaft to another. Different types of gears have different applications. For Example, spur gears are used to transfer motion between parallel shafts. Whereas Rack and Pinion gears are used to convert rotational motion into linear motion.