When linking gears, power is accurately transmitted if the tooth pitch is consistent and the rotating and rotated axes are in parallel.

For axes to rotate smoothly, two structures facing each other must be leveled. The leveled structure and the axis must be at a right angle. (90 degrees)

When transmitting power between two axes using gear and pulley, you can vary the rotating speed and force by adjusting the size of each part. The image on the left displays a setup where there is a speed reduction from the rubber bushing to the pulley, and another reduction created by the pinion fixed on the pulley and the gear linked to it. Consequently, the speed is reduced but the power has increased substantially.

When two axes are at a distance, a belt can be placed on the pulleys for power transmission. However, there will be slipping between the belt and the pulley, causing power loss. In order to overcome this, chains can be used to transmit power over a long distance in an accurate manner.