This apparatus is designed to demonstrate the mechanism of compound gears. Through this apparatus students can inspect and calculate the changes in gear ratio, velocity ratio and torque ratio due to intermediate gears in compound gearing.
In this apparatus gear of different pitch circle diameter and number of teeth are meshed together and seated on base at same level. Pins are used to lock them and these gears are adjustable. These gears are adjustable and students can perform different experiments through changing the position of the gears, and different velocity ratio and torque ratio can be achieved.