The bevel gears helps to make the very compact epicyclic system, which can be used in high speed reduction with few gears. The main applications of epicyclic bevel gear train are Humpage’s Speed Reduction Gear and Differential Gear of an Automobile.
The working of the above gears are mentioned in the below ppt:
Hydraulics is a machine which works with the use of fluid power. It is the liquid version of pneumatic. Hydraulic liquid is a high pressure liquid that is transmitted to hydraulic cylinders and motors. The main purpose for using hydraulic machinery is to create a high amount of power through small tubes.
An introduction of hydraulics is described briefly in the below ppt.