The Power Industry is a highly mechanized industry for power generation as well as for power transmission. The Power Industry uses a variety of gears as supportive components at several aspects of power generation and transmission. There are various types of power generation such as gas turbine electric power generation, thermal power electricity plants, hydropower electricity plant among others. The many varieties of gear equipment used in different types of power plants. Bevel gears are used to change the axis of rotational motion, while parallel shaft gears help to operate machines at high speed. Planetary gears are used in high-speed turbo systems, helical gears help in minimizing noise and power losses. Multi-shaft internal gears are used in expansion of turbines, electric motors etc. Spur gears help in transporting power from idler gears to wheels. Some other gears used in the Power Industry are spiral bevel, worm gear etc.