Gear are omnipresent when it involves rotation and speed & motion transfer. With the advancements in science and technology gears have got new platforms of applications. They are inevitable in running of machines and vehicles. There are a number of different types of gears used in different industries depending upon their properties and usage. They can be classified under automotive gears, mining gears, wind turbines, bicycle gears, mill heads, instrumentation gears, conveyor system, marine gears etc.

Gears are used for two basic purposes; increase or decrease of rotation speed and increase or decrease of power or torque. Torque is a measure of a force to produce torsion and rotation about an axis. To increase speed and reduce torque a large drive gear is coupled to a smaller driven gear. To reduce speed and increase torque a small gear turning a larger gear is used. They are also used for enhancement for positioning systems.

Gears, as per their application in various fields can be categorized as: Gears used in Agro Industry, Automotive Gears, Conveyor Systems, Instrumentation Gears, Marine Gears, Mill heads, Mining Gears, Power Station Gears, Wind Turbine, etc.