A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. The product types of gears includes Spur Gears, Helical Gears, Gear Rack, Bevel Gear and Worm Gear, and the revenue proportion of Spur Gears in 2016 was about 31.8%.Gears can be used for Vehicles, General Industry and Special Equipment.