Gears are used in many mechanical devices. They perform several important tasks, but one of the most critical is to provide gear reduction for motorized equipment. The most commonly used gears are spur gears. It is used to transmit power between two counter-rotating parallel shafts. They have straight teeth, and once properly mounted on parallel shafts, they are able to mesh with other gears.

　　Spur gears have their own set of advantages. However, they do get quite noisy when used at high speeds. Additionally, their design puts a lot of stress on the gear teeth when they are used at high speeds. Spur gears are also known as slow gears because these gears are intended for use in equipment that does not operate at high speeds.

　　Few devices use only internal spur gears. Internal spur gears are gears with straight teeth cut into the inner rim, parallel to the axis of rotation. Also, a set of spur gears are used to increase or decrease the power of a given object. Spur gears can be used to this effect in the following equipment:

　　Washing Machines − Due to their rotational motion, spur gears are used in washing machines. They help increase or decrease torque, depending on the function the washer is performing.

　　Conveyors - Spur gears can be used to assist in the function of conveyors and conveyor belts. High-quality spur gears are the most reliable for changing torque in these electronic devices.

　　Power Stations - In power stations, spur gears are used to convert some form of energy, such as wind or hydroelectric power, into electricity.

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