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The most common mechanical component is the gear. They can be found in almost all mechanical devices with rotating parts. These mechanical transmission elements have teeth that transmit power and motion between machine parts.
Precision spur gears are the most popular type of gear. They are also called straight tooth gears. They have straight teeth that are inserted parallel to the shaft of the circular gear. These gears use parallel shaft arrangements to transmit power and motion in pairs. Depending on the application, they can be mated with another spur gear, an internal gear (e.g. in planetary gear systems) or a rack (e.g. in a precision rack and pinion pair).
There are two types: external gears and internal gears. The teeth of the external gear are formed by cutting the outer surface of a cylinder. Both outer gears are connected and can be rotated in reverse. The teeth of the inner gear are made from a rounded outer surface. The inner spur gear houses the smaller outer gear and the other gears are arranged in the same direction. Because the shafts can be placed closer together, the inner gear assembly takes up less space.
Mechanical spur gears are used in a wide range of mechanical applications, including clocks, power screwdrivers, pumps, and watering systems. They are also used as material handling equipment and power plant machinery. More than two spur gears can be included in the gearbox to achieve higher gear reduction rates if the application requires.
These gears are best suited for applications requiring speed reduction and higher torque, such as crushing equipment. Spur gears are louder than other types of gears and therefore are not commonly used in automobiles. However, they are often used in aircraft engines. Spur gears generate noise when the teeth of the spur gear come in contact with another tooth.
This article outlines spur gears. For more information on related products, please ask us!