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Spur Gears
Spur gears are simple and common types of gears that have straight teeth and parallel shafts. They are used to transmit rotary motion and torque between two shafts that are not angled or offset. Spur gears have some advantages, such as high efficiency, no axial thrust, and easy manufacturing. However, they also have some disadvantages, such as noise, interference, and limited speed ratio. Spur gears can be made of different materials, such as metal, plastic, rubber, or wood, and can have different tooth profiles, such as involute or cycloidal. Spur gears can also be classified into external or internal gears, depending on whether the teeth are on the outside or inside of the cylinder.
