Gear Types And Characteristics
A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source. Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine.
Introduction to Gears – Gear Types And Characteristics!
Gears are normally classified in three ways. The classification of gears is mainly as per the configuration, as per the pattern of motion, and as per the axes of transmission.
As per the configuration, gears are either external gears or internal gears. An external gear is one with the teeth formed on the outer surface of a cylinder or cone. Conversely, an internal gear is one with the teeth formed on the inner surface of a cylinder or cone.
As per the pattern of motion gears can be transmitting rotational movement to rotational movement or translating rotational movement to straight movement or vice versa (rack and pinion). Such gears can be straight toothed or helical toothed.
As per the axes of transmission gears can be of several types such as spur gear, bevel gear, and worm gear etc.
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