Gears are used in tons of mechanical gadgets. They do a number of important jobs, but most significant, they provide a gear decrease in motorized equipment. That is key because, frequently, a small motor spinning extremely fast can provide plenty of power for a gadget, but not enough torque. For instance, an electric screwdriver has a very large gear reduction since it needs plenty of torque to turn screws, bu­t the motor only produces a small quantity of torque at a higher speed. With a gear reduction, the output speed could be reduced while the torque is increased.

Another thing gears do is definitely change the direction of rotation. For example, in the differential between the rear wheels of your car, the power is usually transmitted by a shaft that operates down the guts of the automobile, and the differential has to switch that power 90 degrees to use it to the wheels.

There are a lot of intricacies in the Motorbase different types of gears. In this post, we’ll learn exactly how the tooth on gears function, and we’ll talk about the various type­s of gears you find in all sorts of mechanical gadgets.­


On any equipment, the ratio is determined by the distances from the center of the gear to the idea of contact. For instance, in a gadget with two gears, if one equipment is twice the diameter of the additional, the ratio will be 2:1.

One of the most primitive types of gears we’re able to look at would be a steering wheel with wooden pegs protruding of it.

The problem with this type of gear is that the length from the center of each gear to the point of contact changes as the gears rotate. This means that the gear ratio changes as the gear turns, meaning that the output rate also changes. If you used a gear such as this in your car, it could be impossible to maintain a constant speed — you would be accelerating and decelerating continuously.

Many modern gears use a particular tooth profile named an involute. This account has the very important house of maintaining a continuous speed ratio between your two gears. Just like the peg wheel above, the contact point moves; but the shape of the involute gear tooth compensates for this movement. Find this section for details.

Now let’s take a look at some of the various types of gears.