Gears are found in tons of mechanical products. They do several important jobs, but most significant, they provide a gear reduction in motorized equipment. That is key because, often, a little motor spinning very fast can provide Screw Air Compressors plenty of power for a device, however, not enough torque. For example, an electric screwdriver includes a very large gear reduction since it needs lots of torque to carefully turn screws, bu­t the motor only produces a small amount of torque at a high speed. With a equipment reduction, the result speed can be reduced while the torque is increased.

Another thing gears do is certainly modify the direction of rotation. For instance, in the differential between the rear tires of your car, the power is definitely transmitted by a shaft that operates down the center of the automobile, and the differential must convert that power 90 degrees to use it to the tires.

There are a lot of intricacies in the various 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 discover in all types of mechanical gadgets.­


On any gear, the ratio depends upon the distances from the center of the gear to the point of contact. For example, in a device with two gears, if one equipment is twice the size of the other, the ratio would be 2:1.

Probably the most primitive types of gears we’re able to look at will be a steering wheel with wooden pegs sticking out of it.

The problem with this type of gear is that the length from the center of each gear to the idea of contact changes as the gears rotate. This means that the gear ratio adjustments as the apparatus turns, meaning that the output quickness also changes. If you used a equipment like this in your car, it would be impossible to keep up a constant speed — you would be accelerating and decelerating continuously.

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

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

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