worm gear

Worm gears are used when large equipment reductions are needed. It’s quite common for worm gears to have reductions of 20:1, and even up to 300:1 or greater.

Many worm gears have a fascinating property that no other gear arranged has: the worm can simply turn the gear, but the gear cannot turn the worm. This is because the angle on the worm is indeed planetary gearbox shallow that when the gear attempts to spin it, the friction between the equipment and the worm holds the worm set up.

This feature is useful for machines such as for example conveyor systems, in which the locking feature can become a brake for the conveyor when the motor is not turning. One other very interesting usage of worm gears is usually in the Torsen differential, which is used on some high-performance vehicles.

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