Worm Gears & Worm Gear Sets
Worm
gears are used when large gear reductions are needed. It is common for
worm gears to have reductions of 20:1, and even up to 300:1 or greater.
Many worm gears have an interesting property that no other gear set
has: the worm can easily turn the gear, but the gear cannot turn the
worm. This is because the angle on the worm is so shallow that when the
gear tries to spin it, the friction between the gear and the worm holds
the worm in place.
This feature is useful for machines such as conveyor systems, in which
the locking feature can act as a brake for the conveyor when the motor
is not turning.
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Worm Gear
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