As any well-versed worm gear manufacturer will tell you, worm gears are those ones with the circular, toothed wheels that have a spiral thread sitting on top that both engages and drives the wheel. Folks that don’t work with gears don’t realize that this basic interaction between two pieces is one of the world’s “six simple machines.” Typically, they’re comprised of steel and brass.
The way that worm gears work, generally, is when either an engine or electric motor is used to apply some rotational power to the worm, which then rotates again the wheel. Worm gears get chosen over standard gears for several reasons. One of them is that it’s impossible to