worm gear
Noun
Meaning
worm gear (plural worm gears)
The gear in a worm drive.
Hypernyms
Examples
His device had the camera mounted on a vertical axis that could be rotated by a worm gear driven by turning a crank handle, and Paul put it on general sale the next year.
The banjo is usually tuned with friction tuning pegs or planetary gear tuners, rather than the worm gear machine head used on guitars.
The key on the tuning machine turns a metal worm, which drives a worm gear that winds a string.