worm gear
or worm·gear
noun
a mechanism consisting of a worm engaging with and driving a worm wheel, the two axes usually being at right angles, used where a relatively low speed and a relatively large amplification of power are desired.
Also called worm wheel.
a gear wheel driven by a worm.
Origin of worm gear
First recorded in 1875–80
Words nearby worm gear
worldwide,
worm,
worm conveyor,
worm drive,
worm fence,
worm gear,
worm grass,
worm into,
worm lizard,
worm out of,
worm snake
Example sentences from the Web for worm gear
The frame e carries the worm-wheel a and the worm-gear b, which is operated by the crank f.
Modern Machine-Shop Practice, Volumes I and II |Joshua RoseIn this case the worm-gear pinion is on the side of the machine not seen in the engraving.
Modern Machine-Shop Practice, Volumes I and II |Joshua RoseThe worm-gear is forced tightly on the taper spindle with a nut, and keyed to prevent turning.
Modern Machine-Shop Practice, Volumes I and II |Joshua RoseIn removing it from the box, pick it up by placing the hands underneath the worm-gear.
The Gunner's Examiner |Harold E. Cloke
British Dictionary definitions for worm gear
worm gear
noun
a device consisting of a threaded shaft (worm) that mates with a gearwheel (worm wheel) so that rotary motion can be transferred between two shafts at right angles to each other
Also called: worm wheel
a gearwheel driven by a threaded shaft or worm