gear wheel

Definitions of gear wheel

n a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion

cogwheel, gear, geared wheel
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bevel gear, pinion and crown wheel, pinion and ring gear
gears that mesh at an angle
escape wheel
gear that engages a rocking lever
a gear with a small number of teeth designed to mesh with a larger wheel or rack
epicyclic gear, planet gear, planet wheel, planetary gear
an outer gear that revolves about a central sun gear of an epicyclic train
rack and pinion
a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
spur gear, spur wheel
gear wheels that mesh in the same plane
sun gear
the central gear in an epicyclic train
worm gear
gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
worm wheel
gear with the thread of a worm
differential, differential gear
a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves
lantern pinion, lantern wheel
a small pinion having cylindrical bars instead of teeth, used chiefly in inexpensive clocks
Type of:
a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)

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