worm gear


Cars & Driving

  • noun a device consisting of a short, 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


  • A gear which changes the direction of the axis of a rotary motion by utilizing a shaft with a threaded surface, called worm (1), and toothed wheel, called worm wheel.