A worm gear is a specific kind of gear setup consisting of a worm and a worm wheel. The worm resembles a screw-shaped shaft, whereas the worm wheel is a gear, its teeth cut at an angle to correspond with the worm's screw thread. As the worm is turned, it meshes with the worm wheel's teeth, driving the worm wheel to rotate in the contrary direction. Worm gears are highly effective in power transmission and are frequently used in scenarios demanding a substantial amount of torque.