A worm gear is a type of gear mechanism that consists of a worm, which is a screw-like component, and a worm wheel, which resembles a gear. This setup allows for the transmission of power between non-parallel shafts, typically at a right angle. Worm gears are known for their ability to provide high torque and reduce speed, making them useful in various applications like elevators and conveyor systems. One of the key features of worm gears is their ability to prevent back-driving, meaning the output cannot turn the input. This characteristic makes them ideal for applications requiring a locking mechanism. Common uses include automotive steering systems and industrial machinery, where precise control and stability are essential.