Which type of gears are generally applied on reducers due to their large speed ratio?

Worm gears are particularly well-suited for use in speed reducers because of their ability to achieve a very large speed reduction in a compact design. The unique configuration of a worm gear system consists of a worm (which is similar to a screw) that meshes with a worm wheel (a gear), allowing for a significant reduction in RPMs while simultaneously increasing torque. This high reduction ratio is a key advantage, as it enables the design of machines that require low speed and high torque output, which is often essential in many applications.

In addition to their high speed reduction capabilities, worm gears also provide self-locking properties, meaning they can prevent back-driving, which adds to their utility in applications where maintaining a certain position is critical. This self-locking feature is not commonly found in other types of gears.

The other types of gears mentioned have their own specific advantages and are used in various applications, but they typically do not achieve the same level of speed reduction that worm gears do, making worm gears the preferred choice for reducers in many scenarios.