What’s the Difference Between Worm Gears and Helical Gears?

industrial gearbox repairGears provide the ability to parts to move properly and allow machines to function as needed. As one of the most important parts to motors and machines, it’s important to know which gear is right for the machine you’re using or working on, especially when it comes to industrial gearbox repairs. Two of the most common types of gears in today’s machines are worm gears and helical gears. Let’s take a look at a few key differences between the two.

Worm Gears

Worm gears are generally used in large gear reductions because of the way the gear is designed. A worm gear consists of axes that cross in space, allowing the gear to transmit power at 90° as well as in places high reductions are required. The way the gear is set up allows for the worm to turn the gear, rather than having the gear turn the worm. Due to the shallow angle of the gear, the gear is firmly held in place. Because the worm is interlocked with the gear, the user is able to accurately control the speed of the gear. The design of a worm gear makes it perfect for machines and motors such as conveyor systems, gates, and lifts that may require a brake. There are also different types of worm gears, allowing users to choose the proper gear during onsite machining services.

Helical Gears

Compared to worm gears, helical gears operate much smoother and quieter. This is because the teeth on the gear are actually cut at an angle to the face of the fear. So when the teeth begin to connect, they connect slowly since they’re angled. The design of a helical gear makes it perfect for transmissions that need a lot of thrust. Depending on the angle of the teeth, the gear can support different thrust loads. Because of the complex design and stages within a helical gearbox, helical gears are generally more expensive than worm gears. But overall, helical gears can be used to effectively ensure a motor is running as smoothly as possible.

Worm gears and helical gears are very different in design and use, which is something important to keep in mind when conducting industrial gearbox repair. Knowing the key differences between these two gears should help you choose the right gear for the job.