Can helical gears transmit power between non - parallel shafts?

Mar 30, 2026

As a supplier of helical gears, I often encounter various questions from customers regarding the functionality and application scenarios of our products. One of the most frequently asked questions is whether helical gears can transmit power between non - parallel shafts. In this blog, I will delve into this topic in detail, exploring the principles, advantages, and limitations of using helical gears for power transmission between non - parallel shafts.

Understanding Helical Gears

Before we discuss their ability to transmit power between non - parallel shafts, let's first understand what helical gears are. Helical gears are a type of cylindrical gears with teeth that are cut at an angle to the gear axis. This helical shape of the teeth allows for a more gradual engagement compared to spur gears, which have straight teeth. As a result, helical gears offer several advantages, such as smoother operation, reduced noise, and the ability to handle higher loads. You can find more information about helical gears on our website Helical Gear.

Power Transmission between Non - Parallel Shafts

Helical gears can indeed transmit power between non - parallel shafts. There are two main types of non - parallel shaft arrangements where helical gears can be used: intersecting shafts and non - intersecting, non - parallel shafts.

Intersecting Shafts

When dealing with intersecting shafts, bevel gears are often the first choice. However, helical gears can also be used in some cases. Spiral bevel gears, which are a special type of bevel gears, have teeth that are curved and angled, similar to helical gears. They can transmit power between shafts that intersect at an angle, typically 90 degrees. The helical shape of the teeth in spiral bevel gears provides smoother and quieter operation compared to straight bevel gears, making them suitable for high - speed applications.

Non - Intersecting, Non - Parallel Shafts

For non - intersecting, non - parallel shafts, crossed helical gears are commonly used. Crossed helical gears are a pair of helical gears where the axes of the two gears are non - parallel and non - intersecting. The teeth of the two gears mesh at a point, and the contact between the teeth is a line contact. This type of gear arrangement allows for power transmission between shafts that are oriented at an angle to each other.

Internal Gear

Advantages of Using Helical Gears for Non - Parallel Shaft Power Transmission

Smooth Operation: As mentioned earlier, the helical shape of the teeth allows for a more gradual engagement, resulting in smoother power transmission. This is especially important in applications where vibration and noise need to be minimized, such as in precision machinery and automotive transmissions.
High Load Capacity: Helical gears can handle higher loads compared to spur gears due to the larger contact area between the teeth. This makes them suitable for heavy - duty applications where a large amount of power needs to be transmitted.
Versatility: Helical gears can be used in a wide range of non - parallel shaft arrangements, providing flexibility in design and application. Whether it's intersecting shafts or non - intersecting, non - parallel shafts, helical gears can be customized to meet the specific requirements of the application.

Limitations of Using Helical Gears for Non - Parallel Shaft Power Transmission

Axial Thrust: One of the main limitations of using helical gears for power transmission is the generation of axial thrust. The helical shape of the teeth causes a force to be exerted along the axis of the gear, which can lead to additional stress on the bearings and other components. To counteract this axial thrust, special bearing arrangements or thrust washers may be required.
Efficiency: Crossed helical gears, in particular, have relatively low efficiency compared to other types of gears. This is due to the sliding contact between the teeth, which results in higher friction and energy losses. In applications where efficiency is a critical factor, other gear types may be more suitable.

Applications of Helical Gears in Non - Parallel Shaft Power Transmission

Helical gears are widely used in various industries for power transmission between non - parallel shafts. Some common applications include:

Automotive Industry: In automotive transmissions, helical gears are used to transmit power between the engine and the wheels. They are also used in differential gears to allow the wheels to rotate at different speeds while turning.
Machine Tools: Helical gears are used in machine tools, such as milling machines and lathes, to transmit power between the motor and the cutting tools. Their smooth operation and high load capacity make them suitable for these high - precision applications.
Aerospace Industry: In the aerospace industry, helical gears are used in aircraft engines and landing gear systems. Their ability to handle high loads and operate smoothly at high speeds makes them essential components in these critical applications.

Our Helical Gear Products

As a helical gear supplier, we offer a wide range of helical gears that are suitable for power transmission between non - parallel shafts. Our products are manufactured using high - quality materials and advanced manufacturing processes to ensure superior performance and reliability. You can learn more about our helical gear factory and the products we offer on our website Helical Gear.

In addition to helical gears, we also supply internal gears, which are another type of gears that can be used in various applications. You can find more information about our internal gears on our website Internal Gear.

Conclusion

In conclusion, helical gears can transmit power between non - parallel shafts, offering several advantages such as smooth operation, high load capacity, and versatility. However, they also have some limitations, such as axial thrust and lower efficiency in some cases. When considering using helical gears for non - parallel shaft power transmission, it is important to carefully evaluate the specific requirements of the application and choose the appropriate gear type and design.

If you are interested in our helical gear products or have any questions regarding power transmission between non - parallel shafts, please feel free to contact us. We are always ready to provide you with professional advice and high - quality products to meet your needs.

References

Dudley, D. W. (1962). Gear Handbook. McGraw - Hill.
Townsend, D. P. (1992). Dudley's Gear Handbook. Marcel Dekker.
Buckingham, E. (1949). Analytical Mechanics of Gears. McGraw - Hill.