Which solution really suits your application?
Trapezoidal threads have a long history in mechanical power transmission and are particularly widespread in spindle drives. They are considered a robust and proven solution for many industrial applications. But is the trapezoidal thread really the best choice for your project?
In fact, there are more modern alternatives that are Efficiency, maintenance requirements and service life are superior. One of these is the Round thread Rondo® from Eichenberger. In many cases, a Round threadsuch as our Rondo® , can be a sensible alternative - depending on the application requirements.
In this article, we take a closer look at the differences between Trapezoidal thread and round threadtheir respective advantages and when it is worth considering alternatives.
Our Rondo round threaded spindle, which is the perfect alternative to the trapezoidal thread
1. what is a trapezoidal thread?
The trapezoidal thread is a symmetrical Thread form with a Flank angle of 30°which offers a good combination of Power transmission and self-locking is made possible. It is traditionally used in applications in which High axial forces occur and a simple mechanical solution is required.
Typical applications for trapezoidal threads:
- Linear drives in mechanical engineering and conveyor technology
- Adjustment mechanisms (e.g. for furniture or lifting systems)
- Vices and worm gear screw jacks
History of the trapezoidal thread:
The history of the trapezoidal thread goes back a long way. As early as the 19th century, it was used as the standard thread for Screw drives and screw presses introduced. Its trapezoidal geometry offers a Higher load capacity and self-locking than a standard metric thread, which is why it is still used in many applications today.
A trapezoidal thread usually includes a suitable Trapezoidal threaded nutwhich is available in different materials (e.g. bronze, plastic or steel) to adjust the friction properties.
A classic example of the use of trapezoidal threads is the Trapezoidal threaded spindle with trapezoidal threaded nutwhich converts a rotary movement into a linear movement. This combination is often used in lifting mechanisms or adjustment drives.
2. trapezoidal thread - advantages and disadvantages
Trapezoidal threads are particularly suitable for applications in which a High load transmission is required. However, there are some technical features that can be challenging for modern systems.
Advantages of trapezoidal threads:
✔ High load-bearing capacity for axial loads
✔ Self-locking possible with steep threads
✔ Robust and widely used
Disadvantages of trapezoidal threads:
✘ High frictional resistance → Low efficiency
✘ Heavy wear and tear → Regular maintenance required
✘ Requires lubrication to minimize wear
✘ Higher noise development due to friction
Especially in dynamic or low-maintenance systems the friction of a trapezoidal thread can lead to a higher energy consumption and faster wear lead. In such cases, it is worth taking a look at alternative thread forms such as the Round thread
The round thread differs from the trapezoidal thread due to its rounded profile
3. the better solution: Rondo round thread
Eichenberger consciously offers No trapezoidal thread - and for good reason! The Round thread differs from a trapezoidal thread by its Rounded profilewhich leads to smoother running and less abrasion.
Why is Rondo® the better choice?
- Less friction - therefore higher efficiency
- Less wear and tear - longer service life than trapezoidal threads
- Dirt resistance - Ideal for harsh environments
- Smooth and quiet operation
Typical applications for Rondo®:
🔹 Height-adjustable systems and linear actuators
🔹 Conveyor technology and mechanical engineering
🔹 Applications with a high dirt load
Especially for applications with frequent operation or unfavorable environmental conditions, Rondo® is clearly superior to the trapezoidal thread.
4. comparison: trapezoidal thread vs. round thread Rondo
| Feature | Trapezoidal thread | Round thread Rondo® |
| High load capacity | ✅ Yes | ✅ Yes |
| High efficiency | ❌ No | ✅ Yes |
| Low maintenance | ❌ No | ✅ Yes |
| Self-locking possible | ✅ Yes | ❌ No |
| Dirt resistance | ❌ No | ✅ Yes |
| Long service life | ❌ No | ✅ Yes |
| Suitable for harsh industrial use | ❌Restricted | ✅ Yes |
| Low noise | ❌ No | ✅ Yes |
Conclusion: While trapezoidal threads for applications with low movement and high load are a tried and tested solution, round threads in dynamic or dirty applications often have decisive advantages. If you are looking for a low-maintenance, durable and more efficient alternative to the classic trapezoidal thread, our Round thread Rondo® the ideal solution.
5. conclusion: Why Rondo is often the better choice
Trapezoidal threads have proven themselves over many years - but there are better alternatives for modern applications. The choice between trapezoidal threads and round threads depends heavily on the specific application. Trapezoidal threads offer high load capacity and self-locking, but require regular maintenance and are not ideal for all systems due to high friction.
Round thread, like our Rondo®can in many cases provide a more efficient and durable alternative especially when low maintenance and low friction are required.
Let us advise you
Our experts will help you to find the optimum thread technology for your application. Contact us now - we will develop the perfect solution for your requirements!
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