Product Description
A beam coupling, also known as helical coupling, is a flexible coupling for transmitting torque between 2 shafts while allowing for angular misalignment, parallel offset and even axial motion, of 1 shaft relative to the other. This design utilizes a single piece of material and becomes flexible by removal of material along a spiral path resulting in a curved flexible beam of helical shape. Since it is made from a single piece of material, the Beam Style coupling does not exhibit thebacklash found in some multi-piece couplings. Another advantage of being an all machined coupling is the possibility to incorporate features into the final product while still keep the single piece integrity.
Changes to the lead of the helical beam provide changes to misalignment capabilities as well as other performance characteristics such as torque capacity and torsional stiffness. It is even possible to have multiple starts within the same helix.
The material used to manufacture the beam coupling also affects its performance and suitability for specific applications such as food, medical and aerospace. Materials are typically aluminum alloy and stainless steel, but they can also be made in acetal, maraging steel and titanium. The most common applications are attaching encoders to shafts and motion control for robotics.
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| Type | Description | Bore(mm) |
| BR | D18L25 | 4~6.35 |
| D20L25 | 4~8 | |
| D25L30 | 5~12 | |
| D32L40 | 8~16 | |
| DR | D12L19 | 3~6 |
| D16L24 | 3~6.35 | |
| D18L25 | 3~10 | |
| D25L30 | 5~14 | |
| BE | D16L23 | 3~6 |
| D18L25 | 3~6.35 | |
| D20L26 | 4~8 | |
| D25L31 | 5~12 | |
| D32L41 | 6~16 |
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Temperature and Environmental Limits for Various Beam Coupling Materials
The temperature and environmental limits of beam coupling materials depend on their specific composition and properties. Different materials have varying degrees of resistance to temperature extremes, chemicals, humidity, and other environmental factors. Here are some common beam coupling materials and their associated temperature and environmental limits:
- 1. Stainless Steel:
Stainless steel beam couplings are known for their excellent mechanical properties and resistance to corrosion. They can typically operate within a wide temperature range, from -40°C to 300°C (-40°F to 572°F). Stainless steel is also resistant to most chemicals, making it suitable for various environments, including industrial and outdoor applications.
- 2. Aluminum:
Aluminum beam couplings offer lightweight construction and moderate mechanical properties. They have a more limited temperature range compared to stainless steel, typically operating between -20°C to 120°C (-4°F to 248°F). While aluminum has good corrosion resistance in certain environments, it is not as durable as stainless steel in harsh conditions.
- 3. Brass:
Brass beam couplings have reasonable mechanical properties and corrosion resistance. They are suitable for applications with temperatures ranging from -20°C to 100°C (-4°F to 212°F). Brass is more susceptible to corrosion in certain environments, so it is essential to consider the specific application’s conditions.
- 4. Plastic/Polymer:
Beam couplings made from plastic or polymer materials offer lightweight and cost-effective solutions. However, their temperature limits are more restricted compared to metal couplings. They typically operate between -30°C to 80°C (-22°F to 176°F). These couplings may not be suitable for high-temperature or chemically aggressive environments.
- 5. Carbon Steel:
Carbon steel beam couplings are known for their strength and mechanical properties. They generally operate between -40°C to 120°C (-40°F to 248°F). Carbon steel is vulnerable to corrosion, so it may not be ideal for applications in corrosive or humid environments without proper protection.
It’s crucial to consider the temperature and environmental conditions of your specific application when selecting a beam coupling material. Choosing a material that can withstand the intended operating conditions will ensure the longevity and reliable performance of the coupling.
Additionally, keep in mind that various beam coupling manufacturers may offer specific variations of materials with different properties and limits. Always refer to the manufacturer’s datasheets and technical documentation for precise information on the temperature and environmental limits of their beam coupling products.
Where to Find Reputable Suppliers or Manufacturers of Beam Couplings
If you are looking for reputable suppliers or manufacturers of beam couplings to meet your specific needs, there are several avenues you can explore:
- Online Industrial Directories:
Utilize online industrial directories and platforms that list manufacturers and suppliers of mechanical components, including beam couplings. Websites like Thomasnet, Alibaba, and GlobalSpec allow you to search for specific products and filter results based on your requirements.
- Trade Shows and Exhibitions:
Attend trade shows and exhibitions related to motion control, automation, and mechanical components. These events often feature a wide range of suppliers and manufacturers showcasing their products, including beam couplings. Engaging with exhibitors in person can provide valuable insights and networking opportunities.
- Industry Associations and Forums:
Join industry associations and online forums related to motion control and mechanical engineering. These communities often share information about reputable suppliers and manufacturers, and you can seek recommendations from experienced professionals.
- Company Websites and Catalogs:
Visit the websites of established companies specializing in motion control components. Reputable manufacturers often provide detailed information about their products, technical specifications, and application examples. Many companies offer downloadable catalogs with comprehensive product offerings.
- Customer Reviews and Testimonials:
Look for customer reviews and testimonials about specific suppliers or manufacturers. Positive feedback and recommendations from other customers can help you gauge the reliability and quality of the products and services.
- Consulting with Experts:
Seek advice from experts or consultants in the motion control industry. They can provide valuable insights into the best beam coupling options for your specific needs and may have knowledge of reputable suppliers.
- Requesting Quotes and Samples:
Contact potential suppliers or manufacturers directly to request quotes and product samples. This allows you to compare offerings, pricing, and product quality before making a decision.
When evaluating potential suppliers or manufacturers, consider factors such as product quality, range of available sizes and materials, lead times, customer support, and after-sales services. Choose a reputable and reliable partner who can meet your specific beam coupling requirements and provide long-term support for your motion control needs.
Advantages of Using Beam Couplings in Precision Positioning Systems
Beam couplings offer several advantages when used in precision positioning systems. These advantages make them a popular choice for applications that demand accurate motion control and positioning. Here are the key benefits of using beam couplings in precision positioning systems:
- 1. Misalignment Compensation:
Beam couplings are designed to provide flexible connections between shafts, allowing them to compensate for various types of misalignment, including angular, axial, and parallel misalignment. In precision positioning systems, where accurate alignment is critical for maintaining positioning accuracy, beam couplings help prevent unnecessary stress on the components caused by misalignment, reducing wear and ensuring consistent performance.
- 2. Torsional Rigidity:
Beam couplings offer high torsional rigidity, meaning they effectively transmit torque without significant torsional deformation. This rigidity is essential for maintaining precise motion control and minimizing backlash in precision positioning systems. It ensures that the desired position is accurately maintained without undue twisting or torsional deflection.
- 3. Low Inertia:
Beam couplings have a compact and lightweight design, resulting in low rotational inertia. Low inertia is crucial in precision positioning systems, as it allows for rapid and accurate changes in direction and speed. The low inertia of beam couplings helps improve the system’s response time and overall dynamic performance.
- 4. Zero Backlash:
Beam couplings can provide backlash-free performance when correctly installed and utilized within their specified torque and speed ratings. This characteristic is particularly valuable in precision positioning systems, where any play or backlash can result in position errors and reduced accuracy.
- 5. Vibration Dampening:
Beam couplings exhibit some degree of vibration dampening due to their flexible design. This feature is beneficial in precision positioning systems, where damping vibrations can reduce mechanical resonances, improve stability, and minimize settling times, resulting in smoother and more precise motion.
- 6. Long Service Life:
High-quality beam couplings made from durable materials have excellent resistance to wear and fatigue. With proper installation and maintenance, beam couplings can have a long service life, providing reliable and consistent performance in precision positioning systems.
- 7. Easy Installation:
Beam couplings are relatively easy to install and do not require elaborate alignment procedures. Their flexible design allows for some misalignment tolerance during installation, making the setup process more straightforward and efficient.
- 8. Cost-Effective:
Beam couplings offer an excellent balance of performance and cost-effectiveness. Compared to some other types of precision couplings, beam couplings often provide a more budget-friendly solution without compromising on essential performance characteristics.
In summary, beam couplings offer significant advantages in precision positioning systems, including misalignment compensation, torsional rigidity, low inertia, zero backlash, vibration dampening, long service life, easy installation, and cost-effectiveness. These advantages contribute to the overall accuracy, stability, and reliability of precision motion control applications, making beam couplings a popular choice for demanding positioning tasks.
editor by CX 2024-04-04