Product Description

Item No. φD L L1 L2 M Tighten the strength(N.m)
SG7-6-40- 40 55 19 24 M3 3
SG7-6-55- 55 65 22 31 M4 6
SG7-6-65- 65 76 27 37 M5 8
SG7-6-82- 82 88 32 41 M6 10
SG7-6-90- 90 88 32 41 M6 12


Item No. Rated torque Maximum Torque Max Speed Inertia Moment N.m rad RRO Tilting Tolerance End-play Weight:(g)
SG7-6-40- 13N.m 26N.m 8000prm 9×10-5kg.m² 15×103N.m/rad 0.15mm 2c 1mm 231
SG7-6-55- 28N.m 56N.m 6000prm 2.9×10-4kg.m² 28×103N.m/rad 0.2mm 2c 1.5mm 485
SG7-6-65- 60N.m 120N.m 5000prm 4.6×10-4kg.m² 55×103N.m/rad 0.25mm 2c 1.5mm 787
SG7-6-82- 150N.m 300N.m 4500prm 1.1×10-3kg.m² 110×103N.m/rad 0.28mm 2c 1.5mm 1512
SG7-6-90- 200N.m 400N.m 4000prm 2×10-3kg.m² 140×103N.m/rad 0.3mm 2c 1.5mm 1800

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bellows coupling

Are There Specialized Bellows Couplings Designed for High-Speed or High-Torque Applications?

Yes, there are specialized bellows couplings designed to excel in high-speed or high-torque applications. These specialized couplings are engineered to meet the unique demands of such scenarios, providing optimal performance, reliability, and durability. Here’s how bellows couplings are tailored for high-speed and high-torque applications:

  • High-Speed Bellows Couplings: For high-speed applications, the primary consideration is reducing rotational inertia to minimize the effects of centrifugal forces. High-speed bellows couplings are crafted using lightweight materials, such as aluminum or titanium, to achieve lower inertia. The low inertia helps to minimize the risk of resonance and vibrations at elevated speeds, ensuring smooth operation. Additionally, these couplings undergo precise balancing to further enhance their suitability for high-speed applications.
  • High-Torque Bellows Couplings: High-torque applications demand couplings capable of transmitting substantial amounts of torque without failure. In such cases, bellows couplings are designed with robust materials, such as stainless steel or alloy steel, to handle the increased torque load effectively. The bellows structure is also engineered with thicker walls to improve torsional stiffness and torque transmission capabilities. Furthermore, the coupling’s design may incorporate multiple bellows to distribute the load evenly, preventing stress concentration on a single point.
  • Custom Engineering: Some high-speed and high-torque applications may require bespoke solutions. In such instances, manufacturers offer custom engineering services to tailor the bellows coupling’s dimensions, materials, and features to the specific requirements of the application. Customization ensures that the coupling can meet the stringent performance demands and environmental conditions of the particular high-speed or high-torque setup.

It is crucial to select the appropriate bellows coupling that matches the application’s exact specifications and operational parameters. Choosing the right coupling will ensure smooth operation, prevent premature wear, and optimize the efficiency and reliability of the entire system. When working with high-speed or high-torque applications, consulting with experienced coupling manufacturers or engineering experts can help in selecting the best-suited bellows coupling for the intended use.

bellows coupling

Real-World Examples of Successful Bellows Coupling Installations and Their Benefits

1. Aerospace Industry: In aircraft engines, bellows couplings are used to connect the engine shaft to various auxiliary components, such as generators and pumps. These couplings provide precise torque transmission, compensate for misalignments, and dampen vibrations. The benefits include increased reliability, reduced maintenance, and enhanced overall performance of the aircraft engine.

2. Medical Equipment: In medical devices like MRI machines, bellows couplings are employed to transmit motion between various components with high precision and minimal backlash. The bellows couplings’ ability to accommodate axial and angular misalignments is crucial in such applications, ensuring smooth and accurate operation. The benefit is improved imaging quality and reduced wear and tear on the equipment.

3. Robotics and Automation: In industrial robots, bellows couplings are used in joint assemblies to connect the motor shaft to the robot arm. The couplings’ flexibility allows the robot arm to move smoothly and accurately, enabling precise positioning and reducing mechanical stress on the components. This leads to higher robot accuracy and faster cycle times in automated manufacturing processes.

4. Semiconductor Manufacturing: In semiconductor fabrication equipment, bellows couplings play a vital role in wafer handling systems. The couplings help maintain precise alignment between the components, ensuring accurate wafer positioning and minimizing the risk of damage to sensitive semiconductor materials. The benefit is improved yield and production efficiency in the semiconductor manufacturing process.

5. Oil and Gas Industry: In oil rigs and drilling equipment, bellows couplings are used in the drive systems to transmit torque from the power source to various components like pumps and compressors. The couplings’ ability to withstand harsh environmental conditions, including high temperatures and corrosive environments, makes them suitable for oil and gas applications. The benefit is increased equipment reliability and reduced downtime in critical oil and gas operations.

6. Precision Machinery: In high-precision machines such as CNC machining centers, bellows couplings are utilized in the spindle drive systems. The couplings’ backlash-free operation and high torsional stiffness contribute to the machine’s accuracy and repeatability during machining operations. The benefit is improved surface finish, reduced part rejections, and enhanced productivity in precision manufacturing processes.

7. Renewable Energy: In wind turbine systems, bellows couplings are employed to connect the generator shaft to the wind turbine rotor. The couplings’ ability to accommodate misalignments caused by wind and load variations helps prevent excessive stress on the turbine’s components and ensures efficient power generation. The benefit is increased energy capture and longer service life for wind turbines.

Overall, bellows couplings have demonstrated their effectiveness and versatility across various industries by providing reliable and efficient motion control solutions. Their ability to handle misalignments, dampen vibrations, and transmit torque accurately makes them valuable components in a wide range of applications, ultimately leading to improved performance, reduced downtime, and enhanced productivity in diverse industrial processes.

“`bellows coupling

How do you Select the Right Bellows Coupling for Specific Motion Control Systems?

Selecting the right bellows coupling for a motion control system involves considering several key factors to ensure optimal performance and reliability. Here are the steps to help you make an informed decision:

  1. Application Requirements: Understand the specific requirements of your motion control system. Consider factors such as torque capacity, speed, angular misalignment, axial motion, and environmental conditions.
  2. Type of Bellows Coupling: Determine the type of bellows coupling that best suits your application. Choose from single bellows, double bellows, flexible beam with bellows, torsionally rigid, miniature, or high-temperature bellows coupling, depending on your needs.
  3. Torsional Stiffness: If your application requires high torsional stiffness to maintain precise motion control, consider bellows couplings with torsionally rigid designs.
  4. Misalignment Compensation: Evaluate the amount of misalignment your system may encounter and choose a bellows coupling with the appropriate misalignment compensation capabilities.
  5. Torque and Speed Ratings: Check the torque and speed ratings of the coupling to ensure they meet or exceed the requirements of your motion control system.
  6. Space Constraints: Consider the available space for the coupling. For applications with limited space, miniature or compact bellows couplings may be suitable.
  7. Environmental Conditions: If your application involves extreme temperatures or corrosive environments, opt for a high-temperature or corrosion-resistant bellows coupling material.
  8. Customization: Some applications may require customized solutions. In such cases, consult with coupling manufacturers to explore the possibility of tailored designs.
  9. Consult with Experts: When in doubt, seek advice from coupling manufacturers or engineering experts who can offer valuable insights and recommendations based on your specific application needs.

By carefully considering these factors, you can select the right bellows coupling that aligns with your motion control system’s requirements and ensures smooth and efficient power transmission. Additionally, choosing high-quality and reputable coupling suppliers will contribute to the overall success and reliability of your motion control application.

China Standard CNC Motors Use Spring Coupling High Rigid Shaft Stainless Steel Bellow Flexible Coupling  China Standard CNC Motors Use Spring Coupling High Rigid Shaft Stainless Steel Bellow Flexible Coupling
editor by CX 2024-03-12