Product Description

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Item No. φD L L1 W M Tighten the strength(N.m)
SG7-11-30- 30 50 18.5 13 M3(4) 1.2
SG7-11-40- 40 66 25 16 M4(6) 2.7
SG7-11-55- 55 78 30 18 M5(4) 6
SG7-11-65- 65 90 35 20 M5(6) 6
SG7-11-80- 80 114 45 24 M6(8) 10
SG7-11-95- 95 126 50 26 M8(4) 35
SG7-11-105- 105 140 56 28 M8(4) 35

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Item No. Rated torque Maximum Torque Max Speed Inertia Moment N.m rad Tilting Tolerance End-play Weight:(g)
SG7-11-30- 7.4N.m 14.8N.m 20000prm 8.7×10-4kg.m² 510N.m/rad 1.0c +0.6mm 50
SG7-11-40- 9.5N.m 19N.m 15000prm 1.12×10-3kg.m² 550N.m/rad 1.0c +0.8mm 120
SG7-11-55- 34N.m 68N.m 13000prm 4.5×10-3kg.m² 1510N.m/rad 1.0c +0.8mm 280
SG7-11-65- 95N.m 190N.m 10500prm 9.1×10-3kg.m² 2800N.m/rad 1.0c +0.8mm 450
SG7-11-80- 135N.m 270N.m 8600prm 1.9×10-2kg.m² 3600N.m/rad 1.0c +1.0mm 960
SG7-11-95- 230N.m 460N.m 7500prm 2.2×10-2kg.m² 4700N.m/rad 1.0c +1.0mm 2310
SG7-11-105- 380N.m 760N.m 6000prm 3.3×10-2kg.m² 5800N.m/rad 1.0c +1.0mm 3090

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clamp coupling

Materials used in Manufacturing Servo Couplings and their Impact on Performance

Servo couplings are essential components in motion control systems, designed to connect shafts and transmit torque while compensating for misalignment. The materials used in manufacturing servo couplings play a crucial role in determining their performance characteristics. Some commonly used materials and their impact on performance are:

  1. Aluminum:

    Aluminum servo couplings are lightweight and offer low inertia, making them suitable for applications with high rotational speeds. They have good corrosion resistance and electrical conductivity but may have limited torque and misalignment capabilities compared to other materials.

  2. Stainless Steel:

    Stainless steel servo couplings are known for their high strength, durability, and excellent resistance to corrosion. They are commonly used in harsh environments where exposure to moisture or chemicals is a concern. Stainless steel couplings can handle higher torques and misalignments compared to aluminum but are generally heavier.

  3. Plastic/Polymer:

    Plastic or polymer servo couplings are lightweight and offer good flexibility, making them suitable for applications where vibration dampening is required. They have excellent electrical insulation properties and are often used in precision systems. However, they may have limitations in terms of torque and temperature resistance.

  4. Steel:

    Steel servo couplings are known for their high torque capacity and robustness. They are commonly used in heavy-duty applications, especially where high torsional stiffness is required. Steel couplings may be more substantial compared to other materials, which can affect the overall weight and inertia of the system.

  5. Hybrid Materials:

    Some servo couplings combine different materials to leverage their advantages and mitigate their limitations. For example, a hybrid coupling might have a stainless steel hub combined with a flexible polymer element to provide a balance between torque capacity and misalignment compensation.

When selecting a servo coupling material, it is essential to consider the specific requirements of the application, including torque, misalignment, speed, environmental conditions, and budget constraints. Each material has its unique characteristics, and the right choice will ensure optimal performance, longevity, and efficiency of the motion control system.

clamp coupling

How Servo Couplings Help in Reducing Vibrations and Resonance during Operation

Servo couplings play a crucial role in reducing vibrations and resonance during the operation of motion control systems. Here’s how they achieve this:

  • Damping Properties: Some servo couplings, especially those made from materials with high damping properties, can absorb and dissipate vibrations. These couplings act as shock absorbers, reducing the impact of sudden changes in motion and minimizing vibrations in the system.
  • Flexibility: Flexible servo couplings have the ability to compensate for misalignments between the motor and the driven load. This flexibility helps distribute the load evenly, preventing excessive forces that may lead to resonance. By accommodating misalignments, flexible couplings also reduce stress on the motor and bearings, minimizing vibrations.
  • Vibration Isolation: Some servo couplings, such as elastomeric couplings, have inherent vibration isolation properties. The elastomeric material acts as a cushion, isolating the motor and driven load from external vibrations and disturbances that could affect system performance.
  • Reduced Backlash: Zero-backlash couplings eliminate play between coupling components, preventing sudden changes in motion direction. This reduction in backlash reduces the chances of vibrations caused by rapid acceleration or deceleration and ensures smooth and stable motion.
  • Dynamic Balancing: Certain servo couplings are precisely balanced during the manufacturing process. This dynamic balancing helps counteract any rotational imbalance in the system, reducing vibrations caused by uneven distribution of mass.
  • Torsional Stiffness: Servo couplings with appropriate torsional stiffness prevent excessive twisting or deflection during operation. This stiffness maintains the stability of the system and minimizes vibrations.

By effectively reducing vibrations and resonance, servo couplings contribute to the overall performance and reliability of motion control systems. The selection of the right coupling type, taking into consideration the specific requirements of the application, is essential to ensure optimal vibration damping and smooth operation.

clamp coupling

How to Choose the Right Servo Coupling for Specific Motion Control Applications

Choosing the right servo coupling is crucial for achieving optimal performance and reliability in motion control applications. Here are the key steps to help you select the most suitable servo coupling for your specific application:

  1. Identify Application Requirements: Start by understanding the specific requirements of your motion control application. Consider factors such as torque and speed requirements, misalignment compensation needed, environmental conditions, and the level of precision and repeatability required.
  2. Consider Torque Capacity: Determine the maximum torque that the servo coupling needs to transmit. Choose a coupling with a torque capacity that exceeds the peak torque in your application to ensure safety and prevent premature failure.
  3. Evaluate Misalignment Compensation: Assess the type and amount of misalignment that may occur between the servo motor and the driven load. Different coupling types offer varying degrees of misalignment compensation, such as angular, axial, and parallel misalignment. Select a coupling that can accommodate the expected misalignments to prevent excessive loads on the motor and bearings.
  4. Examine Speed and Precision: Consider the speed at which the application will operate and the required level of precision. High-speed applications may require couplings with low inertia and high torsional stiffness to minimize vibration and ensure accurate motion control.
  5. Review Backlash and Torsional Stiffness: Backlash can impact motion accuracy, especially in reversing applications. Look for couplings with low backlash to maintain precise bidirectional control. Additionally, evaluate the torsional stiffness of the coupling to ensure efficient power transmission and response.
  6. Check Environmental Compatibility: Consider the operating environment, including temperature, humidity, and exposure to chemicals or contaminants. Choose a servo coupling made from materials that can withstand the specific environmental conditions without compromising performance or lifespan.
  7. Assess Installation and Maintenance: Evaluate the ease of installation and any maintenance requirements of the coupling. Some couplings may require periodic lubrication or replacement of elastomeric elements. Opt for a coupling that is easy to install and maintain to minimize downtime and servicing costs.
  8. Seek Expert Advice: If you are unsure about the best servo coupling for your application, consult with experts or engineers experienced in motion control systems. They can provide valuable insights and recommend suitable couplings based on your specific needs.

By carefully considering these factors and following the steps outlined above, you can choose the right servo coupling that matches your motion control application’s requirements. A well-chosen coupling will ensure smooth and accurate motion, improve system performance, and extend the lifespan of your servo motor and driven load.

China manufacturer Sg7-11 Flexible Jaw Type Coupling Servo Motor Shaft Coupling  China manufacturer Sg7-11 Flexible Jaw Type Coupling Servo Motor Shaft Coupling
editor by CX 2024-01-12