Product Description


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


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

clamp coupling

Accommodating Varying Torque and Speed Requirements with Servo Couplings

Servo couplings are versatile components designed to accommodate varying torque and speed requirements in different applications. Their ability to transmit torque while compensating for misalignment makes them suitable for a wide range of motion control systems. Here’s how servo couplings can accommodate varying torque and speed requirements:

  • Torque Capacity:

    Servo couplings come in various designs and materials, each with its unique torque capacity. By selecting the appropriate coupling type and material, you can match the coupling’s torque capacity to the requirements of the application. For higher torque applications, steel or stainless-steel couplings are preferred, while aluminum or plastic couplings may suffice for lower torque applications.

  • Misalignment Compensation:

    In motion control systems, shaft misalignment can occur due to various factors. Servo couplings can compensate for angular, parallel, and axial misalignments, ensuring smooth operation even when the shafts are not perfectly aligned. This feature helps prevent excessive stress on the coupling and the connected components, making them suitable for applications with varying misalignment conditions.

  • Dynamic Response:

    High-speed motion control systems often require a coupling with excellent dynamic response characteristics. Flexible couplings, such as bellows or elastomeric couplings, can handle rapid changes in speed and direction, providing the necessary flexibility for dynamic applications.

  • Damping and Vibration:

    Some applications may experience vibrations or shocks during operation. Servo couplings made of materials like elastomers or plastics can act as vibration dampeners, reducing the impact of shocks and vibrations on the system.

  • Customization:

    In certain cases, off-the-shelf servo couplings may not fully meet the specific torque and speed requirements of a particular application. In such situations, manufacturers may offer customized servo couplings tailored to the application’s needs, providing a solution that precisely matches the system’s requirements.

Overall, servo couplings are designed to be adaptable and flexible, making them suitable for a wide variety of torque and speed requirements in different motion control applications. Proper selection and installation of the right type of servo coupling can significantly contribute to the overall efficiency, performance, and longevity of the motion control system.

clamp coupling

Effect of Misalignment on the Performance of Servo Couplings and How to Address It

Misalignment is a critical factor that can significantly impact the performance of servo couplings. Here’s how it affects the coupling and the measures to address it:

  • Reduced Torque Transmission: Misalignment causes angular, axial, or parallel offsets between the motor and the driven load. As a result, the coupling may not transmit the full torque efficiently, leading to power loss and reduced system performance.
  • Increased Wear and Fatigue: Misalignment subjects the servo coupling to additional stress, leading to accelerated wear and fatigue. Over time, this can cause premature failure of the coupling and other components in the system.
  • Increased Vibration and Noise: Misalignment results in uneven load distribution and can lead to increased vibrations and noise during operation. Excessive vibrations can affect the overall stability and accuracy of the motion control system.
  • Overheating: Misalignment can induce friction between the coupling and its mating components, leading to increased heat generation. This can result in overheating and potentially damage the coupling or nearby components.
  • Loss of Positional Accuracy: In precision motion control applications, misalignment can lead to a loss of positional accuracy and repeatability. The driven load may not reach the desired position precisely, affecting the overall performance of the system.
  • Addressing Misalignment: Proper alignment is crucial to maintaining the performance and longevity of the servo coupling. Here are the steps to address misalignment:
  1. Use Precision Couplings: Select servo couplings designed to accommodate misalignment while maintaining high precision and torque transmission capabilities. Flexible couplings, such as bellows or beam couplings, are often used to address misalignment.
  2. Check Alignment Regularly: Perform periodic checks to verify the alignment between the motor and the driven load. Use alignment tools and techniques to correct any misalignment within acceptable tolerances.
  3. Use Coupling Guards: Coupling guards can protect the servo coupling from external forces or impacts that could cause misalignment. They help maintain the coupling’s proper orientation and prevent damage.
  4. Follow Installation Guidelines: Adhere to the manufacturer’s installation guidelines and recommendations for mounting and aligning the servo coupling. Improper installation can lead to misalignment issues.
  5. Maintenance and Lubrication: Regularly maintain and lubricate the servo coupling as per the manufacturer’s instructions. Proper lubrication can help reduce friction and wear, mitigating the effects of misalignment.
  6. Dynamic Balancing: If the application involves high speeds, consider using servo couplings that are dynamically balanced to minimize the effects of rotational imbalance and potential misalignment.

By addressing misalignment effectively, the performance, efficiency, and service life of servo couplings can be optimized, contributing to the overall success of motion control systems.

clamp coupling

Advantages of Using Zero-Backlash Servo Couplings in Precision Systems

Zero-backlash servo couplings offer significant benefits in precision motion control systems where accuracy, repeatability, and reliability are essential. Here are the advantages of using zero-backlash servo couplings:

  • Precise Motion Control: Zero-backlash couplings have no play or clearance between the coupling components. This lack of backlash ensures that motion is accurately transmitted from the servo motor to the driven load without any lost motion. As a result, precision systems can achieve precise positioning and smooth motion profiles.
  • Elimination of Positioning Errors: Backlash in couplings can lead to positioning errors, especially in applications where motion direction changes frequently. Zero-backlash couplings prevent any shift or lag in motion, resulting in accurate and repeatable positioning of the driven load.
  • High Repeatability: With zero-backlash, the coupling maintains consistent positioning during bidirectional movements. This feature enhances repeatability, which is crucial in tasks that require the system to follow the same path repeatedly with minimal deviation.
  • Improved System Stability: Backlash in couplings can cause vibration and instability in precision systems. Zero-backlash couplings dampen vibrations and ensure a more stable motion, which is particularly valuable in high-speed and high-precision applications.
  • Long-Term Reliability: Zero-backlash couplings reduce wear and stress on the servo motor and driven load’s bearings and components. This reduction in wear increases the lifespan of the entire system and reduces the need for frequent maintenance and replacement.
  • Responsive Dynamic Performance: Zero-backlash couplings provide instantaneous response to changes in motion direction and speed. This responsiveness is critical in applications that require rapid acceleration and deceleration, enabling the system to handle dynamic loads with precision and efficiency.
  • Higher Torque Transmission: Zero-backlash couplings can handle higher torque loads compared to some flexible couplings with backlash. This capability allows the system to transmit greater forces without compromising motion accuracy.
  • Enhanced Efficiency: By minimizing lost motion and ensuring precise power transmission, zero-backlash couplings contribute to overall system efficiency. They reduce energy losses and optimize the utilization of the servo motor’s output power.
  • Compatibility with High-Precision Components: In precision systems that incorporate high-precision components like encoders and linear scales, zero-backlash couplings are essential to maintain the accuracy of these components’ measurements and feedback.

In summary, zero-backlash servo couplings play a critical role in precision motion control systems by providing accurate, repeatable, and stable motion. Their ability to eliminate backlash and minimize positioning errors enhances overall system performance, efficiency, and reliability, making them an ideal choice for demanding applications that require the utmost precision.

China high quality Curved Jaw-Type Flexible Servo Motor Use 45# Steel Connector Claw Joint Coupling  China high quality Curved Jaw-Type Flexible Servo Motor Use 45# Steel Connector Claw Joint Coupling
editor by CX 2023-11-27