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

Contributing to Accuracy and Repeatability in Motion Systems

Servo couplings play a crucial role in improving the accuracy and repeatability of motion systems by addressing several key factors that influence performance:

  • Flexibility and Misalignment Compensation: Servo couplings are designed to be flexible, allowing them to accommodate small misalignments between the motor and the driven load. This flexibility helps prevent mechanical binding and reduces stress on the motor and bearings, ensuring smoother and more accurate motion.
  • Backlash Minimization: Backlash is the play or clearance between the mating teeth or elements of a coupling. It can introduce errors in motion systems, leading to inaccuracies and reduced repeatability. Servo couplings, especially zero-backlash types, are engineered to minimize or eliminate backlash, providing precise and immediate response to changes in direction and velocity.
  • Inertia Reduction: Inertia refers to the resistance of an object to changes in its state of motion. Servo couplings with low mass and compact designs contribute to reducing the overall inertia in the system. Lower inertia allows for faster acceleration and deceleration, improving the system’s responsiveness and accuracy.
  • High Torque Transmission: Servo couplings are capable of transmitting high torque efficiently, ensuring that the motion system can handle the required loads without slippage or power loss. This high torque capacity is vital for maintaining accuracy in high-power applications.
  • Vibration Damping: Vibrations can negatively impact the accuracy and repeatability of motion systems. Servo couplings with damping properties can absorb and dampen vibrations, preventing resonance and oscillations that could affect precision.
  • Consistent Performance: Servo couplings are manufactured to strict tolerances, ensuring uniformity and consistency in their performance. This uniformity contributes to reliable and repeatable motion control, critical in applications requiring precise positioning and motion.

By addressing these factors, servo couplings enable motion systems to achieve higher levels of accuracy and repeatability, making them suitable for applications such as CNC machining, robotics, semiconductor manufacturing, medical devices, and more. The improved precision and reliability provided by servo couplings lead to higher product quality, increased productivity, and reduced downtime in various industrial processes.

clamp coupling

Considerations for Selecting Servo Couplings in High-Speed Applications

High-speed applications present unique challenges that require careful consideration when selecting servo couplings. Here are specific factors to keep in mind:

  • Torsional Stiffness: In high-speed applications, torsional stiffness is crucial to ensure rapid response and accuracy. A coupling with sufficient torsional stiffness reduces torsional deflection and maintains precise motion control even at high speeds.
  • Dynamic Balance: High-speed operation can magnify any imbalances in the servo system. Choosing a servo coupling with dynamic balance helps minimize vibration and prevents excessive wear on the motor and bearings.
  • Material Selection: The material of the servo coupling should be carefully chosen to withstand the high rotational speeds and avoid resonance issues. Consider materials with high strength, low inertia, and excellent fatigue resistance to ensure reliability in high-speed applications.
  • Backlash: High-speed systems require quick changes in motion direction. Selecting a zero-backlash coupling reduces the chances of sudden impacts and vibrations due to backlash, ensuring smooth and accurate motion.
  • Inertia: The inertia of the servo coupling should be minimized to reduce the system’s overall inertia and allow for rapid acceleration and deceleration without sacrificing performance.
  • Temperature Resistance: High-speed operation can generate heat, so the chosen coupling should have good temperature resistance to prevent premature failure or deformation.
  • Bearing Loads: Consider the loads exerted on the motor and driven load bearings at high speeds. The coupling should be capable of handling these loads without causing excessive wear on the bearings.
  • Installation and Alignment: Proper installation and alignment of the servo coupling are critical in high-speed applications. Ensure precise alignment to avoid introducing additional stresses and misalignments that can compromise system performance.
  • Service Life and Maintenance: Evaluate the expected service life of the servo coupling under high-speed conditions and consider the maintenance requirements to ensure long-term reliability.

By considering these specific factors, engineers can select the most suitable servo coupling for high-speed applications, optimizing performance, accuracy, and efficiency while minimizing wear and vibration issues.

clamp coupling

What is a Servo Coupling, and Its Role in Servo Motor Systems

A servo coupling is a specialized type of coupling used in servo motor systems to connect the servo motor shaft to the driven load. Servo motor systems are widely used in various industries for precise motion control applications, where accuracy, speed, and torque control are crucial. The servo coupling plays a vital role in ensuring the efficient transfer of motion and torque from the servo motor to the driven load while compensating for misalignments between the motor and load shafts.

The main functions and role of a servo coupling in a servo motor system are as follows:

  • Motion Transmission: The primary function of a servo coupling is to transmit motion from the shaft of the servo motor to the load. It connects the motor shaft to the driven load, such as a ball screw, gearbox, or another mechanical component, enabling the motor to drive and control the motion of the load precisely.
  • Torque Transmission: In addition to motion, the servo coupling also transfers torque from the motor to the load. As the servo motor generates rotational force (torque), the coupling efficiently transmits this torque to the driven load, allowing it to perform its intended motion with the required force.
  • Misalignment Compensation: Perfect alignment between the servo motor shaft and the load shaft is challenging to achieve in real-world applications. Any misalignment can cause detrimental effects, including increased wear, reduced performance, and premature failure. The servo coupling acts as a flexible element that can compensate for various types of misalignments, such as angular, parallel, and axial misalignments. This flexibility helps to maintain smooth and efficient power transmission even when the motor and load are not perfectly aligned.
  • Damping of Vibrations: Servo motor systems often operate at high speeds and with rapid changes in direction. These dynamic movements can generate vibrations that may adversely affect the performance and lifespan of the system. A well-designed servo coupling can dampen these vibrations, providing a more stable and controlled motion to the load, reducing the risk of damage or inaccuracies.
  • Backlash Minimization: Backlash refers to the play or gap between the teeth or components of the coupling when the direction of motion is reversed. Excessive backlash can result in lost motion and reduced precision. High-quality servo couplings are engineered to minimize backlash, ensuring accurate bidirectional motion control in the servo motor system.

Overall, a properly selected and installed servo coupling enhances the performance, efficiency, and reliability of servo motor systems. It protects sensitive components, such as bearings and motors, from excessive loads and vibrations, leading to extended equipment life and improved motion control capabilities.

China Best Sales CNC Shaft Jaw Coupling Customized for Servo Motor Curved Flexible Coupling  China Best Sales CNC Shaft Jaw Coupling Customized for Servo Motor Curved Flexible Coupling
editor by CX 2024-04-02