China high quality Flexible Coupling CNC Shaft Customized Servo Motor Jaw Coupling motor coupling

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

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motor coupling

How to Select the Right Motor Coupling for Specific Torque and Speed Requirements?

Selecting the right motor coupling for specific torque and speed requirements is crucial to ensure optimal performance and reliability in a power transmission system. Here are the steps to guide you through the selection process:

1. Identify Torque and Speed Requirements:

Determine the torque and speed requirements of your application. Torque is the rotational force needed to perform the intended task, while speed refers to the rotational speed at which the coupling will operate.

2. Consider Operating Conditions:

Take into account the environmental conditions and operating parameters of your application. Factors such as temperature, humidity, and potential shock loads may influence the coupling’s performance.

3. Calculate Torque and Speed Ratios:

Calculate the torque and speed ratios between the motor and driven equipment. This will help you understand the required torque capacity and misalignment capabilities of the coupling.

4. Choose the Coupling Type:

Select a coupling type that aligns with your torque and speed requirements. For higher torque applications, consider gear couplings, while elastomeric couplings are suitable for lower torque applications with misalignment needs.

5. Check Torque and Speed Ratings:

Consult the manufacturer’s specifications to ensure the selected coupling can handle the calculated torque and speed requirements. Pay attention to both the continuous and peak torque ratings.

6. Misalignment Compensation:

If your application requires misalignment compensation, opt for flexible couplings that can accommodate angular and/or parallel misalignment.

7. Consider Critical Speed:

For high-speed applications, check the coupling’s critical speed rating. Operating near or beyond the critical speed can lead to resonance and coupling failure.

8. Verify Service Life:

Check the expected service life of the coupling under your application’s conditions. A coupling with a longer service life can reduce maintenance needs and downtime.

9. Budget and Cost:

Consider the budget and overall cost of the coupling, including installation and maintenance expenses. Balance the initial cost with the coupling’s expected performance and durability.

10. Seek Expert Advice:

If you are unsure about the best coupling choice for your specific requirements, consult with coupling manufacturers or industry experts who can provide valuable insights and recommendations.

By following these steps and conducting thorough research, you can confidently select the right motor coupling that matches your torque and speed requirements, ensuring efficient power transmission and prolonged equipment lifespan.

“`motor coupling

Temperature and Speed Limits for Different Motor Coupling Types

Motor couplings come in various types, and each type has its temperature and speed limits. These limits are essential considerations to ensure the coupling operates safely and efficiently. Here are the general temperature and speed limits for different motor coupling types:

1. Elastomeric Couplings:

Elastomeric couplings, such as jaw couplings and spider couplings, are commonly used in a wide range of applications. They typically have temperature limits of approximately -40°C to 100°C (-40°F to 212°F). The speed limits for elastomeric couplings typically range from 3,000 to 6,000 RPM, depending on the specific coupling design and size.

2. Gear Couplings:

Gear couplings are known for their high torque capacity and durability. The temperature limits for gear couplings are usually between -50°C to 150°C (-58°F to 302°F). The speed limits for gear couplings can be as high as 5,000 to 10,000 RPM or more, depending on the size and design.

3. Disc Couplings:

Disc couplings provide high torsional stiffness and are often used in precision applications. The temperature limits for disc couplings are typically around -40°C to 200°C (-40°F to 392°F). The speed limits for disc couplings can range from 5,000 to 20,000 RPM or more.

4. Grid Couplings:

Grid couplings are known for their shock absorption capabilities. The temperature limits for grid couplings are usually between -30°C to 100°C (-22°F to 212°F). The speed limits for grid couplings typically range from 3,600 to 5,000 RPM.

5. Oldham Couplings:

Oldham couplings are often used to transmit motion between shafts with significant misalignment. The temperature limits for Oldham couplings are generally around -30°C to 80°C (-22°F to 176°F). The speed limits for Oldham couplings are usually up to 3,000 to 5,000 RPM.

6. Diaphragm Couplings:

Diaphragm couplings are suitable for applications requiring high precision and torque transmission. The temperature limits for diaphragm couplings are typically between -50°C to 300°C (-58°F to 572°F). The speed limits for diaphragm couplings can be as high as 10,000 to 30,000 RPM.

It is essential to check the manufacturer’s specifications and recommendations for the specific coupling model to ensure the coupling operates within its intended temperature and speed limits. Operating the coupling beyond these limits may lead to premature wear, reduced performance, or even catastrophic failure. Properly selecting a coupling that matches the application’s temperature and speed requirements is critical for reliable and safe operation.

“`motor coupling

Can a Damaged Motor Coupling Lead to Motor or Equipment Failure?

Yes, a damaged motor coupling can lead to motor or equipment failure if not addressed promptly. Motor couplings play a critical role in connecting the motor to the driven equipment and transmitting torque between them. When a coupling is damaged, several potential issues can arise:

  • Reduced Torque Transmission: Cracks, wear, or deformation in the coupling can result in reduced torque transmission from the motor to the driven equipment. This may lead to inefficient operation and underperformance of the machinery.
  • Mechanical Vibrations: Damaged couplings can introduce vibrations into the system, leading to increased wear and fatigue on connected components, such as bearings and shafts. Excessive vibrations can cause premature failure of these parts.
  • Misalignment and Stress: If the coupling loses its ability to compensate for misalignment, it can subject the motor and driven equipment to increased stress and loading. This can result in premature wear and failure of bearings, shafts, and other components.
  • Overload on the Motor: In certain coupling designs, damage may result in a loss of overload protection. Without the safety mechanism, the motor may experience excessive loads, leading to overheating and possible motor failure.
  • Increased Downtime: A damaged coupling can cause unexpected breakdowns and unplanned downtime for repairs, affecting productivity and overall operational efficiency.
  • Safety Risks: In extreme cases, a severely damaged coupling may disintegrate during operation, posing safety risks to personnel and surrounding equipment.

To avoid motor or equipment failure due to a damaged coupling, regular maintenance and inspection are crucial. Visual inspections, vibration analysis, and monitoring of coupling performance can help identify signs of damage early on. If any issues are detected, it is essential to replace or repair the damaged coupling promptly to prevent further damage and ensure the reliable operation of the machinery.

Proper selection of high-quality couplings, appropriate for the specific application and operating conditions, can also reduce the likelihood of coupling failure and its potential impact on the motor and equipment.

China high quality Flexible Coupling CNC Shaft Customized Servo Motor Jaw Coupling   motor couplingChina high quality Flexible Coupling CNC Shaft Customized Servo Motor Jaw Coupling   motor coupling
editor by CX 2024-04-25