Product Description

Densen customized Motor Single Disc Flexible Shaft Coupling

Product Name Motor Single Disc Flexible Shaft Coupling
DN mm 12~160mm
Rated Torque 25~25000 N·m
Allowable speed 15300~1500 N·m
Material 35CrMo/ZG270/45# steel/Aluminum alloy
Application Widely used in metallurgy, mining, engineering and other fields.

Product show

Company Information




Typical case of diaphragm coupling applied to variable frequency speed control equipment

JMB type coupling is applied to HangZhou Oilfield Thermal Power Plant

According to the requirements of HangZhou Electric Power Corporation, HangZhou Oilfield Thermal Power Plant should dynamically adjust the power generation according to the load of the power grid and market demand, and carry out the transformation of the frequency converter and the suction fan. The motor was originally a 1600KW, 730RPM non-frequency variable speed motor matched by HangZhou Motor Factory. The speed control mode after changing the frequency is manual control. Press the button speed to increase 10RPM or drop 10RPM. The coupling is still the original elastic decoupling coupling, and the elastic de-coupling coupling after frequency conversion is frequently damaged, which directly affects the normal power generation.

It is found through analysis that in the process of frequency conversion speed regulation, the pin of the coupling can not bear the inertia of the speed regulation process (the diameter of the fan impeller is 3.3 meters) and is cut off, which has great damage to the motor and the fan.

Later, they switched to the JMB460 double-diaphragm wheel-type coupling of our factory (patent number: ZL.99246247.9). After 1 hour of destructive experiment and more than 1 year of operation test, the equipment is running very well, and there is no Replace the diaphragm. 12 units have been rebuilt and the operation is in good condition.


Other Application Case


Spare parts


Packaging & Shipping


Contact us


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

How to Identify Signs of Wear or Failure in a Motor Coupling?

Regular inspection of motor couplings is essential to detect signs of wear or potential failure. Identifying these signs early can prevent unexpected breakdowns and ensure the safety and efficiency of the power transmission system. Here are some indicators to look for:

1. Visible Damage:

Check for any visible damage to the coupling components, such as cracks, chips, or deformations. These may indicate stress or excessive wear.

2. Abnormal Noise:

Listen for any unusual noises during operation, such as rattling, clicking, or grinding sounds, which could suggest misalignment or component damage.

3. Vibration:

Excessive vibration during operation may indicate coupling misalignment or component wear.

4. Temperature Changes:

Notice any significant increases in the temperature of the coupling during operation, as it may suggest excessive friction or improper lubrication.

5. Misalignment:

Check for any misalignment between the motor and driven equipment shafts, as misalignment can lead to accelerated coupling wear.

6. Excessive Backlash:

If you observe excessive play or free movement in the coupling when changing rotational direction, it may indicate increased backlash and potential coupling wear.

7. Lubrication Issues:

Inspect the coupling for signs of insufficient or contaminated lubrication, as improper lubrication can lead to increased friction and wear.

8. Increased Downtime:

If you notice more frequent maintenance or unplanned downtime, it may be a sign of coupling wear or potential failure.

9. Shaft Movement:

Observe any axial or radial movement in the motor or driven equipment shafts, which could indicate coupling wear or misalignment.

10. Age and Usage:

Consider the age of the coupling and the total operating hours. Older couplings or those subjected to heavy usage may be more susceptible to wear and require closer inspection.

If you identify any of these signs, it’s essential to address the issue promptly. Depending on the severity of the wear or failure, the appropriate action may involve adjusting the alignment, replacing worn components, or replacing the entire coupling. Regular maintenance and inspection schedules can help catch potential problems early and extend the life of the motor coupling, contributing to a more reliable and efficient power transmission system.

“`motor coupling

Types of Motor Couplings and Their Applications in Different Industries

Motor couplings come in various types, each designed to meet specific requirements and applications in different industries. Here are some common types of motor couplings and their typical uses:

1. Rigid Couplings:

Rigid couplings provide a solid and inflexible connection between the motor shaft and the driven equipment. They are ideal for applications where precise alignment and torque transmission are critical. Rigid couplings are commonly used in machine tools, robotics, and high-precision industrial equipment.

2. Flexible Couplings:

Flexible couplings are designed to accommodate misalignment between the motor and driven equipment shafts. They can handle angular, parallel, and axial misalignment, reducing stress on bearings and increasing the system’s flexibility. Flexible couplings find applications in pumps, compressors, conveyors, and other machinery where misalignment may occur due to vibration or thermal expansion.

3. Gear Couplings:

Gear couplings use toothed gears to transmit torque between the motor and the driven equipment. They provide high torque capacity and are suitable for heavy-duty applications, such as steel rolling mills, cranes, and marine propulsion systems.

4. Disc Couplings:

Disc couplings use thin metal discs to transmit torque. They offer high torsional stiffness, allowing precise motion control in applications like servo systems, CNC machines, and robotics.

5. Jaw Couplings:

Jaw couplings use elastomeric elements to dampen vibrations and accommodate misalignment. They are commonly used in small electric motors and general-purpose machinery.

6. Bellows Couplings:

Bellows couplings have a flexible accordion-like structure that compensates for misalignment while maintaining torsional rigidity. They are used in vacuum systems, optical equipment, and other high-precision applications.

7. Grid Couplings:

Grid couplings use a flexible grid element to transmit torque and dampen vibrations. They are suitable for applications in pumps, compressors, and conveyor systems where shock loads and misalignment are common.

8. Magnetic Couplings:

Magnetic couplings use magnetic fields to transmit torque between the motor and driven equipment. They are commonly used in applications requiring hermetic sealing, such as pumps and mixers handling hazardous or corrosive fluids.

Each type of motor coupling offers unique advantages and is chosen based on the specific needs of the industry and the application. Proper selection and installation of the right coupling type enhance efficiency, reliability, and safety in motor-driven systems across various industries.

China Hot selling CZPT Customized Motor Single Disc Flexible Shaft Coupling   motor couplingChina Hot selling CZPT Customized Motor Single Disc Flexible Shaft Coupling   motor coupling
editor by CX 2023-09-14