China OEM DIN BS Universal Wide Range Flexible Ductile Iron Straight Coupling

Product Description

Universal Wide Range Flexible Ductile Iron Straight Coupling


1 Body BSEN1563 EN-GJS(QT)-450-10/Carbon Steel
2 Gland BSEN1563 EN-GJS(QT)-450-10
3 Seals EPDM/NBR
4 Fasteners Stainless Steel/Carbon Steel with Dacromet Coating/GAL Carbon Steel
5 Coating Fusion Bonded Epoxy

(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (Nm)
50 59-72 188 148 95 72 76 153 4-M12*180 55-65 4.1
65 72-85 188 148 95 85 89 173 4-M12*180 55-65 4.1
80 88-103 188 146 95 103 107 185 4-M12*180 55-65 4.1
100 109-128 188 146 95 127 132 208 4-M12*180 55-65 4.6
125 138-153 198 153 95 158 162 256 4-M12*190 55-65 8.3
150 159-182 198 153 95 182 186 280 4-M12*190 55-65 8.5
175 189-212 233 187 130 211 216 329 4-M12*225 55-65 9.0 
200 218-235 233 187 130 234 239 333 4-M12*225 55-65 10.6
225 242-262 233 185 130 261 265 379 6-M12*225 55-65 14.5
250 272-289 233 186 130 288 295 391 6-M12*225 55-65 15.4
300 315-349 233 187 130 349 352 464 6-M12*225 55-65 20.0 
322-339 233 187 130 338 345 444 6-M12*225 55-65 23.1
338-360 233 187 130 359 366 460 6-M12*225 55-65 23.1
350 351-391 250 187 130 390 395 502 10-M12*225 55-65 26.8
400 400-442 250 187 130 441 446 558 10-M12*225 55-65 31.9
450 455-493 250 187 130 492 497 608 10-M12*225 55-65 36.6
500 500-599 250 187 130 598 594 662 10-M12*225 55-65 40.0 
600 600-692 250 187 130 691 697 768 10-M12*225 55-65 42.0 
700 708-780 250 187 130 779 785 910 10-M12*225 55-65 45.0 


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flexible coupling

How does a flexible coupling help in power transmission efficiency?

Flexible couplings play a crucial role in improving power transmission efficiency in various mechanical systems. Here are the ways in which flexible couplings contribute to enhanced efficiency:

  • Misalignment Compensation: In real-world applications, it is challenging to achieve perfect alignment between shafts due to manufacturing tolerances, thermal expansion, or external forces. Flexible couplings can accommodate both angular and parallel misalignments between the driving and driven shafts. By doing so, they ensure that the torque is transmitted smoothly and efficiently despite misalignment, reducing power losses due to misaligned shafts.
  • Vibration Damping: Vibrations in mechanical systems can lead to energy losses and premature wear of components. Flexible couplings with vibration-damping properties can absorb and dampen vibrations generated during operation. By reducing the transmission of vibrations, these couplings help to maintain power transmission efficiency and extend the lifespan of connected equipment.
  • Shock Load Absorption: During start-up or sudden changes in operating conditions, equipment may experience shock loads. Flexible couplings are designed to absorb and cushion these shock loads, preventing sudden impacts on the system. By minimizing the shock load's effect, flexible couplings contribute to smoother power transmission and reduced stress on components.
  • Torsional Stiffness: While flexible couplings allow for misalignment compensation, they still exhibit a certain degree of torsional stiffness. This stiffness ensures that the majority of the torque is efficiently transmitted from the driving to the driven shaft, minimizing power losses due to deformation or bending of the coupling.
  • Reduced Friction and Wear: Flexible couplings typically have a simple design with fewer moving parts. This simplicity leads to reduced friction and wear compared to more complex coupling types. Lower friction means less energy dissipation, resulting in improved power transmission efficiency.
  • Compatibility with Various Applications: Flexible couplings come in a wide range of designs and materials to suit different applications. Whether it's high-speed machinery, heavy-duty equipment, or precision systems, there are flexible coupling options optimized for each use case. Selecting the appropriate coupling for the specific application ensures efficient power transmission.

In summary, flexible couplings enhance power transmission efficiency by compensating for misalignment, damping vibrations, absorbing shock loads, providing torsional stiffness, reducing friction and wear, and offering compatibility with diverse applications. The combination of these features contributes to improved overall system efficiency and helps optimize the performance of mechanical systems.

flexible coupling

Can flexible couplings be used in precision manufacturing equipment, such as CNC machines?

Yes, flexible couplings can be used in precision manufacturing equipment, including CNC (Computer Numerical Control) machines. CNC machines require high accuracy and precision during operation to produce complex and intricate parts. Flexible couplings play a vital role in such equipment by providing various benefits that enhance their performance and reliability.

  • Compensation for Misalignment: CNC machines often have multiple moving parts and axes that need precise alignment. Flexible couplings can accommodate small misalignments between these components, ensuring smooth and reliable power transmission without inducing additional stress or strain on the system.
  • Vibration Damping: Precision manufacturing requires minimizing vibrations that could affect the quality of the finished product. Flexible couplings with damping properties can absorb and dissipate vibrations, resulting in better surface finishes and accuracy of the machined parts.
  • Torsional Flexibility: CNC machines may experience torque fluctuations during acceleration, deceleration, or tool changes. Flexible couplings with torsional flexibility can handle these variations and prevent torsional vibrations from affecting the machining process.
  • Backlash Compensation: Some types of flexible couplings, such as beam couplings, offer minimal or near-zero backlash. This characteristic is essential in CNC machines, as it helps maintain positional accuracy during direction changes and reversals.
  • High Torque Transmission: CNC machines may require high torque transmission capabilities, especially in heavy-duty cutting or milling operations. Flexible couplings can handle substantial torque loads while still providing flexibility to address misalignments.
  • Reduced Maintenance: With the ability to absorb shocks and compensate for misalignment, flexible couplings can extend the life of other mechanical components in the CNC machine, reducing overall maintenance requirements and downtime.

It's important to select the appropriate type and size of flexible coupling based on the specific requirements of the CNC machine, including torque, speed, misalignment, and environmental conditions. Regular maintenance and inspection of the flexible couplings will ensure optimal performance and contribute to the overall precision and efficiency of the CNC machine.

flexible coupling

Can flexible couplings be used for both motor-to-shaft and shaft-to-shaft connections?

Yes, flexible couplings can be used for both motor-to-shaft and shaft-to-shaft connections in various applications. The versatility of flexible couplings allows them to adapt to different types of connections and meet the specific requirements of the system.

Motor-to-Shaft Connections:

When connecting a motor to a shaft, a flexible coupling serves as an intermediary component that joins the motor shaft and the driven shaft. Flexible couplings are commonly used in motor-driven systems to accommodate misalignment between the motor and the driven load. In motor applications, flexible couplings help reduce stress and wear on the motor bearings, thus extending the motor's life and enhancing overall system reliability. They also act as vibration dampeners, minimizing vibrations transmitted from the motor to the driven shaft, and subsequently to connected equipment, ensuring smoother operation.

Shaft-to-Shaft Connections:

In many mechanical systems, such as those in the manufacturing, automation, and power transmission industries, shaft-to-shaft connections are required. A flexible coupling can bridge the gap between two shafts and transmit torque while accommodating misalignment. This type of coupling is commonly used to connect shafts that are not perfectly aligned due to factors like manufacturing tolerances, thermal expansion, or foundation settling. By allowing for misalignment, the flexible coupling protects the connected components from excessive stresses and ensures efficient power transmission.

Versatility and Advantages:

The ability of flexible couplings to handle both motor-to-shaft and shaft-to-shaft connections makes them versatile solutions for a wide range of industrial applications. Some of the advantages of using flexible couplings in these connections include:

  • Minimizing stress and wear on connected components, such as bearings and seals.
  • Compensating for misalignment, ensuring smooth power transmission.
  • Damping vibrations and shock loads, reducing the risk of mechanical failures.
  • Protecting equipment from excessive forces, enhancing system reliability.
  • Simplifying installation and alignment procedures, reducing downtime.
  • Improving overall system performance and operational efficiency.


Flexible couplings find applications in a wide range of industries, including manufacturing, material handling, automotive, aerospace, robotics, and more. Whether connecting a motor to a shaft or joining two shafts directly, flexible couplings play a crucial role in enhancing the reliability and efficiency of rotating machinery and mechanical systems.

In conclusion, flexible couplings can effectively serve as connectors for both motor-to-shaft and shaft-to-shaft connections, providing essential misalignment compensation and protection for connected equipment in various industrial applications.

China OEM DIN BS Universal Wide Range Flexible Ductile Iron Straight Coupling  China OEM DIN BS Universal Wide Range Flexible Ductile Iron Straight Coupling
editor by CX 2024-03-26

flexible shaft coupling

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