Product Description

SC Transmission FCL Flexible Shaft Couplings for Reducer and Motor


Product Description

FCL Coupling/Shaft Coupling /Pin & Bush Coupling /FCL Flexible Coupling/NBK FCL Coupling is widely used for its compacts designing, easy installation, convenient maintenance, small and light weight. 

As long as the relative displacement between shafts is kept within the specified tolerance, couplings will operate the best function and have a longer working life.

Thus it is greatly demanded in medium and minor power transmission systems driven by motors, such as speed reducers, hoists, compressors, conveyors, spinning and weaving machines and ball mills.

Product Parameters

SIZE     D D1 d1 L C n-M kg
FCL90 4 4000 90 35.5 11 28 3 4-M8 1.7
FCL100 10 4000 100 40 11 35.5 3 4-M10 2.3
FCL112 16 4000 112 45 13 40 3 4-M10 2.8
FCL125 25 4000 125 65 50 13 45 3 4-M12 4
FCL140 50 4000 140 71 63 13 50 3 6-M12 5.4
FCL160 110 4000 160 80 15 56 3 8-M12 8
FCL180 157 3500 180 90 15 63 3 8-M12 10.5
FCL200 245 3200 200 100 21 71 4 8-M20 16.2
FCL224 392 2850 224 112 21 80 4 8-M20 21.3
FCL250 618 2550 250 125 25 90 4 8-M24 31.6
FCL280 980 2300 280 140 34 100 4 8-M24 44
FCL315 1568 2050 315 160 41 112 4 10-M24 57.7
FCL355 2450 1800 355 180 60 125 5 8-M30 89.5
FCL400 3920 1600 400 200 60 125 5 10-M30 113
FCL450 6174 1400 450 224 65 140 5 12-M30 145
FCL560 9800 1150 560 250 85 160 5 14-M30 229
FCL630 15680 1000 630 280 95 180 5 18-M30 296



Company Profile



flexible coupling

Can flexible couplings be used in food processing and pharmaceutical industries?

Yes, flexible couplings can be used in both the food processing and pharmaceutical industries under certain conditions. These industries have stringent requirements for equipment used in their processes, including hygienic design, cleanliness, and resistance to contamination. Here’s how flexible couplings can be used in these industries:

  • Hygienic Design: In food processing and pharmaceutical applications, flexible couplings with hygienic designs are essential to prevent the accumulation of food particles, dust, or other contaminants. Stainless steel or FDA-approved materials are commonly used to ensure compliance with hygiene standards and ease of cleaning.
  • Cleanability: The equipment used in food processing and pharmaceutical industries must be easily cleanable to maintain product purity. Flexible couplings with smooth surfaces and no crevices or pockets that can trap particles are preferred.
  • Chemical Resistance: Some food processing and pharmaceutical applications involve the use of cleaning agents or chemicals. Flexible couplings must be resistant to these chemicals to prevent degradation and ensure long-term reliability.
  • Corrosion Resistance: In food processing and pharmaceutical environments, equipment is often exposed to washdowns and sanitizing solutions. Flexible couplings made of corrosion-resistant materials can withstand these conditions and maintain their performance over time.
  • Compliance with Standards: The food processing and pharmaceutical industries are subject to strict regulations and standards. Flexible couplings used in these industries should comply with relevant industry standards, such as FDA, EHEDG, or NSF standards.
  • Non-Toxic Materials: Flexible couplings used in direct contact with food or pharmaceutical products must be made of non-toxic materials that will not contaminate the process.
  • Resistant to Temperature Extremes: Some food and pharmaceutical processes involve extreme temperatures. Flexible couplings must be capable of withstanding high and low temperatures without compromising their integrity.

When selecting flexible couplings for food processing and pharmaceutical applications, it is essential to work closely with manufacturers and suppliers who understand the industry’s unique requirements. Customized solutions may be necessary to ensure that the couplings meet the specific needs of the application and comply with industry standards.

Summary: Flexible couplings can be used in food processing and pharmaceutical industries when they meet the necessary hygiene, cleanability, chemical resistance, corrosion resistance, compliance with standards, and temperature resistance requirements. Proper selection and application of flexible couplings can contribute to the efficiency and reliability of equipment in these critical industries.

flexible coupling

Can flexible couplings be used in the aerospace industry for critical applications?

Flexible couplings can be used in the aerospace industry for certain critical applications, but their usage is limited and carefully considered due to the stringent requirements and safety standards in the aerospace field. Here are some key points to consider:

  • Specific Applications: In the aerospace industry, flexible couplings are primarily used in non-flight-critical systems or non-safety-critical applications. They are commonly found in auxiliary equipment, ground support systems, and non-flight propulsion systems.
  • Weight and Space Constraints: Weight and space are crucial factors in aerospace applications. Flexible couplings must be lightweight and compact to minimize the impact on the overall weight and size of the aircraft or spacecraft.
  • High Reliability Requirements: Aerospace systems demand high reliability and fault tolerance. Flexible couplings used in critical applications must meet stringent reliability standards and undergo rigorous testing and certification to ensure their performance under extreme conditions.
  • Material Selection: Aerospace-grade materials are necessary to withstand the demanding environment of aerospace applications. These materials should have high strength-to-weight ratios, corrosion resistance, and excellent mechanical properties to handle the stresses and forces experienced during operation.
  • Certifications: Flexible couplings used in the aerospace industry must adhere to specific certifications and standards, such as those set by organizations like the Federal Aviation Administration (FAA) in the United States or the European Union Aviation Safety Agency (EASA) in Europe.
  • Redundancy and Safety Measures: In critical systems, redundancy and safety measures are paramount. Flexible couplings used in aerospace applications must be designed with redundancy features to ensure the system’s continued functionality in the event of a failure.
  • Temperature and Environmental Considerations: Aerospace systems experience a wide range of temperatures and environmental conditions. Flexible couplings must be able to operate reliably in extreme temperatures, high altitudes, and other challenging environments encountered during flight or space missions.

While flexible couplings have their place in certain aerospace applications, flight-critical and safety-critical systems typically rely on rigid, precision-engineered couplings. These rigid couplings offer higher levels of torque transmission and precision but require careful alignment and installation.

Ultimately, the selection of flexible couplings for aerospace applications must undergo a thorough engineering evaluation and be approved by the relevant regulatory authorities to ensure the highest level of safety and performance in critical aerospace systems.

flexible coupling

What are the advantages of using flexible couplings in mechanical systems?

Flexible couplings offer several advantages in mechanical systems, making them essential components in various applications. Here are the key advantages of using flexible couplings:

  • Misalignment Compensation: One of the primary advantages of flexible couplings is their ability to compensate for shaft misalignment. In mechanical systems, misalignment can occur due to various factors such as installation errors, thermal expansion, or shaft deflection. Flexible couplings can accommodate angular, parallel, and axial misalignment, ensuring smooth power transmission and reducing stress on the connected equipment and shafts.
  • Vibration Damping: Flexible couplings act as damping elements, absorbing and dissipating vibrations and shocks generated during operation. This feature helps to reduce noise, protect the equipment from excessive wear, and enhance overall system reliability and performance.
  • Torsional Flexibility: Flexible couplings provide torsional flexibility, allowing them to handle slight angular and axial deflections. This capability protects the equipment from sudden torque fluctuations, shock loads, and torque spikes, ensuring smoother operation and preventing damage to the machinery.
  • Overload Protection: In case of sudden overloads or torque spikes, flexible couplings can absorb and distribute the excess torque, protecting the connected equipment and drivetrain from damage. This overload protection feature prevents unexpected failures and reduces downtime in critical applications.
  • Reduce Wear and Maintenance: By compensating for misalignment and damping vibrations, flexible couplings help reduce wear on the connected equipment, bearings, and seals. This results in extended component life and reduced maintenance requirements, leading to cost savings and improved system reliability.
  • Compensation for Thermal Expansion: In systems exposed to temperature variations, flexible couplings can compensate for thermal expansion and contraction, maintaining proper alignment and preventing binding or excessive stress on the equipment during temperature changes.
  • Electric Isolation: Some types of flexible couplings, such as disc couplings, offer electrical isolation between shafts. This feature is beneficial in applications where galvanic corrosion or electrical interference between connected components needs to be minimized.
  • Space and Weight Savings: Flexible couplings often have compact designs and low inertia, which is advantageous in applications with space constraints and where minimizing weight is crucial for performance and efficiency.
  • Cost-Effectiveness: Flexible couplings are generally cost-effective solutions for power transmission and motion control, especially when compared to more complex and expensive coupling types. Their relatively simple design and ease of installation contribute to cost savings.

In summary, flexible couplings play a vital role in mechanical systems by providing misalignment compensation, vibration damping, overload protection, and torsional flexibility. These advantages lead to improved system performance, reduced wear and maintenance, and enhanced equipment reliability, making flexible couplings a preferred choice in various industrial, automotive, marine, and aerospace applications.

China Hot selling FCL Flexible Shaft Couplings for Reducer and Motor  China Hot selling FCL Flexible Shaft Couplings for Reducer and Motor
editor by CX 2023-12-13