Product Description

 Excavator Coupling Assy 45H  Flexible Shaft Coupling for Hydraulic Pump

NO. LB NO. Model OEM NO. Name NO. LB NO. Model OEM NO. Name NO. LB NO. Model OEM NO. Name
1 FG-Q2001   25H  162*92 COUPLING 22 FG-Q2571 16A 155*76 COUPLING 43 FG-Q2043 S32S 235*97 COUPLING
2 FG-Q2002 MS110 DH55 30H 195*105 COUPLING  23 FG-Q2571 16AS 155*76 COUPLING 44 KLB-Q2044 S25S 163*58 COUPLING
3 FG-Q2003 30H  195*105 COUPLING ASSY 24 FG-Q2571 22A 153*76 COUPLING 45 KLB-Q2045 E200B 14T     COUPLING
4 FG-Q2004 EX200-2 40H 170*90 COUPLING 25 FG-Q2571 25A 185*102 COUPLING 46 KLB-Q2046 50AC 14T  205*40 COUPLING
5 FG-Q2005 40H   170*90 COUPLING ASSY 26 FG-Q2026 25AS 185*102 COUPLING 47 KLB-Q2047 SH280   COUPLING
6 FG-Q2006 45H  183*92 COUPLING 27 FG-Q2571 28A 178*93 COUPLING 48 KLB-Q2048 E200B  12T   COUPLING
7 FG-Q2007 45H 183*92 COUPLING ASSY 28 FG-Q2571 28AS 178*93 COUPLING 49 KLB-Q2049 50AM  16T 205*45 COUPLING
8 FG-Q2008 90H  203*107 COUPLING 29 FG-Q2571 30A 215*118 COUPLING 50 KLB-Q2050 SH200 14T  205*40 COUPLING
9 FG-Q2009 90H  203*107 COUPLING ASSY 30 FG-Q2030 30AS 215*118 COUPLING 51 KLB-Q2051 E330C 350*145 COUPLING
10 FG-Q2571 50H  195*110 COUPLING 31 FG-Q2031 50A 205*108 COUPLING 52 KLB-Q2052 E330C   COUPLING
11 FG-Q2011 50H   195*110 COUPLING ASSY 32 FG-Q2032 50AS  205*108 COUPLING 53 KLB-Q2053 168mm*48m 26T 3H   COUPLING
12 FG-Q2012 110H  215*110 COUPLING 33 FG-Q2033 90A 272*140 COUPLING 54 KLB-Q2054 242mm*72mm 50T 8H   COUPLING
13 FG-Q2013 110H 215*110 COUPLING ASSY 34 FG-Q2034 90AS 272*140 COUPLING 55 KLB-Q2055 295mm*161mm 48T 12H   COUPLING
14 FG-Q2014 140H  245*125 COUPLING 35 FG-Q2035 140A 262*132 COUPLING 56 KLB-Q2056 352mm*161mm 48T 8H   COUPLING
15 FG-Q2015 140H   245*125 COUPLING ASSY 36 FG-Q2036 140AS 262*132 COUPLING 57 KLB-Q2057 352mm*161mm 46T 8H   COUPLING
16 FG-Q2016 160H  255*134 COUPLING 37 FG-Q2037 E300B  16T  278*54 COUPLING 58 KLB-Q2058 318mm*72mm 50T 8H   COUPLING
17 FG-Q2017 160H  255*134 COUPLING ASSY 38 FG-Q2038 E450 16T 360*52 COUPLING 59 KLB-Q2059 315mm 42T   COUPLING
18 FG-Q2018 4A 104*53 COUPLING 39 FG-Q2039 SH430   12T  205*35 COUPLING 60 KLB-Q2060 268mm*100mm 42T 6H   COUPLING
19 FG-Q2019 4AS 104*53 COUPLING 40 FG-Q2040 SH200 14T  205*40 COUPLING 61 KLB-Q2061 167mm*90mm 47T 3H   COUPLING
20 FG-Q2571 8A 130*70 COUPLING 41 FG-Q2041 50ASM  20T  205*40 COUPLING 62 KLB-Q2062 182mm 42T    COUPLING
21 FG-Q2571 8AS 130*70 COUPLING 42 FG-Q2042 SH160(SH60)  15T 173*22 COUPLING 63 KLB-Q2063 220mm 46T    COUPLING


Ntly Asked Questions:

Q1. What are your packaging conditions?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have a legally registered patent, we can package the goods in your branded box CHINAMFG receipt of your authorization letter.

Q2: What are your payment terms?
A: T/T 30% as deposit and 70% before delivery. We will show you photos of the products and packaging before you pay the balance.

Q3. What are your delivery terms?
A : FOB price

Q4. What is your delivery time?
A: Generally speaking, it takes 15 to 30 days after receiving the advance payment. The exact delivery time depends on the item and quantity of your order. Q5: How do you

keep our business in a long term good relationship?
A: 1. We maintain good quality and competitive prices to ensure our customers benefit; 

     2.We are sincere in doing business and making friends

Our advantages:
1.Professional: we have about 10 years of experience in the field of mechanical parts and accessories .
2. Quality assurance: we cooperate with major OEM factories in China. We will check the goods strictly before sending to customers.
3. Competitive price: We offer wholesale price for OEM; high quality and after-sale parts.
4. All goods are sufficient to meet your one-stop purchase.
5. One-stop service: you can contact us at any time if you have any questions after you receive the goods. One sale will complete the whole case for the customer.
6. Cheapest shipping cost: We have cooperated with the best freight forwarder for many years, we can quote the cheapest way of shipping for you.

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flexible coupling

How do you install and align a flexible coupling properly to ensure optimal performance?

Proper installation and alignment of a flexible coupling are essential to ensure its optimal performance and longevity. Incorrect installation can lead to premature wear, increased vibrations, and potential equipment failure. Below are the steps to install and align a flexible coupling properly:

1. Pre-Installation Inspection:

Before installation, inspect the flexible coupling and its components for any visible damage or defects. Check that the coupling’s size and specifications match the application requirements. Ensure that the shafts and equipment connected to the coupling are clean and free from debris.

2. Shaft Preparation:

Prepare the shafts by removing any oil, grease, or contaminants from the surfaces that will come into contact with the coupling. Ensure that the shaft ends are smooth and free from burrs that could affect the fit of the coupling.

3. Coupling Hub Installation:

Slide the coupling hubs onto the shafts, ensuring they are positioned securely and evenly on each shaft. Use a lubricant recommended by the manufacturer to facilitate the installation and ensure a proper fit.

4. Alignment:

Proper alignment is critical for the performance and longevity of the flexible coupling. Align the shafts by checking both angular and parallel misalignment. Utilize precision alignment tools, such as dial indicators or laser alignment systems, to achieve accurate alignment. Follow the manufacturer’s alignment specifications and tolerance limits.

5. Tightening Fasteners:

Once the shafts are properly aligned, tighten the coupling’s fasteners to the manufacturer’s recommended torque values. Gradually tighten the fasteners in a cross pattern to ensure even distribution of the load on the coupling hubs. Avoid over-tightening, as it may cause distortion or damage to the coupling.

6. Run-Out Check:

After installation, perform a run-out check to verify that the coupling’s rotating components are balanced and aligned. Excessive run-out can lead to vibrations and reduce the coupling’s performance. If significant run-out is detected, recheck the alignment and address any issues that may be causing it.

7. Lubrication:

Ensure that the flexible coupling is adequately lubricated, following the manufacturer’s recommendations. Proper lubrication reduces friction and wear, enhancing the coupling’s efficiency and reliability.

8. Periodic Inspection and Maintenance:

Regularly inspect the flexible coupling for signs of wear, misalignment, or damage. Address any issues promptly to prevent further problems. Depending on the coupling type and application, scheduled maintenance may include re-greasing, re-alignment, or replacing worn components.


Proper installation and alignment are crucial for ensuring the optimal performance and longevity of a flexible coupling. Following the manufacturer’s guidelines, inspecting the components, achieving accurate alignment, and using the appropriate lubrication are key steps in the installation process. Regular inspection and maintenance help to identify and address potential issues, ensuring the coupling continues to operate smoothly and efficiently in the mechanical system.

flexible coupling

How does a flexible coupling handle torsional vibrations in rotating machinery?

A flexible coupling is designed to handle torsional vibrations in rotating machinery by providing a degree of flexibility and damping. Torsional vibrations are oscillations that occur in the drivetrain due to torque variations, sudden load changes, or other transient events. These vibrations can lead to resonance, excessive stress, and premature failure of components.

Flexible couplings mitigate torsional vibrations through the following mechanisms:

  • Torsional Compliance: Flexible couplings have an element, such as an elastomeric insert, that can deform or twist to absorb torsional shocks. When the drivetrain experiences torsional vibrations, the flexible element flexes, effectively isolating and dampening the vibrations before they propagate further.
  • Damping: Many flexible couplings have inherent damping properties, especially those with elastomeric components. Damping dissipates the energy of the torsional vibrations, reducing their amplitude and preventing resonance from occurring.
  • Tuned Design: Some flexible couplings are specifically designed with specific torsional characteristics to match the drivetrain’s requirements. By tuning the coupling’s stiffness and damping properties, engineers can ensure optimal torsional vibration control.
  • Torsional Stiffness: While flexible couplings provide flexibility to absorb vibrations, they also offer a degree of torsional stiffness to maintain the torque transmission efficiency between the shafts.

It is important to select the appropriate flexible coupling based on the specific torsional characteristics and requirements of the rotating machinery. Different applications may demand different types of couplings with varying levels of flexibility and damping. High-performance flexible couplings can effectively minimize torsional vibrations, protecting the drivetrain and connected equipment from excessive stress and potential damage.

Additionally, proper alignment of the flexible coupling during installation is crucial to ensure its optimal performance in mitigating torsional vibrations. Misalignment can introduce additional stresses and exacerbate torsional issues in the system. Regular inspection and maintenance of the flexible coupling will help identify any signs of wear or damage that may affect its ability to handle torsional vibrations effectively.

flexible coupling

How does a flexible coupling affect the noise and vibration levels in a mechanical system?

A flexible coupling plays a crucial role in controlling noise and vibration levels in a mechanical system. It can significantly impact the overall smoothness and quietness of the system’s operation, contributing to enhanced performance and reduced wear on connected components.

Noise Reduction:

Flexible couplings help reduce noise in a mechanical system through their inherent ability to dampen vibrations. When the shafts of rotating machinery are not perfectly aligned, it can lead to vibrations that are transmitted throughout the system, resulting in noise generation. The elastomeric or flexible element of the coupling acts as a vibration dampener, absorbing and dissipating these vibrations. As a result, the noise levels in the system are reduced, creating a quieter operating environment.

Vibration Damping:

Vibrations in a mechanical system can lead to increased wear and tear on critical components, such as bearings, seals, and gears. Excessive vibrations can also cause resonance and damage to the system over time. Flexible couplings can effectively dampen vibrations by acting as a buffer between the driving and driven shafts. The flexible element absorbs the shock and vibrations, preventing them from propagating to other parts of the system. This vibration damping capability not only reduces noise but also protects the system from potential mechanical failures, extending the lifespan of the equipment.

Alignment Compensation:

Misalignment between shafts is a common cause of vibration and noise in rotating machinery. Flexible couplings excel at compensating for both angular and parallel misalignment. By accommodating misalignment, the coupling reduces the forces acting on the shafts and minimizes the generation of vibrations and noise. Proper alignment through the use of a flexible coupling ensures that the system operates smoothly and quietly.

Effect on Equipment Reliability:

Reducing noise and vibration levels has a positive impact on the reliability of connected equipment. Lower vibrations mean less stress on bearings and other rotating components, leading to extended component life and reduced maintenance requirements. A quieter operating environment can also be essential for certain applications, such as in laboratories or precision manufacturing processes, where excessive noise can interfere with delicate tasks or measurements.


Flexible couplings find application in a wide range of industries, such as manufacturing, power generation, material handling, automotive, aerospace, and robotics. They are commonly used in pumps, compressors, fans, conveyors, and other rotating machinery where noise and vibration control are critical for smooth and reliable operation.


A flexible coupling’s ability to reduce noise and dampen vibrations makes it an essential component in mechanical systems. By compensating for misalignment and providing vibration dampening properties, the flexible coupling enhances the overall system performance, reduces noise levels, and protects connected equipment from excessive wear and mechanical failures. Choosing the right type of flexible coupling based on the specific application requirements can have a significant impact on noise reduction and vibration control in the mechanical system.

China Best Sales Excavator Coupling Assy 45h Flexible Shaft Coupling for Hydraulic Pump  China Best Sales Excavator Coupling Assy 45h Flexible Shaft Coupling for Hydraulic Pump
editor by CX 2023-12-25