Product Description

GR Aluminum alloy bellows setscrew coupling

Description of GR Aluminum alloy bellows setscrew coupling
>The material is aluminum alloy, and the middle bellows is made of stainless steel with excellent corrosion resistance
>Laser welding is used between bellows and shaft sleeve, with zero rotation clearance, suitable for CHINAMFG and reverse rotation
>Bellows structure can effectively compensate radial, angular and axial deviation
>Designed for servo motor stepper mot

Dimensions of GR Aluminum alloy bellows setscrew coupling

model parameter common bore diameter d1,d2 ΦD L LI L2 L3 N F M tightening screw torque
GR-16×27 4,5,6,6.35,7,8 16 27 7.5 2 8 13.5 3 M3 0.7
GR-20×32 5,6,6.35,7,8,9,9.525,10,11,12 20 32 7.2 2.8 12 18 3.5 M3 0.7
GR-22.5×34 5,6,6.35,7,8,9,9.525,10,11,12 22.5 34 8.05 2.8 12.3 20.2 4.5 M4 1.7
GR-25×37 6,6.35,7,8,9,9.525,10,11,12 25 37 9.5 3 12 20.2 4.5 M4 1.7
GR-32×42 8,9,10,11,12,12.7,14,15 32 42 8 4 18 27.2 5.5 M5 4
GR-40×51 8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20 40 51 9.5 6 20 34.5 5.5 M5 4
GR-55×57 10,11,12,12.7,14,15,16,17,18,19,20,22,24,25 55 57 9 6 27 51.9 6.25 M6 7
GR-65×81 10,11,12,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32,35,38 65 81 19.5 7 28 60.5 8.9 M6 7

model parameter Rated torque
allowable eccentricity
allowable deflection angle
allowable axial deviation
maximum speed
static torsional stiffness
moment of inertia
Material of shaft sleeve surface treatment weight
GR-16×27 0.8 0.1 2 + 0.4 -1.2 20000 150 7.9×10-7 High strength aluminum alloy Anodizing treatment 8
GR-20×32 1.5 0.1 2 + 0.6 -1.8 18000 220 2.0×10-6 13
GR-22.5×34 1.8 0.15 2 + 0.6 -1.8 16000 300 6.2×10-6 22
GR-25×37 2.0 0.15 2 + 0.6 -1.8 15000 330 6.7×10-6 30
GR-32×42 2.5 0.2 2 + 0.8 -2.5 11000 490 2.0×10-5 53
GR-40×51 6.4 0.3 2 + 0.8 -2.5 10000 530 2.1×10-5 85
GR-55×57 12 0.3 2 + 0.8 -2.5 9000 860 2.8×10-5 170
GR-65×81 18 0.2 2 + 0.7 -2.5 4500 900 2.3×10-5 280


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bellows coupling

How Do Bellows Couplings Contribute to Reducing Vibrations and Ensuring Smooth Operation?

Bellows couplings play a crucial role in reducing vibrations and ensuring smooth operation in mechanical power transmission systems. They achieve this through their unique design and material characteristics, which allow them to absorb and dampen vibrations effectively. Here’s how bellows couplings contribute to minimizing vibrations and promoting smooth operation:

  • Flexible Bellows Design: Bellows couplings feature a thin-walled, accordion-like structure known as the bellows. This design provides flexibility in multiple directions, allowing the coupling to compensate for minor misalignments and shaft movements. The bellows’ flexing action absorbs shocks and vibrations, preventing them from propagating through the system and reducing the transmission of vibration to connected equipment.
  • Vibration Damping: The flexible bellows act as a vibration damper, absorbing and dissipating vibrational energy generated during the operation. When the system experiences dynamic forces or sudden shocks, the bellows expand and contract to absorb these forces, preventing them from resonating throughout the system. This damping action helps maintain the stability of the machinery and prevents excessive wear and tear on components.
  • No Mechanical Contact: Unlike some coupling types that rely on friction or mechanical contact, bellows couplings transmit torque through pure flexure without any metal-to-metal contact. This feature eliminates backlash and torsional wind-up, further reducing vibration and ensuring smoother operation. As a result, bellows couplings are well-suited for applications requiring high precision and minimal vibration-induced errors.
  • High Torsional Stiffness: While bellows couplings are designed to be flexible, they still possess high torsional stiffness. This stiffness ensures accurate torque transmission without any loss, contributing to the overall efficiency and smoothness of the system’s operation.
  • Resonance Avoidance: Bellows couplings are designed to have specific critical speeds and resonant frequencies that prevent resonance from occurring within the coupling itself. Resonance can lead to severe vibration amplification, which can be detrimental to the equipment and surrounding components. The careful design of bellows couplings helps avoid such resonance issues.

By effectively dampening vibrations, absorbing shocks, and providing torsional stiffness, bellows couplings contribute to smoother operation, reduced mechanical wear, and increased overall system reliability. Their ability to handle misalignments and their high torsional stiffness make them a popular choice in precision motion control systems, robotics, and various industrial applications where smooth and accurate performance is essential.

bellows coupling

Can Bellows Couplings be Customized or Adapted to Specific Industrial Needs?

Yes, bellows couplings can be customized or adapted to meet specific industrial needs. Manufacturers of bellows couplings often offer a range of customization options to ensure that the couplings can effectively address the unique requirements of different applications and industries.

The customization options for bellows couplings may include:

  • Material Selection: Manufacturers can offer a variety of materials for the bellows coupling based on factors such as corrosion resistance, temperature tolerance, and mechanical properties. Different materials, such as stainless steel, aluminum, or specialized alloys, can be chosen to suit the specific demands of the application.
  • Size and Dimensions: Bellows couplings can be produced in various sizes and dimensions to accommodate different shaft diameters and spacing requirements. Custom sizing ensures a proper fit and optimal performance in the given system.
  • Design Modifications: Manufacturers can make design modifications to the bellows coupling to suit specific environmental conditions or to address unique challenges in a particular application. These modifications may include changes to the shape of the bellows, the number of convolutions, or the addition of protective features.
  • Electrical Isolation: For applications requiring electrical isolation between shafts, bellows couplings can be customized with insulating materials to prevent the flow of electric currents between the connected components.
  • Performance Enhancements: Couplings can be designed to provide enhanced performance characteristics, such as higher torque capacity or improved torsional stiffness, based on the requirements of the application.

By collaborating with coupling manufacturers or consulting with engineering experts, industrial users can outline their specific needs and constraints. This information helps in the customization or adaptation of bellows couplings to create a solution that optimally meets the demands of the intended application.

It is important to work closely with reputable coupling suppliers or manufacturers who have experience in providing customized solutions. Such collaboration ensures that the final bellows coupling design aligns with the intended industrial needs and delivers reliable and efficient performance in the designated application.

bellows coupling

What is a Bellows Coupling, and How is it Used in Mechanical Power Transmission?

A bellows coupling is a type of flexible coupling used in mechanical power transmission systems to connect two shafts while allowing for angular misalignment, axial motion, and torsional flexibility. It consists of a thin-walled metallic bellows element that resembles an accordion or bellows, which gives the coupling its name. The bellows is typically made of stainless steel, providing it with the necessary flexibility and durability for various applications.

When used in mechanical power transmission, a bellows coupling accommodates misalignments between the connected shafts. These misalignments can be in the form of angular misalignment, where the shafts are not perfectly aligned in a straight line, or axial misalignment, where there is some linear movement along the shaft axis. Additionally, the bellows element provides torsional flexibility, allowing the coupling to transmit torque while compensating for slight shaft misalignments.

The bellows coupling works by absorbing and redistributing the misalignment forces through the flexing of the bellows element. As the shafts rotate, any misalignment causes the bellows to flex, allowing the coupling to maintain a continuous transmission of torque while reducing stress on the connected shafts. This flexibility also helps dampen vibrations and shock loads, protecting the connected components from excessive wear and fatigue.

One of the significant advantages of using a bellows coupling is its high torsional stiffness. The bellows element provides excellent torsional rigidity, making it suitable for applications where precise motion control and minimal torsional backlash are essential.

Bellows couplings find applications in various industries, including robotics, aerospace, medical devices, semiconductor manufacturing, and precision machinery. They are commonly used in applications where accurate positioning, high torque transmission, and compensating for misalignments are critical requirements.

In summary, a bellows coupling is a flexible and robust coupling solution that allows for angular misalignment, axial motion, and torsional flexibility in mechanical power transmission systems. Its ability to accommodate misalignments while maintaining high torsional stiffness makes it a preferred choice in precision positioning and motion control applications.

China Standard Aluminum Alloy Bellows Setscrew Coupling Gr-55X57  China Standard Aluminum Alloy Bellows Setscrew Coupling Gr-55X57
editor by CX 2024-04-04