China high quality Set Screw Coupling Gh-20X25 Oldham Type Coupling oldham coupling

Product Description

GH Oldham type coupling cross sliding set screw coupling


Description of
 GH Oldham type coupling cross sliding set screw coupling
>The colloid material is imported PA66, which has good wear resistance, corrosion resistance and electrical insulation
>Sliding design can compensate radial and angular deviation more effectively
>Detachable design, easy to install
>Fastening method of clamping screw

Dimensions of GH Oldham type coupling cross sliding set screw coupling

  

model parameter common bore diameter d1,d2 ΦD L LF LP F M tightening screw torque
(N.M)
GH-16X18 4,5,6,6.35,7,8 16 18 7.1 11.6 3.55 M3 0.7
GH-20X25 5,6,6.35,7,8,9,9.525 20 25 9.1 12.7 4.55 M4 1.7
GH-25X28 5,6,6.35,8,9,9.525,10,11,12,14 25 28 11.7 16.65 5.58 M4 1.7
GH-32×33 5,6,8,9,9.525,10,11,12,12.7,14,15,16 32 33 14 19.5 7 M4 1.7
GH-40X35 8,9,9.525,10,11,12,12.7,14,14,16,17,18,19,20 40 35 15.5 18.4 7.75 M4 1.7
GH-45X46 8,9,9.525,10,11,12.7,14,15,16,17,18,19,20,22 45 46 21.5 18.4 9 M5 4
GH-50X38 10,12,12.7,14,15,16,17,18,19,20,22,24,25 50 38 16.5 15 8.25 M5 4
GH-55X57 10,12,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32 55 57 27 17.5 10.5 M5 4
GH-63X47 14,15,16,17,18,19,20,22,24,25,28,30,32 63 47 21 17.5 10.5 M6 8.4
GH-70X77 16,17,18,19,20,22,24,25,28,30,32,38,40 70 77 36.5 25 13.5 M8 10.5

 

model parameter Rated torque
(N.M)*
allowable eccentricity
(mm)*
allowable deflection angle
(°)*
allowable axial deviation
(mm)*
maximum speed
rpm
static torsional stiffness
(N.M/rad)
moment of inertia
(Kg.M2)
Material of shaft sleeve Material of shrapnel surface treatment weight
(g)
GH-16X18 0.7 0.8 3 ±0.2 9000 30 3.3×10-7 High strength aluminum alloy P A 6 6 Anodizing treatment 6
GH-20X25 1.2 1.2 3 ±0.2 7000 58 1.1×10-6 18
GH-25X28 2 1.6 3 ±0.2 6000 130 3.1×10-6 25
GH-32×33 4.5 2 3 ±0.2 4800 270 9.6×10-6 44
GH-40X35 9 2.4 3 ±0.2 3600 520 2.3×10-5 81
GH-45X46 12 2.8 3 ±0.2 3500 560 3.8×10-5 136
GH-50X38 19 2.6 3 ±0.2 3000 800 1.8×10-4 142
GH-55X57 22 3.3 3 ±0.2 2800 795 8.0×10-4 255
GH-63X47 19 3 3 ±0.2 2500 1200 8.3×10-4 320
GH-70X77 56 3.8 3 ±0.2 2500 1260 3.9×10-4 445

 

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oldham coupling

Can an Oldham Coupling Reduce Vibration and Backlash in Mechanical Systems?

Yes, an Oldham coupling can help reduce vibration and minimize backlash in mechanical systems, making it a popular choice for applications that require precise and smooth power transmission.

Vibration Reduction: Oldham couplings are designed with a three-piece construction, comprising two hubs and a center disc. The center disc, also known as the spacer, is made of a flexible material such as acetal or nylon. When torque is transmitted through the coupling, the center disc flexes, absorbing any misalignment between the shafts. This flexing action helps dampen vibration and reduces resonance in the system, leading to smoother operation and less mechanical stress on connected components.

Backlash Minimization: Backlash is the amount of play or free movement between the mating parts of a mechanical system. In traditional couplings like gear couplings, there can be significant backlash due to the nature of the gear teeth. However, Oldham couplings have a unique design that allows them to transmit torque with minimal backlash. The center disc provides a small amount of clearance between the hubs, enabling smooth rotation without backlash. This characteristic is especially beneficial in applications that require precise motion control, such as robotics and CNC machines.

Overall, the flexible and backlash-free nature of Oldham couplings makes them well-suited for applications where vibration reduction and precise motion control are essential. By reducing vibration and backlash, Oldham couplings contribute to the overall efficiency, accuracy, and reliability of the mechanical system they are employed in.

oldham coupling

Differences Between Oldham Couplings and Other Types of Flexible Couplings

Oldham couplings are a type of flexible coupling used in mechanical systems to transmit torque between two shafts. Here are some key differences between Oldham couplings and other types of flexible couplings:

  • Mechanism of Torque Transmission: Oldham couplings use a sliding motion between the center disc and the hubs to transmit torque. The center disc has slots that engage with pins on the hubs, allowing for torque transmission while accommodating misalignment. In contrast, other flexible couplings, such as jaw couplings or beam couplings, typically use elastic materials or flexible elements like rubber or springs to transmit torque.
  • Misalignment Compensation: Oldham couplings are specifically designed to handle angular misalignment between shafts. They can accommodate parallel misalignment to a limited extent but are not well-suited for axial misalignment. Other flexible couplings like beam couplings or bellows couplings may offer more comprehensive misalignment compensation, including axial misalignment.
  • Backlash: Oldham couplings have a small amount of backlash due to the clearance between the center disc and the hubs. This backlash can be beneficial in some applications to reduce shock loads and vibrations. However, other flexible couplings like beam couplings or jaw couplings may have minimal or zero backlash.
  • Construction and Materials: Oldham couplings are typically made of materials like aluminum for the hubs and center disc, and acetal or other plastics for the center disc’s sliding parts. Other flexible couplings come in various materials, including aluminum, stainless steel, elastomers, and composite materials, depending on the application’s requirements.
  • Operating Speed: Oldham couplings are suitable for moderate to high rotational speeds, but their speed limitations depend on the material and design. Some other flexible couplings, such as bellows couplings, can handle even higher speeds due to their construction.
  • Applications: Oldham couplings are commonly used in applications that require moderate torque transmission and angular misalignment compensation, such as pumps, packaging machines, and automation equipment. Other flexible couplings are used in a wide range of applications, including motion control systems, robotics, aerospace, and automotive industries, where specific coupling characteristics are needed.

Choosing the right flexible coupling depends on the specific requirements of the application, including torque, misalignment, speed, space constraints, and environmental conditions. Engineers and designers should carefully consider these factors to select the most appropriate coupling for their mechanical system.

oldham coupling

Advantages of Using an Oldham Coupling Compared to Other Types of Couplings

An Oldham coupling offers several advantages over other types of couplings, making it a preferred choice in certain applications:

  • Misalignment Compensation: The Oldham coupling can handle both angular and axial misalignments between shafts. It allows for up to a few degrees of misalignment while transmitting torque smoothly, reducing the risk of premature wear and failure caused by misalignment.
  • No Backlash: Unlike some other flexible couplings, the Oldham coupling has minimal backlash. This means there is little to no play or clearance between the coupling components during rotation, ensuring precise torque transmission and positioning in high-precision applications.
  • Vibration and Noise Damping: The sliding action of the middle block in the coupling helps to isolate the shafts from each other, reducing vibrations and noise during operation. This feature is beneficial in applications where vibration dampening is critical to equipment performance and longevity.
  • High Torque Transmission: Oldham couplings can handle relatively high torque transmission, making them suitable for applications with moderate to high torque requirements.
  • Low Maintenance: Due to its design, the Oldham coupling experiences minimal wear during operation, leading to lower maintenance requirements and longer service life.
  • Easy Installation: Oldham couplings are relatively easy to install and remove, simplifying maintenance and replacement procedures.
  • Electrically Insulating: Some Oldham couplings are available with non-conductive materials, providing electrical isolation between shafts, which is essential in certain applications.
  • Cost-Effective: Compared to other high-performance couplings, Oldham couplings are often more cost-effective, providing reliable performance without breaking the budget.

Overall, the Oldham coupling is an excellent choice in applications where misalignment compensation, precision torque transmission, vibration dampening, and low maintenance are critical factors for successful operation. Its unique design and features make it suitable for various industrial and automation systems, contributing to smoother and more efficient mechanical power transmission.

China high quality Set Screw Coupling Gh-20X25 Oldham Type Coupling  oldham couplingChina high quality Set Screw Coupling Gh-20X25 Oldham Type Coupling  oldham coupling
editor by CX 2024-04-09