China Professional Rigid Coupling GM-50X50 Set Screw Series Coupling Winding Coupling

Product Description

GM screw thread setscrew series coupling winding coupling

Description of GM screw thread setscrew series coupling winding coupling
>Integrated structure, the overall use of high-strength aluminum alloy materials
>Elastic action compensates radial, angular and axial deviation
>Spring design, with buffer effect
>Special design for encoder, micro motor
>Fastening method of set screw

Dimensions of GM screw thread setscrew series coupling winding coupling

model parameter common bore diameter d1,d2 ΦD L L1 L2 F M tightening screw torque
GM-12xl8.5 2,3,4,5,6,6.35 12 18.5 1.8 0.4 3.5 M3 0.7
GM-15.5×21 3,4,5,6,6.35,7 15.5 21 2 0.4 3.3 M3 0.7
GM-15.5×23 3,4,5,6,6.35,7 15.5 23 2 0.4 3.6 M3 0.7
GM-19.1×19.1 4,5,6,6.35,7,8 17.5 23 2 0.4 3.6 M4 1.7
GM-17.5×23 4,5,6,6.35,7,8,10 19.1 19.1 2 0.4 3 M4 1.7
GM-19.5×24.5 6,6.35,7,8,9,9.525,10 19.5 24.5 2 0.4 3.3 M4 1.7
GM-25×32 5,6,6.35,7,8,9,9.525,10,11,12,12.7 25 32 2 0.4 3.7 M4 1.7
GM-25.4×25.4 6,6.35,7,8,9,9.525,10,11,12,12.7 25.4 25.4 2 0.4 3.7 M4 1.7
GM-28.6×28.6 8,9,9.525,10,11,12,12.7,14 28.6 28.6 2.75 0.4 4.2 M4 1.7
GM-32×32 8,9,9.525,10,11,12,12.7,14,15,16,17,18 32 32 2.75 0.4 5.5 M4 1.7
GM-32×41 8,9,9.525,10,11,12,12.7,14,15,16,17,18 32 41 2.75 0.4 6.8 M4 1.7
GM-38.7×38.1 8,10,11,12,12.7,14,15,16,17,18,19,20,22 38.1 38.1 3 0.4 5.2 M5 4
GM-42×50 12,12.7,14,15,16,17,18,19,20,22,24,25,28 42 50 3.5 0.4 8.5 M6 7
GM-50×50 12,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32 50 50 3.5 0.5 8.5 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
GM-12xl8.5 0.3 0.15 3 ±0.2 30000 40 8.0×10-7 High strength aluminum alloy Anodizing treatment 4
GM-15.5×21 0.5 0.15 3 ±0.2 25000 80 2.8×10-7 7.7
GM-15.5×23 0.5 0.15 3 ±0.2 25000 50 2.9×10-7 9.3
GM-17.5×23 0.6 0.15 3 ±0.2 25000 85 3.5×10-7 12.7
GM-19.1×19.1 0.9 0.15 3 ±0.2 24000 130 7.2×10-7 11.6
GM-19.5×24.5 1 0.15 3 ±0.2 19000 150 8.1×10-7 16
GM-25×32 2 0.15 3 ±0.2 15000 300 3.5×10-7 32
GM-25.4×25.4 2 0.15 3 ±0.2 14000 360 2.3×10-6 26
GM-28.6×28.6 2 0.15 3 ±0.2 14000 380 2.3×10-6 39
GM-32×32 3 0.15 3 ±0.2 13000 380 2.5×10-6 57
GM-32×41 4 0.15 3 ±0.2 12000 450 9.6×10-6 65
GM-38.7×38.1 6.5 0.15 3 ±0.2 9500 400 2.7×10-5 97
GM-42×50 8 0.15 3 ±0.2 9000 500 7.2×10-3 185
GM-50×50 20 0.15 3 ±0.2 8000 785 8.1×10-5 220


rigid coupling

What Are the Maintenance Requirements for Rigid Couplings?

Rigid couplings are known for their simplicity and low maintenance requirements. Since they do not have moving parts or flexible elements, there are minimal wear and tear issues. However, some maintenance considerations for rigid couplings include:

1. Regular Inspection: It is essential to perform periodic inspections of the rigid couplings to check for any signs of wear, damage, or misalignment. Regular inspections can help identify potential issues early and prevent further problems.

2. Shaft Alignment: Proper shaft alignment is critical for rigid couplings. During installation or whenever maintenance work is performed on the connected machinery, the shaft alignment must be checked and adjusted if necessary. Misalignment can lead to premature coupling failure and cause additional stress on connected equipment.

3. Lubrication: Most rigid couplings do not require lubrication since they have no moving parts. However, some special designs or large-sized couplings may have set screws or other fasteners that require lubrication. It is essential to follow the manufacturer’s guidelines regarding lubrication, if applicable.

4. Corrosion Protection: In corrosive environments, protecting the rigid couplings from corrosion is crucial. This can be achieved through the use of corrosion-resistant materials or coatings.

5. Periodic Re-tightening: If the rigid coupling uses set screws or other fasteners, periodic re-tightening may be necessary to maintain the integrity of the connection. This is particularly important in applications with high vibrations or heavy loads.

6. Temperature Considerations: Rigid couplings may experience thermal expansion or contraction, especially in high-temperature environments. It is essential to consider the thermal expansion characteristics of the coupling material and the connected shafts to ensure proper functioning under varying temperatures.

7. Professional Maintenance: In complex systems or critical applications, it is advisable to seek professional maintenance and alignment services. Expert technicians can ensure proper installation, alignment, and maintenance of rigid couplings, reducing the risk of unexpected failures.

Overall, rigid couplings are designed for reliability and longevity, and proper maintenance practices can further enhance their performance and lifespan. Regular inspections and alignment checks are vital for identifying and addressing potential issues before they escalate into costly problems.

rigid coupling

Can Rigid Couplings Be Used in Applications with Varying Operating Temperatures?

Rigid couplings are versatile mechanical components that can be used in a wide range of applications, including those with varying operating temperatures. However, the selection of the appropriate material for the rigid coupling is crucial to ensure its reliable performance under different temperature conditions.

Material Selection: The choice of material for the rigid coupling depends on the specific operating temperature range of the application. Common materials used in manufacturing rigid couplings include steel, stainless steel, and aluminum, among others. Each material has its own temperature limitations:

Steel: Rigid couplings made from steel are suitable for applications with moderate to high temperatures. Steel couplings can handle temperatures ranging from -40°C to around 300°C, depending on the specific grade of steel used.

Stainless Steel: Stainless steel rigid couplings offer higher corrosion resistance and can be used in applications with more demanding temperature environments. They can withstand temperatures from -80°C to approximately 400°C.

Aluminum: Aluminum rigid couplings are commonly used in applications with lower temperature requirements, typically ranging from -50°C to around 120°C.

Thermal Expansion: When selecting a rigid coupling for an application with varying temperatures, it is essential to consider thermal expansion. Different materials have different coefficients of thermal expansion, meaning they expand and contract at different rates as the temperature changes. If the operating temperature fluctuates significantly, the thermal expansion of the rigid coupling and the connected components must be carefully accounted for to avoid issues with misalignment or binding.

Extreme Temperature Environments: For applications with extremely high or low temperatures beyond the capabilities of traditional materials, specialized high-temperature alloys or composites may be required. These materials can withstand more extreme temperature conditions but may come with higher costs.

Lubrication: The choice of lubrication can also play a role in the suitability of rigid couplings for varying temperature applications. In high-temperature environments, consideration should be given to using high-temperature lubricants that can maintain their effectiveness and viscosity at elevated temperatures.

In conclusion, rigid couplings can indeed be used in applications with varying operating temperatures, but careful material selection, consideration of thermal expansion, and appropriate lubrication are essential to ensure reliable and efficient performance under changing temperature conditions.

rigid coupling

What is a Rigid Coupling and How Does it Work?

A rigid coupling is a type of mechanical coupling used to connect two shafts together at their ends to transmit torque and rotational motion without any flexibility or misalignment accommodation. Unlike flexible couplings, rigid couplings do not allow for angular, parallel, or axial misalignment between the shafts. The main purpose of a rigid coupling is to provide a strong and solid connection between two shafts, ensuring precise and synchronous power transmission between them.

Structure and Design:

Rigid couplings are typically made from durable materials such as steel, stainless steel, or aluminum, which can withstand high torque and load applications. The coupling consists of two halves, each with a cylindrical bore that fits tightly onto the respective shafts. The two halves are then fastened together using bolts or set screws to ensure a secure and rigid connection.

Working Principle:

The working principle of a rigid coupling is straightforward. When the two shafts are aligned precisely and the coupling is securely fastened, any torque applied to one shaft gets directly transferred to the other shaft. The rigid coupling essentially makes the two shafts act as one continuous shaft, allowing for synchronous rotation without any relative movement or play between them.


Rigid couplings are commonly used in applications where precise alignment and torque transmission are essential. Some common applications of rigid couplings include:

  • High-precision machinery and equipment
  • Robotics and automation systems
  • Precision motion control systems
  • Machine tools
  • Shaft-driven pumps and compressors


The key advantages of using rigid couplings include:

  • High Torque Transmission: Rigid couplings can handle high torque and power transmission without any loss due to flexibility.
  • Precision: They provide accurate and synchronous rotation between the shafts, making them suitable for precise applications.
  • Simple Design: Rigid couplings have a simple design with minimal moving parts, making them easy to install and maintain.
  • Cost-Effective: Compared to some other coupling types, rigid couplings are generally more cost-effective.


Despite their advantages, rigid couplings have certain limitations:

  • No Misalignment Compensation: Rigid couplings cannot accommodate any misalignment between the shafts, making precise alignment during installation crucial.
  • Transmits Vibrations: Since rigid couplings do not dampen vibrations, they can transmit vibrations and shocks from one shaft to the other.
  • Stress Concentration: In some applications, rigid couplings can create stress concentration at the ends of the shafts.

In summary, rigid couplings are ideal for applications that require precise alignment and high torque transmission. They offer a robust and straightforward solution for connecting shafts and ensuring synchronous power transmission without any flexibility or misalignment accommodation.

China Professional Rigid Coupling GM-50X50 Set Screw Series Coupling Winding Coupling  China Professional Rigid Coupling GM-50X50 Set Screw Series Coupling Winding Coupling
editor by CX 2023-11-16

rigid shaft coupling

As one of leading rigid shaft coupling manufacturers, suppliers and exporters of mechanical products, We offer rigid shaft coupling and many other products.

Please contact us for details.


Manufacturer supplier exporter of rigid shaft coupling

address:Tynystanova St, Bishkek,Kyrgyzstan

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