Product Description

CHINAMFG Rigid Shaft Coupling:

Design available: one-piece or two-piece or set screw
                            With keyway or without keyway

Material available: Aluminum
                 Carbon Steel Black Oxidized
                 Stainless Steel

Size available: 6mm to 50mm shaft fit
              1/4” to 2” shaft fit
Features:  Cost saving for economy
          High torque capacity
          Zero backlash
          Without the shaft damage and fretting
          Misalignment free

Clamp Style Rigid Couplings for applications where alignment is critical, no backlash is desired, and flexibility is not required. The one-piece rigid coupling wraps around the shaft,  providing high torsional holding power without the shaft damage and fretting.  The two-piece rigid coupling has the additional benefit of allowing for disassembly and maintenance without removal of other components.

Black Oxide Steel Stainless Steel Inner Dia mm Outer Dia mm Length mm Clamp Screw Weight g
RSC1-6-ST RSC1-6-SS 6 18 30 M 3 x 8 47
RSC1-8-ST RSC1-8-SS 8 24 35 M 3 x 10 102
RSC1-10-ST RSC1-10-SS 10 29 45 M 4 x 12 185
RSC1-12-ST RSC1-12-SS 12 29 45 M 4 x 12 180
RSC1-14-ST RSC1-14-SS 14 34 50 M 5 x 16 272
RSC1-15-ST RSC1-15-SS 15 34 50 M 5 x 16 266
RSC1-16-ST RSC1-16-SS 16 34 50 M 5 x 16 261
RSC1-20-ST RSC1-20-SS 20 42 65 M 6 x 16 518
RSC1-25-ST RSC1-25-SS 25 45 75 M 6 x 16 623
RSC1-30-ST RSC1-30-SS 30 53 83 M 6 x 18 920
RSC1-35-ST RSC1-35-SS 35 67 95 M 8 x 25 1880
RSC1-40-ST RSC1-40-SS 40 77 108 M 8 x 25 2710
RSC1-50-ST RSC1-50-SS 50 85 124 M 10 x 25 3520


Black Oxide Steel Stainless Steel Inner Dia mm Outer Dia mm Length mm Clamp Screw Weight g
RSC2-6-ST RSC2-6-SS 6 18 30 M 3 x 8 47
RSC2-8-ST RSC2-8-SS 8 24 35 M 3 x 10 102
RSC2-10-ST RSC2-10-SS 10 29 45 M 4 x 12 185
RSC2-12-ST RSC2-12-SS 12 29 45 M 4 x 12 180
RSC2-14-ST RSC2-14-SS 14 34 50 M 5 x 16 272
RSC2-15-ST RSC2-15-SS 15 34 50 M 5 x 16 266
RSC2-16-ST RSC2-16-SS 16 34 50 M 5 x 16 261
RSC2-20-ST RSC2-20-SS 20 42 65 M 6 x 16 518
RSC2-25-ST RSC2-25-SS 25 45 75 M 6 x 16 623
RSC2-30-ST RSC2-30-SS 30 53 83 M 6 x 18 920
RSC2-35-ST RSC2-35-SS 35 67 95 M 8 x 25 1880
RSC2-40-ST RSC2-40-SS 40 77 108 M 8 x 25 2710
RSC2-50-ST RSC2-50-SS 50 85 124 M 10 x 25 3520

rigid coupling

Can Rigid Couplings Handle Misalignment Between Shafts?

Rigid couplings are not designed to handle misalignment between shafts. Unlike flexible couplings that can accommodate slight misalignment through their bending or elastic properties, rigid couplings are intended to provide a fixed and immovable connection between two shafts. As a result, any misalignment between the shafts can lead to increased stress and uneven loading on connected components.

It is essential to ensure precise alignment when using rigid couplings to avoid premature wear and failure of the system. The shafts must be perfectly aligned in both the axial and angular directions before installing the rigid coupling. Proper alignment helps distribute the load evenly and reduces stress concentration on specific areas, such as bearings and keyways.

If a system requires some level of misalignment compensation due to factors like thermal expansion or slight shaft deflection, a flexible coupling should be considered instead. Flexible couplings can tolerate small degrees of angular and axial misalignment while still transmitting torque efficiently and protecting the connected equipment from excessive stress and wear.

In summary, rigid couplings are best suited for applications where precise shaft alignment can be achieved and maintained, while flexible couplings are more appropriate for systems with potential misalignment or other dynamic factors that require some degree of flexibility.

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

Limitations and Disadvantages of Using Rigid Couplings:

Rigid couplings offer several advantages in providing a strong and direct connection between shafts, but they also have certain limitations and disadvantages that should be considered in certain applications:

  • No Misalignment Compensation: Rigid couplings are designed to provide a fixed connection with no allowance for misalignment between shafts. As a result, any misalignment, even if slight, can lead to increased stress on connected components and cause premature wear or failure.
  • Transmit Shock and Vibration: Rigid couplings do not have any damping or vibration-absorbing properties, which means they can transmit shock and vibration directly from one shaft to another. In high-speed or heavy-duty applications, this can lead to increased wear on bearings and other components.
  • No Torque Compensation: Unlike flexible couplings, rigid couplings cannot compensate for torque fluctuations or angular displacement between shafts. This lack of flexibility may not be suitable for systems with varying loads or torque requirements.
  • Higher Stress Concentration: Rigid couplings can create higher stress concentration at the points of connection due to their inflexibility. This can be a concern in applications with high torque or when using materials with lower fatigue strength.
  • More Challenging Installation: Rigid couplings require precise alignment during installation, which can be more challenging and time-consuming compared to flexible couplings that can tolerate some misalignment.
  • Increased Wear: The absence of misalignment compensation and vibration absorption can lead to increased wear on connected components, such as bearings, shafts, and seals.
  • Not Suitable for High Misalignment: While some rigid couplings have limited ability to accommodate minor misalignment, they are not suitable for applications with significant misalignment, which could lead to premature failure.

Despite these limitations, rigid couplings are still widely used in many applications where precise alignment and a strong, permanent connection are required. However, in systems with significant misalignment, vibration, or shock loads, flexible couplings may be a more suitable choice to protect the connected components and improve overall system performance and longevity.

China Hot selling One Piece Rigid Coupling Rsc1-30-St (Ruland MCLX-30-30-F) , Without Keyway  China Hot selling One Piece Rigid Coupling Rsc1-30-St (Ruland MCLX-30-30-F) , Without Keyway
editor by CX 2023-11-16