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What are the types of custom couplings
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What are the types of custom couplings

Views:0     Author:Site Editor     Publish Time: 2021-04-09      Origin:Site

As shaft couplings have different types, custom couplings also have different size according to your working conditions. Although the standard type shaft coupling can meet almost working conditions and sizes, custom couplings can also be designed for your special use, which is very popular in daily life.


  • What are the types of custom couplings?

  • What are the differences between rigid couplings and flexible couplings?

  • How to choose a right custom coupling?


What are the types of custom couplings?

Custom couplings can be divided into two categories: rigid couplings and flexible couplings.

Rigid couplings do not have the ability to buffer and the ability to compensate for the relative displacement of the two axes, which requires strict alignment of the two axes. However, rigid coupling has simple structure, low manufacturing cost, convenient assembly and disassembly and maintenance, and can ensure that the two axes have the neutrality of the transmission is greater. Rigid couplings can be used in flange couplings, sleeve couplings and clamp couplings.

Flexible couplings can be further divided into flexible couplings without elastic elements and flexible couplings with elastic elements. The former type only has the ability to compensate the relative displacement of the two axes, but it cannot buffer and dampen vibrations, which is commonly used in slider couplings, gear couplings, universal couplings and chain couplings.

Because the latter type contains elastic elements, in addition to the ability to compensate for the relative displacement of the two axes, flexible couplings with elastic elements also has the ability of buffering and dampening.

However, it is worse than the flexible coupling without elastic elements for the torque is limited by the strength of the flexible element. Flexible couplings with elastic elements commonly are the part of elastic sleeve pin couplings, elastic pin couplings, plum-shaped couplings, tire couplings, serpentine spring couplings and reed couplings.


What are the differences between rigid couplings and flexible couplings?

Rigid shaft coupling cannot compensate for the axial displacement and radial displacement between the connecting transmission shafts. The rigid coupling has a simple structure and a low price, which is suitable for two shafts with good concentricity.

Flexible shaft coupling can compensate for the axial displacement and radial displacement between the connecting shafts. The structure of the flexible coupling is relatively complicated and the price is relatively high. It is suitable for the situation where the concentricity of the two shafts is not very good, and is suitable for the situation with torsional vibration to reduce vibration.

The main difference between rigid couplings and flexible couplings is the connection they provide. Rigid coupling provides a rigid connection, that is, two shafts are firmly connected, and the coupling can transmit torque smoothly in the entire system. A flexible coupling can form a flexible connection, and the components may lose some torque through interaction.

  • Alignment Requirements: Flexible couplings can handle slightly misaligned shafts. Rigid couplings are stiff and can’t tolerate any misalignment. This applies to both shafts that are physically misaligned at rest and parts that may cause misalignment during operation due to thermal changes.

  • Backlash: Rigid couplings, especially newer models of aluminum rigid couplings, can significantly reduce backlash to at-zero or near-zero levels. Flexible couplings don’t offer the same protection.

  • Maintenance Requirements: Because rigid couplings are stiff, they do not absorb vibrations, which can lead to early wear on parts that aren’t properly aligned. Operators should routinely check rigid couplings for wear and alignment, and they should also routinely apply lubricant. Flexible couplings can handle vibration and shock without adverse wear.

  • Complexity: Flexible couplings often have more components and are more complex. This can make operation and maintenance more complicated. Rigid couplings are simpler and more straightforward.

  • Applications: Flexible couplings can be used in servos with low or moderate torque levels and the potential for shaft misalignment. This includes applications such as machining tools, semiconductor manufacturing, and packaging equipment. Rigid couplings work best for high-torque requirements, shaft support applications, and push-pull use cases.

  • Cost: Rigid couplings are more affordable than flexible couplings, which tend to have a high cost.


How to choose a right custom coupling?

According to the size of the transferred load, the speed of the shaft, and the installation accuracy of the two parts to be connected, choose a suitable custom coupling, together with referring to the characteristics of various couplings. The following points can be considered when selecting:

The size and nature of the torque to be transmitted and the requirements for the cushioning function. For example, for high-power and heavy-duty transmissions, gear couplings can be selected. For transmissions that require severe impact loads or to eliminate shaft torsional vibration, tire couplings and other couplings with high elasticity can be selected.

The working speed of the custom coupling and the centrifugal force. For high-speed transmission shafts, custom couplings with high balance accuracy, such as diaphragm couplings should be selected, rather than slider couplings which has eccentricity.

The magnitude and direction of the relative displacement of the two axes. When it is difficult to maintain strict and precise alignment of the two shafts after installation and adjustment, or when the two shafts will have a large additional relative displacement during the working process, a flexible coupling should be used. For example, when the radial displacement is large, the slider coupling can be used. The universal coupling can be used for the connection of large angular displacement or intersecting two shafts.

The reliability and working environment of the custom coupling. Custom coupling usually made of metal elements that do not require lubrication are more reliable. The performance of custom coupling is easily affected by the perfect degree of lubrication and may pollute the environment. Custom coupling containing non-metallic components such as rubber are sensitive to temperature, corrosive media and strong light, and are prone to aging. The surrounding working environment of custom coupling is more complicated. Temperature, humidity, water, steam, dust, sand, oil, acid, alkali, corrosive media, salt water, and radiation are all should be taken into consideration when choosing a custom coupling. For the working quality of high or low temperature, oil, acid and alkali medium, it is not suitable to choose the flexible coupling with the general rubber as the elastic element material.

The manufacturing, installation, maintenance and cost of the custom coupling. Under the premise of meeting the convenience performance, custom coupling that are easy to install and unload, simple to maintain, and low-cost should be selected. For example, the rigid coupling has simple structure and convenient assembly and disassembly, and can be used for low-speed, high-rigidity drive shafts. General non-metal element couplings are widely used in general medium and small power transmissions due to their good comprehensive capabilities.


Learn more something about custom couplings can know the types of custom couplings and how to choose custom couplings. If you want to buy good custom couplings with reasonable price, FOSHAN HOUZHE TRANSMISSION EQUIPMENT CO., LTD. is your best choice. Whether from quality or price, or delivery time, we can help customers to open up a further and larger market. We have all types of different custom couplings and if you want to have other type shaft coupling, you can contact us.




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