Chain couplings are used for transmitting power between two shafts, driven and driving one. They are installed off the end of a motor or gearbox and connect to another machine/ equipment for efficient torque transmission. So, if your facility uses chain couplings, it is paramount to ensure you understand different parts and always have the right accessories for prompt maintenance. In this post, we will tell you about the main accessories to know about.

How Does a Chain Coupling Work?

A chain coupling is a mechanical device designed with a double-strand roller chain plus two modified sprockets. Although simple and small, the design is very effective in transmitting torque from one shaft to another. Like other types of mechanical devices, chain couplings are also subject to breakdowns, requiring the replacement of the entire unit or parts. Some causes of chain coupling damage include:

• Excess loads on the shafts.
• Intensive shaft misalignment.
• Poor or lack of lubrication.
• Running faster than the recommended speed.

The Main Coupling Accessories for Your Chain Coupling

Here are the main categories of chain coupling accessories that you should know about, have in your maintenance toolbox, or purchase to fix issues.

• Coupling cover

Chain coupling covers are crucial because of their safety benefits. Instead of leaving the coupling chain and sprocket assembly to operate while exposed, the cover keeps them concealed, which helps to extend their life. Again, it reduces the risk of injuries that can result from the chain grabbing the clothing or body part. In addition, the cover holds the lubricants and oils for the coupling to increase their operating efficiency.

• Sprockets

Sprockets are sturdy wheels designed with teeth that lock into the chain. As the driving shaft rotates, the sprocket teeth grab the chain and move together to transmit torque to the second shaft. There are different types of chain coupling sprockets, from double pitch sprockets to stainless steel roller sprockets. Again, they can be designed with different materials, from aluminum to stainless steel. Depending on the nature of the chain coupling, you might also need to consider plastic sprockets.

• Coupling Chain

As we indicated in the definition, the assembly of a chain coupling should have the right chain that moves together with the sprocket to transfer torque. Again, the types of chain you select depend on the nature of your application, environment, and materials being handled. Although metal chains are the most common, you can also get Acetal plastic-type that does not require lubrication. Although plastic chains transfer less power, they are recommended when lubricants, such as greases, are considered contaminants.

These are only a few of the main accessories, but you might need more depending on your equipment. For example, if the chain coupling in your system uses idler sprockets, you will need to also add bearings to the list of your list of accessories. Others include cover coupling cover seals and a number of set screws.

To make your shaft coupling to work effectively, this post has highlighted the main accessories you should know and check regularly. In addition, you need to ensure that the entire power transmission system, from the motor to the shaft and material handling, is all in top condition. Therefore, it will be good to adopt proactive maintenance and automation so that issues are noted early enough and rectified on time.