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How to lubricate custom coupling?
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How to lubricate custom coupling?

Views:0     Author:Site Editor     Publish Time: 2021-04-15      Origin:Site

Custom coupling is used to connect two shafts of different machines. Custom coupling is a mechanical part that allows the machine to rotate together to transmit torque, which is a more critical part. So now we briefly introduce to you about the importance of lubricating flexible coupling so that its performance becomes more excellent.


  • Is it important to lubricate custom coupling?

  • How to lubricate custom coupling?

  • What can we do when custom coupling cannot be lubricated?


Is it important to lubricate custom coupling?

Yes! When the lubrication effect of the custom coupling and the bearing bush fails to meet the requirements, a variety of failures will appear. Certain types of bearings that are really difficult to buy have no spare parts and have to be repaired after failure, especially imported bearings. Bearings with minor damage, such as slight water rust during inventory. Slight fretting abrasion during transportation will cause dry friction of the part between the shaft and the bearing bush due to direct contact if the oil pressure is low. At this time, the shaft surface is blue. If the lubricating oil fails or the pressure cannot be built up, the moving surface will lose the protection of the oil film and directly contact for dry friction. When the temperature rises, the alloy layer of the bearing bush will melt, and the bush will be held when the machine is stopped in time. Failure to stop the machine in time will cause more serious damage to the parts.

Custom flexible couplings are used to protect equipment from pressure and wear, reducing downtime and costs. Although these components of custom couplings are usually smaller than the connected equipment, they play a major role in equipment reliability. Appropriate selection, installation and maintenance of custom couplings can help greatly extend the service life of the equipment. These custom couplings consist of metal surfaces that slide and rotate towards each other, and require lubrication to prevent wear. Because the small contact area bears high loads, grease containing high-viscosity oil is required.

The grease selected for the custom coupling must also be carefully formulated to withstand centrifugal force. The centrifugal force may vary greatly due to the diameter and rotation speed of different custom couplings, and may adversely affect the performance of the grease.

In fact, the most versatile greases do not consider the centrifugal force of the custom coupling, which usually contain thickeners with a higher mass density than oil. If such thickeners are used in a rotating custom coupling, it will push the lubricating oil towards the center of the custom coupling, making it ineffective. Therefore, a suitable grease should be selected for the custom coupling.


How to lubricate custom coupling?

The lubrication of custom coupling uses high-quality grease, which is compatible with custom coupling in the same life span. And the custom coupling of some commercial transportation vehicles, especially the existing old trucks, are still repairable.

To protect the custom coupling from wear, the operator must:

  • According to the type, speed and size of the custom coupling, select the appropriate grease.

  • Install a properly selected custom coupling within the allowable deviation range, larger torque and continuous torque conditions.

  • Regularly check the equipment for leakage of lubricating oil seals, keyways, packing plugs and flange couplings; missing or loose bolts, and vibration, and regularly readjust the equipment.

  • Determine the appropriate amount of lubrication and the frequency of equipment inspection.

  • Finally, when relubricating the custom shaft coupling, the operator should completely disassemble the custom coupling regularly for visual inspection and thorough cleaning

Some people use 2# extreme pressure lithium complex grease, which is based on two points. First, its fluidity is better, so that it can easily reach the lubrication part. Second, the grease has good extreme pressure resistance and is suitable for working conditions of custom coupling.


What can we do when custom coupling cannot be lubricated?

Custom coupling is a transmission output shaft and final drive input shaft in different straight lines. Even if the angle and distance between the two shafts change, power can be transmitted.

In the maintenance of the custom coupling, it is very important to ensure the lubrication of the custom coupling that the amount of oil injection must be reasonable within the possible range. The fueling hole is blocked, the grease nipple is smashed into the hexagonal deformation or the grease nipple is rusted, the oil circuit will be blocked so that the grease nipple should be replaced in time. During the replacement process, keep the area around the interface clean. It is necessary to prevent the mixing of impurities, dust and sand in the machine.

The intake pressure of the grease gun is insufficient. The high-pressure oil injector is an oil injection device powered by compressed air. The function of pump is to produce high pressure by oil, and then the high pressure is used for oil injection. Pay attention to starting the air compressor before using, and prepare compressed air of about 0.6 MPa. The working principle of refilling grease which is not suitable for lubricating grease is that the thickening agent keeps the oil in the position where needs lubrication. When there is a load, the thickening agent can release the oil to play a lubricating effect.

The custom coupling is a special coupling. Due to its structural characteristics, the driving shaft and the driven shaft are not on the same axis. When there is an angle between the axes, the connected two shafts can rotate continuously, and reliably transmit torque and movement.


Learn more something about custom couplings can know the importance of lubricating custom couplings and how to lubricate 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 shaft couplings and if you want to have other type shaft coupling, you can contact us.




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