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# What are self-lubricating bearings?

What are self-lubricating bearings?

As the name suggests, self-lubricating bearings provide their own lubrication during operation without the use of grease or oil-based lubricants. Therefore, self-lubricating bearings also do not require lubrication or grease, so they are also called maintenance-free or grease-free bearings. An important difference is that self-lubricating bearings are not pre-greased bearings, but are called pre-lubricated bearings. Pre-lubricated bearings require relubrication at certain times during their service life. What is the importance of self-lubricating bearings in the aerospace industry?

The aerospace industry requires low-friction bearings with excellent wear resistance to help reduce labor costs. Since many areas of the aircraft are difficult to maintain, they benefit from components with a long service life, namely self-lubricating bearings.
Self-lubricating bearings are a type of bearing that does not require any external lubrication and is maintenance-free or preventative maintenance. This type of bearing is made up of two metal surfaces that are separated by a layer of oil. When the two surfaces move against each other, the oil is forced out and provides a film of lubrication between the two surfaces. This helps to reduce friction and wear between the mating surface.
Self-lubricating bearings eliminate maintenance requirements, reduce labor costs, and extend service life in aerospace applications.


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