ironing board cloth cover_universal ironing board cover

A shaft oil seal, also known as a lip seal, is typically made of rubber or other flexible materials, with a lip that seals against the rotating shaft. It is designed to effectively seal the interface between the shaft and the housing, preventing the entry of dirt, dust, water, and other contaminants that could potentially damage the machinery.

Oil seals are used in many areas around the car.
Figure 6 shows the places where each seal type is used.

If you are installing an o-ring to serve as a backup, make sure you put it on the low-pressure side of the system. This will make the high-pressure side push the o-ring against the backup.