The main role of the end cap:
1. Axial positioning of the outer ring of the bearing.
2. dustproof and sealed, in addition to its own dustproof and sealed, it often cooperates with the seal to achieve the seal.
Bearings with end caps inside the machine, lubricated with pressure oil, sliding bearings generally do not require end caps. Rolling bearings on the outside of the machine are generally equipped with upper-end caps. The main purpose is to prevent grease loss and prevent dust and impurities from entering the bearing. When necessary, without prejudice to the structure and running performance of the machine, it is fine to not cover the end cover in a short time, but it should be installed during normal operation to prevent grease loss and dust impurities from entering and eliminating people. The hidden danger of injury.