Sealed bearings are preferred over the unsealed alternative, but why is that? Why should sealed ball bearings be considered over unsealed bearings? What are the benefits of sealed ball bearings? Worry-free Lubrication No Contact Self-Contained Worry-Free Lubrication Unsealed ball bearings require regular lubrication. If lubrication is not completed regularly, you are faced with the issue of failure. Sealed bearings, however, do not need lubrication. This, in turn, eliminates the process of lubrication and thus results in saving time on labor. This is especially ideal when the bearings are located in hard-to-reach areas like in [...]