Selecting the correct bearing seal
This expert advice will help simplify your application-specific decisions about external seal types.
The primary functions of a bearing seal are to keep lubricant in the bearing and bearing chamber contaminants out.
Some seals are integral to the bearing; others aren’t. The focus here is on what to consider when selecting external bearing seals. Key factors in making the right choice for an application typically include:
- Bearing type (rolling or sleeve)
- Lubricant (oil or grease)
- Seal friction and consequent heating
- Shaft surface speed and finish
- Physical space available
To select the appropriate seal for an application, match the relevant factors from the above list with the characteristics of the following external seal types.