The quality of a bearing arrangement is viitally influenced by the components – shaft, housing, seal – that are directly flanked to the bearing.
Seals play a vital role in protecting bearings against contamination.
If inadequate seals are used, contaminants can penetrate the bearing or an unacceptably large quantity of lubricant may escape from the bearing.
Solid contaminants lead to wear and/or fatigue of the raceways and rolling elements.
Bearings that are contaminated or running dry will fail long before they reach their fatigue rating life. Therefore, the bearing design also forms the basis for the ideal application-specific seal regarding the service life of the bearings.
Sealing rings have a single lip and are made of synthetic NBR elastomer.
They have an external steel reinforcement for stiffening purposes.