The choice of the right elastomer
Next points are important
- Under lip temperature caused by friction
- Shaft speed
- Temperature of the medium
- Chemical influence of the medium
- Pressure on the seal
The following table may help to determine the peripheral speed at a given shaft diameter and rotational speed
Example: the peripheral speed of a shaft of 40 mm diameter with a speed of 3000 revolutions per minute is 6.5 metres per second.
Shaft speeds which may be permitted, related to the rubber material in the case of non-pressure conditions (with good lubricating mineral oil and a good flow of lubricant), is shown in the next figure.
* = Oil will convey the heat better than grease.
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