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4. SHAFT SPEED: As different shafts move at different speeds you need to consider the runout, the housing bore, and oil type being sealed. Ensure you select a seal that will not suffer from abrasions or spiralling.

rubber sheet white gasket. This involves placing the rubber material into a mold and applying heat and pressure to shape it into the desired form. The resulting gasket is then trimmed to the correct dimensions and surface finished to ensure a proper seal.
Lubricant can be retained in the space between the main lip and the minor lip.
Among the most common causes of oil seal failure are:
FPM
The hydrogenated butyronitrile rubber has been
U-Shaped Silicone Gasket: Applications and Advantages
Significance of Valve Cover Gaskets and Head Gaskets
ERIKS

FKM or FPM, which is in well-known brand Viton™, can withstand higher liquid temperatures of up to 180 ˚C. FKM is highly resistant to strong acids and bases, as well as to synthetic oils and greases. Glycol-based oil and grease, however, can also damage FKM.
Cracks or swelling