Introduction
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2025-08-14 08:19
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Conclusion
When the bore and shaft centers are misaligned, seal life will be shortened because the wear will be concentrated on one side of the sealing lip.
EPDM
If necessary, lever it gently with a broad screwdriver blade, but take care not to bend the flange or damage the head.
Function of hydrodynamic ribs
These are comparable to type R and RST, except the outer case does not have a metal reinforcement ring. To compensate, the outside is not made of normal rubber, but a hard, heavy-duty rubber fabric. The advantage is that these types can be made in a split version. They are almost always produced to order, and made of NBR or FKM.