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Hydraulic oils differ in their chemical composition and viscosity substantially. Their influence on the wear of rod seals is neither fully understood nor can be predicted precisely. The primary objective of this study was to evaluate the influence of various oils and their wetting properties on the wear of rod seals. In an empirical study, the wear of 30 commercially available polyurethane U‐cups...
The rod seal of a hydraulic cylinder is a crucial component as it controls leakage directly into the environment. Several testing methods can be used to detect a decreasing sealing ability, even before measured leakage occurs. This feature article describes the results of leakage measurements, pumping rate measurements and film thickness measurements on the rod surface. The differences between the...
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