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- Oil seals are commonly used in engines, gearboxes, and other machinery to keep oil from leaking out and contaminating surrounding parts. Without a reliable oil seal like the National Skeleton TC Oil Seal, the performance and longevity of these mechanical systems would be compromised.
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Properly installed, an oil seal will help keep machinery in perfect working order. Its primary functions include retaining or separating fluids, maintaining a bearing’s lubricity, preventing seal leakage, and preventing the entry of foreign contaminants. Other benefits of Emerson Bearing’s oil seals include:
- Applications of Rectangular Rubber Gaskets
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Rotary Wheel Of Auto Parts
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Pressure - Many oil seals can only withstand low-pressure applications, so understanding the compression set of your components is key.
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Operating temperatures for engine oil seals (see Fig. 14.11 and cross-section of lip seal with garter spring in Fig. 14.22) vary widely, depending on engine design and location within the engine. Typically, the rear crankshaft seal is subjected to much higher temperatures than the front seal. Oil sump temperatures vary considerably, depending on provisions for oil cooling. This allows use of hydrogenated nitrile (HNBR), silicone, or acrylic elastomers for some seals in relatively low-temperature environments (120–140°C or 250–284°F). Standard fluoroelastomers (FKM), bisphenol-cured VDF/HFP/TFE terpolymers with 68–69% fluorine content, perform well in oil service up to about 160°C (320°F). More resistant fluoroelastomers are necessary for reliable long-term performance in more severe environments.
- High Pressure Oil Seals A Vital Component in Industrial Machinery
The interaction of the integrated seals with the shaft follows the dynamics of the PTFE seals. Often an additional dust seal (rubber lip or felt strip) provides an effective barrier against contaminating particles.

