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There are several indicators that can suggest the need for hub seal maintenance or replacement. One of the most common signs is leaking grease or oil around the wheel hub area. Drivers may also notice unusual noises, such as grinding or humming sounds, which can be indicative of failing bearings. Furthermore, if the vehicle exhibits a vibration or wobbling sensation while driving, it is essential to inspect the hub assembly and the seals for any signs of wear.

2. Durability They are designed to endure extreme conditions, including high temperatures and corrosive chemicals. The materials used in high pressure rotary shaft seals are often resistant to wear, ensuring a long operational life and reducing the need for frequent replacements.

Conclusion

The designation 20x35x7 refers to the dimensions of the oil seal. The numbers represent the inner diameter (20 mm), outer diameter (35 mm), and the thickness (7 mm) of the seal. The design of an oil seal is critical, as it must fit precisely to ensure a proper seal and prevent the ingress of dirt, dust, or moisture. The choice of material used for these seals often includes rubber compounds that enhance flexibility and resilience. Common materials include nitrile rubber (NBR), fluorocarbon rubber (FKM), and silicone, each chosen based on the specific application and operating conditions.