- In conclusion, hub oil seals are a vital component in maintaining the performance and longevity of machinery. Their ability to create a tight seal, adapt to changing conditions, and ensure compatibility with various fluids make them an indispensable tool in a wide range of industrial applications. As technology continues to advance, we can expect to see further improvements in the design and performance of these crucial devices.
Figure 6: Oil seals for cars
internal, external and axial orientation
The cost of new spark plugs can range from as low as $2 to as high as $20 per plug. Cheaper spark plugs are often made of basic materials and may not last as long as more expensive options. On the other hand, high-quality spark plugs are made of premium materials such as platinum or iridium, which can resist wear and corrosion better than cheaper materials.
All are fitted with a spring to preload the sealing lip. All these types are for non-pressurised or low-pressure applications up to 0.5 bar for diameters of a limited size. For diameter of 500 mm or more, the maximum pressure is 0.1 bar. For higher pressures, special types or PTFE lip seals can be used.
Shaft Speed


When included, the garter spring applies pressure to the sealing lip against the shaft, ensuring a tight seal. The choice of material, like that of the case, largely depends on the environment of use.
Maintenance and Replacement
What are Oil Seals and how do they work?
Like any element of the engine, oil seals are subject to wear. Over time they can lead to possible leaks of lubricating liquid.
These oil seals are the best for applications involving high temperatures. It’s suitable for temperatures between -4 degrees Fahrenheit and 392 degrees Fahrenheit. Also, it’s highly resistant to acids, dissolvent materials, and other chemicals. Viton (FKM/FPM) oil seals can run at a maximum speed of 38 m/s.
Figure 4 shows the features of a JTEKT oil seal.