To overcome these obstacles, engineers employ a range of strategies
The gasket set includes curved half seals that fit to the crankshaft, not the sump flange. Repeat the process of installing oil seals for any other locations where they are required. Be sure to follow the same steps for each installation to ensure a leak-free performance.
- Type B: An outer metal case generally used on shafts with diameters under 150mm and bore housing materials made of steel or cast iron. It provides a firm and accurate seal in the housing but may limit the static sealing on the outer diameter (O.D.).
Nitrile (NBR) Oil Seals
- Another important consideration when selecting a hub oil seal is its compatibility with the fluid being sealed
Fluid Types - Various oil seals are able to withstand interactions with oils, fuels, grease, water and more. Knowing what type of fluid the rotary shaft seal will be in constant contact with will ensure the longevity of the seal and surrounding components.
- In recent years, manufacturers have also introduced double platinum and double iridium spark plugs. These plugs feature two layers of platinum or iridium, providing even greater durability and performance. While these plugs are more expensive than their single-layer counterparts, they are often worth the investment for drivers looking to maximize their engine's performance.
Before fitting the oil seal, it is essential to check that the oil seal, shaft and bore are clean and undamaged. The surfaces the oil seal will come into contact with must be free of sharp points or burrs. The sealing lip is fragile, so even minimal damage can cause a leak. It is also important that the shaft and bore are correctly finished.


Figure 4: Shaft end chamfer
Because of the higher temperature resistance of FKM, this material is also chosen for applications where higher speeds play a role, which raise the temperature at the sealing lip considerably. Usually, using FKM will result in a longer life than using NBR. This compensates the higher price of FKM compared to NBR, as an FKM does not have to be replaced as frequently. The low temperature resistance of standard FKM is limited to -15 ˚C.
No code: without minor lip
The group of oil seals used in dynamic applications include radial shaft seals that seal a rotating shaft around its circumference. They are also known as lip seals, but in this blog we will use the term oil seals.
Silicone rubber (VMQ)
Just like pressure. The temperature capability of the oil seal shouldn’t be lesser than the temperature of the application. This is because any significant increase or even decrease in the temperature will affect the functionality of the oil seal. PTFE seals have the highest temperature capability, making them useful for applications that demand harsh weather and elements.
Installation of the oil seal