FPM

As type B with dust lip

a) The shaft on which the oil seal is to be mounted should be ground with the surface finish or surface roughness between 0.2 to 0.8 Microns. It is best for the shaft to be hardened atleast to 40 – 45 HRc in order to prevent groove formation on the shaft due to the pressure exerted by the spring.

As the pressure increases, the radial load and the friction of the sealing lip increase in contact with the shaft. As with temperature, each oil seal has a recommended pressure for optimum performance. Excessive pressure causes the seals to wear more quickly and consequently have a shorter life.

Metal O.D. wall
(with a reinforcing inner metal case)

Name Type
(type code) Shape Features

Regular inspection and maintenance of valve cover gaskets, head gaskets, and spark plugs are essential to identify signs of wear, damage, or deterioration. Proper replacement of worn or damaged components is crucial for maintaining the efficiency and reliability of the engine. Adhering to recommended service intervals and using high-quality replacement components are essential for optimizing the performance and longevity of the engine's critical components.

Oil seals are vital to the daily operation of most factories and a wide range of industrial and commercial equipment. They are available in imperial and metric dimensions for both single- and double-lip design. Motors, Mechanical Hydraulic systems, pistons, and pumps utilize oil seals to protect internal components. Depending on the application, there are various material, size, and configuration options to best fit your needs. Learn more about oil seals, their composition, and the wide range of advantages they offer for your equipment.

For a more detailed discussion of seal characteristics, please see the following:
Seal characteristics

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.

In conclusion, wheel hub oil seals and steering oil seals are essential components in automotive systems, contributing to the efficiency, safety, and reliability of the vehicle. Understanding the significance of these seals and their proper maintenance is crucial for optimizing the performance and longevity of the wheel hubs and steering mechanisms.

Always start by making sure the oil seal is facing the right direction. The oil seal must be positioned with its spring to the side of the medium to be sealed. The oil seal must then be pressed into the bore. It must fit tightly (H8 in the groove is recommended). Use appropriate tools for this, such as an impact socket set, to ensure that the force is applied evenly during pressing. The oil seal must never be hammered into the bore with brute force, but eased in.

For more information on the characteristics of Oil Seals click on some of the links below:

Loosen all the sump nuts or bolts with a socket, long extension bar and ratchet handle.

What is Oil Seal

Nitrile rubber (NBR)