- Resistant to H25 and CO2.
- Remember, always consult your owner's manual or a professional mechanic before performing any engine modifications or replacements. Improper installation or maintenance can lead to engine damage and other safety issues.
Why are sealed bearings favored over the unsealed alternative? Why ought sealed ball bearings be preferred to unsealed ones? What advantages can sealed ball bearings offer?
Purpose of oil seal
HIGH-QUALITY INDUSTRIAL OIL SEALS
Oil seals, also known as rotary shaft seals or lip seals, are a specific type of gasket designed to prevent the leakage of oil or other fluids in rotating shafts.
These types are made with a metal outer case and a PTFE lip. They are suitable for a wide range of temperatures from -90 °C to +260 °C.These lip seals can also be used for higher pressures of up to 10 bar (special types up to 25 bar) and rotational speeds of up to 40-45 m/s. Certain grades of PTFE are suitable for use in pharmaceutical and food applications. One important point is that PTFE lip seals do require a shaft with a harder, smoother finish.
An overview of the different standard types of oil seals and their main characteristics is shown below.
However, rubber-cased seals do have limitations. For example, during installation, shear stresses can build up between the seal and housing wall, causing the seal to release itself.

rubber sheet white gasket. This involves placing the rubber material into a mold and applying heat and pressure to shape it into the desired form. The resulting gasket is then trimmed to the correct dimensions and surface finished to ensure a proper seal.
For quality gaskets, Victor Reinz is the place to be. The German company invented the head gasket, but today it also specialises in other types of seals, including oil seals.
The simplest way is to know either the preferred manufacturers part number, the overall sizes of shaft diameter, housing diameter and bore depth, or use our brochure to establish the M Barnwell Services ordering reference. Many of the old traditional names of seal manufacturers have either changed or disappeared in this age of “acquisitions”. If no longer available, we will advise you and offer a suitable alternative seal, from stock whenever possible. If your concern is getting the right seals for the job, you will need to know something about the application as well as the overall sizes. If you have any doubts – contact us, we will help in your seal selection.
As type A with dust lip
Shaft seals, dirt seals, grease seals, lip seals, and many other names are only a few of the many names given to oil seals. They are simple components used in rotary shaft machinery to keep oil from leaking and impurities like dust, dirt, and water out. However, an oil seal’s most crucial role is to safeguard all ball, sleeve, and roller bearing types found in rotating shafts. Additionally, the seals stop blending two fluids that shouldn’t mix, such as water and oil.
Figure 4 shows the features of a JTEKT oil seal.

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