• High eccentricity-following lip shape
(6) Note that there should be a certain amount of lubricating oil on the lip of the oil seal.
With the help of tips and information from our suppliers, our specialists will be happy to explain how to install oil seals. Please read the instructions carefully before installation.
R
Nitrile
A standard oil seal consists of an outer circular metal disk with an inner flexible rubber which is affixed to the metal during vulcanization. The bonded seal has no loose parts to allow leakage of oil or ingress of any contaminants. This kind of seal is more accurate, and can easily be fitted into a smaller space. An example is shown in Figure 2.9.
How to Choose the Right Oil Seal

Auto Parts Spark Plug: Importance and Selection
Conventional oil seals are the traditional seals, which can be recognised by a spring on the inside. These oil seals are made of a metal housing that contains a rubber seal. This part is often made of elastomer and comes into contact with the surface of the rotating shaft.
advantage:
Oil Seals without Spring
(This facilitates mounting.)