J: Additional code is added here as an identifier when two or more seals have exactly the same type codes and dimensional numbers.
insufficient lubrication
Most ERIKS oil seals, such as the types M, MST, R and RST, are made of NBR as standard.
Shaft Hardness
Many oil seals are capable of resisting contact with grease, fuel, water, and other elements. Knowing what type of fluid the seal will interact with will help you choose the right oil seal that can withstand those types of fluids.

Selecting Quality Silicone and Rubber Gaskets
Oil Seal Installation Guide
An overview of the different standard types of oil seals and their main characteristics is shown below.


The metal case and spring material used in the oil seal should be selected based on the substance to be sealed.
Table 6 shows how to select the metal case and spring materials.