Rubber type
⑤
An oil seal, also known as crankshaft retainer, is a small device, but essential to ensure the proper engine operation. It plays a key role in all moving parts of an engine, acting as a physical barrier. This mechanical seal fulfils the dual purpose of sealing a rotary shaft to maintain the necessary lubrication (avoiding leaks) and preventing other foreign matter from contaminating shafts and bearings in the rotary shaft equipment.
For more detailed information, please see the following:
Fitting an oil seal
Polytetrafluoroethylene
Chemical resistant
Low coefficient of friction poor elastic properties not wear resistant if used by dynamic applications
6. Ensure that the oil seal solidifies

metal cased oil seals. They can be used with a wide range of oils, greases, and other lubricants, making them suitable for various industrial applications. Additionally, these seals can withstand exposure to harsh chemicals, extreme temperatures, and abrasive materials without compromising their sealing capabilities.
(no lead marks)
In this way, selecting the appropriate oil seal will lead to machine design that is economically superior!
Mercedes-Benz