
Construction of an Oil Seal
(hydrodynamic ribs)
• Rotational speed
• Oil viscosity, etc.
How Oil Seals
An overview of the different standard types of oil seals and their main characteristics is shown below.
Almost every lip seal is constructed to have a flexible inner part that creates a dynamic seal on the moving shaft, as well as a hard outer casing that statically matches the machine-end cover. The flexible part is made from different grades of rubber, while the hard part is made of light-gauge metal or strong plastic.

black spark plug. This increased durability can result in fewer maintenance issues and a more reliable engine overall.
Most ERIKS oil seals, such as the types M, MST, R and RST, are made of NBR as standard.
ERIKS also supplies the types GR and GRST. These are virtually identical to the types R and RST, except in this case the metal inner ring is also completely encased in rubber. ERIKS uses FKM rubber here as standard, so these seals are ideal for use in acidic environments.

HID (High Intensity Discharge)
To install an oil seal properly, the shaft must be undamaged. This is so the oil seal can do its job properly on the one hand, and to prevent it from being damaged during fitting on the other. In addition, it is very important to lubricate the shaft, the sealing lip and the bore with plenty of grease. This will allow the oil seal to slide more easily over the shaft and prevent dry running after the first rotation. The oil seal may also come into contact with the keyway, thread or other grooves when sliding over the shaft. By taping or covering the shaft at the location of these irregularities with oil-soaked paper, the oil seal can be mounted without damage to the sealing lip.
THE USES OF OIL SEALS
Some aspects to consider when selecting this component are:
4. Seal characteristics
Figure 14.4. Effect of aeration on oil aging.5 Chart shows percent retained elongation after aging for 28 days at 150°C in Mobil 276.
Type