Double Lips - The engine, the heart of any automobile, relies heavily on gaskets. Cylinder head gaskets, for instance, sit between the engine block and cylinder head, ensuring that combustion gases don't escape and coolant and oil stay in their designated channels. They withstand extreme temperatures and pressures, making them a critical element in engine efficiency and longevity. A faulty cylinder head gasket can lead to engine failure, emphasizing the importance of this humble component.
Please see the following for the types of sealing devices for bearings.
How to Select the Right Bearing (Part 7): Components surrounding the bearing
Metal O.D. wall
(with a reinforcing inner metal case)
IVEVO / VOLVO / SCANIA
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.
ERIKS type GV (type C according to DIN) is equivalent to type M, but is a heavy-duty version with a double metal casing. This can be a useful solution with larger diameters in more demanding applications. There is also a version of this type with a dust lip; the GVST (type CS according to DIN).


spring loaded
Metal O.D. wall
(with a reinforcing inner metal case)
NBR
In order for the sealing property of the oil seal you selected to really shine, attention needs to be paid to how it is handled.
In the event of seal failure, it is necessary to take effective countermeasures.
Because the inner diameter of the oil seal must be stretched during assembly, it is necessary for the shaft to possess a ramped edge. The angle at which the ramped taper should be chamfered is 30° a 50°. If a flange or keyway is present on the shaft, it is best to use a bushing. The bore should also have a chamfer of 30° over at least 1 mm on the ramped side. Be sure to round off the edges properly in the process.



