In the great outdoors, access to fresh water may be limited. When cleaning, try to minimize water usage by using just enough to get the job done. Additionally, always ensure that water spills are contained and that you remain conscientious of local water sources.
Rotary Wheel Of Auto Parts
VMQ (silicone)
Requirements of the shaft
Even more important than a correct interference fit of the Oil Seal is a perfectly smooth shaft in the region of the seal, particularly if shaft surface speed is high and the medium to be sealed is under a certain amount of excess pressure. The surface roughness of the shaft depends on the average profile depth Ra of the tool marks caused by the machining process. Oil Seals made of PTFE require, independent of the surface speed, a surface roughness of between 0,1 to 0,2 mm, because PTFE has less wear resistance than rubber seals. For normal circumstances, the shaft in the region of the seal must have a surface roughness of approximately: To summarize, the surface of the shaft in the region of the seal should not have noticeable machining marks. For pivoting shafts and other difficult or critical sealing applications, it is recommended that Oil Seals with a helical groove hydrodynamic pattern, which has a pumping effect, be used. When grinding and polishing, an axial movement of the grindstone along the shaft must be avoided in order to prevent machine lay.
Proper installation and maintenance of oil seals are essential to ensure optimal performance and longevity. Before installing a new oil seal, it is important to clean and inspect the shaft and seal housing for any damage or debris that could affect the sealing performance. Additionally, applying a thin layer of lubricant to the seal lip can help improve sealing efficiency and reduce friction during operation.
Fundamental things and its importance
VMQ, also known as silicone, is also used for oil seals, but this is less common because the mechanical strength of VMQ is low and this material has poor wear-resistance This makes it less suitable for dynamic applications, but it can withstand fairly low and high temperatures from -60 °C to 200 °C. Many types of VMQ are also suitable for contact with pharmaceutical and food products, so VMQ is an option worth considering. VMQ oil seals are usually available on request.


Rotary Wheel Of Auto Parts
If you follow the above instructions, the oil seals should work properly. Also watch the video below for an example of the installation process.
Different Types of Oil Seals
The most common oil seals are the ERIKS types R, RST, M and MST, which correspond respectively to types A, AS, B and BS according to DIN 3760/ISO 6194.