The lip is specially designed to ensure the oil seal works effectively with the different forces that arise during rotation. Many different designs and materials are used, so countless types of oil seals are available. These are chosen according to the application; pumps, gearboxes, wheels, and many other rotating applications where fluids need to be sealed. They are used in a variety of sectors, such as the chemical industry, manufacturing, wind turbines, automotive sector, food industry, and more. Oil seals are used in nearly all sectors.
Nominal seal O.D.
D, mm
Figure 2.10. Garter spring
NBR, also known as nitrile rubber or nitrile, is the most popular material for an oil seal because of its good resistance to many oils and greases, such as mineral grease and hydraulic oil. Depending on their composition, synthetic oils and greases, such as those based on glycol, can damage NBR rubber materials. Depending on the amount of glycol, a PTFE lip seal may be the best choice. NBR is also unable to cope with contact with acids and solvents. The rubber is suitable for oil and grease at temperatures from -35 °C to 100 °C.
There are quite a number of factors to put into consideration when you’re choosing the right oil seal for your application. Some of them are discussed below.
Notes
*1 ASTM: American Society for Testing and Materials
*2 For more details on fluid compatibility, please see the following:
Oil seals, also known as rotary shaft seals, are a type of gasket used to prevent lubricant leakage and contamination in rotating machinery by creating a barrier between the moving and stationary parts.
However, like any new technology, there are also some drawbacks to using a bike spark plug. One of the main concerns is the cost of installation and maintenance. The initial cost of purchasing and installing a bike spark plug can be quite high, and regular maintenance is required to ensure that it continues to function properly. Additionally, some riders may find the increased speed and power of the bicycle difficult to control, particularly if they are not experienced cyclists.