Moreover, this material demonstrates excellent thermal and electrical insulation properties, adding another layer of protection against temperature fluctuations and electrical currents
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- One of the main factors that can influence the price of oil seals is the type of seal itself. There are various types of oil seals available in the market, such as lip seals, mechanical seals, and hydraulic seals. Each type of seal has its own unique features and benefits, which can affect its cost. For example, mechanical seals are generally more expensive than lip seals due to their complexity and durability.
- The spark plug, a seemingly minor component in the vast machinery of an automobile, plays a pivotal role in modern automotive engineering. This small but mighty piece ensures the seamless transition from fuel to motion, acting as a catalyst for combustion within the engine. The proper use and maintenance of spark plugs are essential for optimal vehicle performance, fuel efficiency, and emission reduction.
What are oil seals?
Above, are all the components of an oil seal and all its naming conventions. Beyond selecting the correct size, the three primary selection criteria are Material, Lip, and Case. If you have an oil seal you’d like custom designed and made, send us your specifications through our Oil Seal Design Form.
Please see the following for the types of sealing devices for bearings.
How to Select the Right Bearing (Part 7): Components surrounding the bearing
Table 2 a): Common types of oil seals (with spring)


When selecting rubber valve cover gaskets, it is important to prioritize quality, durability, and compatibility with the specific vehicle model. High-quality gaskets should be designed to withstand the heat and pressure within the engine, providing a reliable and long-lasting seal. Choosing reputable suppliers and manufacturers known for producing high-quality rubber valve cover gaskets is crucial to ensure the reliability and longevity of these critical components.
Silicone oil seals, which are also called VMQ, have strong resistance to temperature, which ranges from -140 degrees Fahrenheit to 392 degrees Fahrenheit. They are also resistant to ozone, light, and harsh weather conditions. Silicone is frequently used in hydraulics and pneumatics, as well as in the food and medical industries. Due to the material’s transparency and flexibility, it’s commonly chosen for the manufacturing of o-rings, molded parts, and flat seals, as well as electrical insulators.
The garter spring is located at the end of the primary sealing lip and used to apply pressure to the sealing lip against the shaft. Common garter spring material types are:
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.
Pour-point depressants: This additive has nothing to do the actual pouring of your oil. In fact, pour-point depressants help prevent the wax particles in the oil from hardening in cold conditions. As a result, the motor oil flows freely even in low, cold temperatures and the engine doesn’t need to work any harder to pump it.
Figure 5: JTEKT seal numbering system
Table 6: Codes and numbers used in seal numbers
If the car has a manual gearbox , select first or reverse gear and put the handbrake full on. Otherwise, disconnect the battery and remove the starter motor .
NBR is recommended for the majority of standard applications and is the most commonly used rubber (elastomer) material. This is because of Nitrile's compatibility with most environments as well as its relatively low cost. Generally nitrile is used for disposable non-latex gloves, footwear, automotive transmission belts, synthetic leather, hoses, o-rings, gaskets, oil seals, and more.
R
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.