Operating conditions such as the engine’s temperature, position, size, pressure and shaft speed largely determine which individual oil seal composition is most suitable for every individual application.

Apply gasket sealant to the engine flange and refit the cover. Tighten the fixings but do not overtighten them.
Figure 4: Shaft end chamfer
Type ‘C’ oil seal has an additional cup inserted into the outer cup of ‘B’ type. The supplementary metal inner ring provides a superior stiffness. This type is recommended for use in heavy polluted environments. As the static sealing between housing and metallic shell is limited, low viscosity media can “creep”.
The basic principle of sealing is straightforward – the flexible lip is held against the rotating part (usually the shaft) whilst the casing (or O.D.) is pressed into the housing or bore and holds the seal in place. The sealing lip needs some form of lubrication to avoid overheating and is usually energized by means of a garter spring.
There are a few options to remedy this situation:
When selecting a 40mm rubber gasket for a specific application, it is important to consider factors such as the operating temperature, pressure, and chemical compatibility to ensure optimal performance and longevity. Additionally, the gasket should be installed properly following manufacturer recommendations to ensure a leak-proof seal.
New Spark Plugs: Importance and Impact
Heat resistance
Global O-Ring and Seal carries a full line of oil seals in all industry standard sizes and has the ability to create custom oil seals. If you are a distributor or user of oil seals who may have need for our services, contact us today to speak with one of our team members, request a no-obligation quote, or place an order from our extensive inventory at GlobalOring.com.