Oil seals are installed beside the bearing while the flexible lip is pressed against the rotating shaft. The casing pressing into the housing holds the seal in place. The sealing lip is essentially lubricated to minimize the risk of overheating due to the generated friction.
Industrial oil seals are critical components used in a wide range of industrial machinery and equipment to prevent the leakage of lubricants and the ingress of contaminants. These seals play a vital role in maintaining the efficiency and longevity of industrial machinery by ensuring the proper containment of lubricants and protecting internal components from wear and damage. Industrial oil seals are utilized in various applications, including pumps, compressors, hydraulic systems, and manufacturing equipment.

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Dynamic seals called bearing isolators are used to shield bearings from external impurities. They are revolving (rotor) and stationary (stator) elements. O-rings or strong seals are used in some bearing isolators, while they are constructed like labyrinths in others.
6. AMOUNT OF LUBRICANT: Seals perform better when lubricated but some machines will go through some dry spells. When this occurs using a leather or PTFE seal will be more beneficial as those type of seals can operate with less lubrication.
2) Special seal types and their features
Aspects to consider when selecting oil seals
The functionality of oil seals in between machines cannot be emphasized. Apart from their primary function of preventing the entry and escape of elements that can damage the machines, they also help to elongate the machines’ lifespan.
-20 °C to + 130 °C
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.