Several common types of rolling bearings with built-in seals

Non-contact method: single lip seal

Structure, function and advantages and disadvantages: The combination of steel plate and rubber is a non-contact sealing device. The outer diameter of the inner ring has a grooved spear and a sealing lip to form a labyrinth seal. It is suitable for high speed, suitable for sealing and occupying space. The dust-proof and grease-proof performance is average.

Non-contact method: double lip seal

Structure, function and advantages and disadvantages: The non-contact double-shoulder sealing device with a combination of steel plate and rubber is the most commonly used one. Performance is similar to RU type.

Contact method: radial seal
Structure, function and advantages and disadvantages: The single-lip structure is the most commonly used type of "B" -shaped sealing device in combination with steel plate and rubber. High speed and dynamic performance in general, other performance is better.

Contact method: axial seal

Structure, function and advantages and disadvantages: The combined contact sealing device of steel plate and rubber, double lip structure, one lip is slightly in contact with the outer edge of the inner ring and the outer edge of the inner ring, and the other lip and the inner ring end face form a maze seal. All performances are good.

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