Understanding SKF Bearing Seals: RS, 2RS, ZZ, and Open Types

Sealing design protects bearings from dust, moisture, and contamination. Open type: Used in clean, lubricated environments ZZ (metal shields): For dry, dust-free conditions RS (single lip seal): Good protection against moisture and...

Author

zhaikevip@gmail.com

Published

April 7, 2026

Reading

1 min

Understanding SKF Bearing Seals: RS, 2RS, ZZ, and Open Types

Need a custom bearing?

Talk to our SKF-certified engineers

7-day prototyping. Reply within 12 hours.

Submit RFQ

Sealing design protects bearings from dust, moisture, and contamination.

Open type: Used in clean, lubricated environments
ZZ (metal shields): For dry, dust-free conditions
RS (single lip seal): Good protection against moisture and dirt
2RS (double lip seals): Maximum protection in harsh environmentsSKF sealed bearings come pre-greased, reducing maintenance and improving reliability in heavy-duty applications.