Information about ball bearing seals
On this page you will find the correct seal
Deep groove ball bearings without seal (open bearing)
Advantages
- no frictional resistance
- easy relubrication
Disadvantages
- quick soiling

Deep groove ball bearings with steel seals on both sides (ZZ)
ZZ-seal
- Comparable with FAG as well as SKF: 2Z
- Material: sheet steel
- Structure: gap seal made of a profiled sheet steel washer
Advantages
- Touchless
- No additional friction and increase in temperature
- Can be used up to limiting speed
- Good sealing action against leakage of grease
- Long maintenance-free period (lifetime lubrication)
Disadvantages
- Limited sealing action in case of soilingg

Deep groove ball bearings with rubber seals on both sides (2RS)
2RS seal
- Comparable with FAG: 2RSR SKF: 2RS1, 2RSH
- Material: NBR, temperature resistance -20 °C to 100°C (up to 120° C for a short time)
- Structure: contact lip seal on both sides
Advantages
- High sealing action against soiling and humidity
- NBR is resistant to a multitude of aggressive materials
- Long maintenance-free term (lifetime lubrication)
Disadvantages
- Increased frictional resistance

Suffix-key
Brand/Seal | SKF | FAG | NKE | NSK | NTN | Koyo | SNR | TWB |
---|---|---|---|---|---|---|---|---|
1/2 Sealing shield(s) Z / ZZ our designation | Z / 2Z | Z / 2Z | Z / 2Z | Z / ZZ | Z / ZZ | Z / ZZ | Z / ZZ | Z / ZZ |
1/2 Sealing shield(s) RS / 2RS our designation | RS1 / 2RS1 RSH / 2RSH | RSR / 2RSR | RSR / 2RSR RS2 / 2RS2 | DU / DDU | LU / LLU | RS / 2RS | E / EE | RS / 2RS |