Different bearing seal types are as below，
Z: Steel plate dust cover on one side of bearing
ZZ: Steel plate dust cover on both sides of bearing
V: Non-contact dust cover made of rubber on one side of the bearing
VV: Rubber non-contact dust cover on both sides of the bearing
DU: Rubber contact dust cover on one side of bearing
DDU: Rubber contact dust cover on both sides of the bearing
RS: There is a skeleton type rubber seal on one side of the bearing (contact type).
For Example: 6309-RS
2RS: With skeleton rubber seals on both sides of the bearing (contact type).
For Example: 6210-2RS. (Note: The contact seal ring of NSK bearing is expressed as DDU, contact seal ring of NTN bearing is expressed as LLU)
RZ: There is a skeleton type rubber seal on one side of the bearing (non-contact type).
For Instance: 6210-RZ
2RZ: Skeleton rubber seals on both sides of the bearing (non-contact type).
For Instance: 6210-2RZ
Z: Dust cover on one side of the bearing.
For Example: 6210-Z
2Z: Dust cover on both sides of the bearing.
For Example: 6210-2Z. (Note: The representation method of NSK is ZZ)
RSZ: The bearing has a skeleton rubber seal (contact type) on one side and a dust cover on the other.
For Example: 6210-RSZ
RZZ: The bearing has a skeleton rubber seal (non-contact type) on one side and a dust cover on the other.
For Example: 6210-RZZ
ZN: The bearing has a dust cover on one side and a stop groove on the outer ring on the other side. For Example: 6210-ZN
ZNR: One side of the bearing has a dust cover, and the other side has a stop groove and a stop ring on the outer ring.
For Example: 6210-ZNR
ZNB: The bearing has a dust cover on one side and a stop groove on the outer ring on the same side.
For Example: 6210-ZNB
2ZN: The bearing has dust cover on both sides, and the outer ring has a stop groove.
For Example: 6210-2ZN
If you have any doubt or suggestion for different bearing seal types, just leave a comment or email us. Our technician will reply you within 12 hours!
