What is the difference between bearing ZZ and 2RS seals?

There is a significant difference between ZZ and 2RS in the bearing sealing method. ‌The bearing seal represented by ZZ is a double-sided seal with a dust cover. It is a non-contact seal and is mainly used for dust prevention and sealing of the bearing. The dust cover is made of steel plate and is stamped with a mold. The bearing seal represented by 2RS is a rubber seal ring with a skeleton on both sides, which is a contact seal. It relies on the elastic deformation of the rubber to complete the fastening in the bearing to prevent grease leakage and the entry of external foreign matter. ‌

‌ZZ and 2RS are also different in terms of materials and installation methods. ‌ZZ's dust cover is stamped with a mold and pressed into the bearing. It is a non-contact seal. The sealing ring of 2RS is contact type and relies on the elastic deformation of rubber to complete the tightening.

‌In terms of application scenarios, ZZ and 2RS are also different. ‌ZZ is mainly used in situations where dust-proofing and sealing are required. It is suitable for environments where sealing requirements are not high and dust needs to be prevented from entering. The 2RS is suitable for occasions that require higher sealing performance, and can effectively prevent grease leakage and external foreign matter from entering.