Full definition
Bearing with integrated seals that retain factory-filled grease for life and exclude external contaminants. Designation: 2RS or 2RSH (two contact rubber/NBR seals), 2Z or 2ZR (two non-contact metal shields, lower friction torque). Factory grease lasts 5–10 years under normal conditions. Operating temperature: –25°C to +110°C (2RS). ISO 15 standard. Brands: SKF, NSK, FAG, NTN, Timken.