Single row deep groove radial ball bearings Material: Bearing steel. - Standard ball bearings in high quality. - Most common bearing type. - Usable for high speed. - Insensitive in use and maintenance. - On choice: With friction-free metal shields ZZ (= 2Z) or with contacting rubber seals 2RS. Temperature range: -20°C to +90°C (caused by type of lubrication), short-term up to 110°C. Other versions or other bearing types on request.