6808RS Ball Bearing 40x52x7 mm Sealed Bearings 6808RS 6808RS Bearing, categorized as slim section, double sealed, radial, deep groove ball bearings, 6808RS bearings are made of Chrome Steel with chrome steel balls and steel cage, 6808RS bearing are closed with rubber seals to protect the bearing from dust or any possible contamination, 6808RS bearings are sealed and self lubricated, the 6808RS inner diameter is 40mm, the 6808RS outer diameter is 52mm and the 6808RS width is 7mm, the quality is set to EMQ (electric motor quality) to ensure high speeds up to 6,700 RPM, 6808RS bearings are lubricated with grease.