6808 dd nsk6808DD d 40 mm Bore diameter D 52 mm Outside diameter B 7 mm Width r (min.) 0. 3 mm Chamfer dimension d1 49. 8 mm Outside diameter of inner ring D1 42. 1 mm Bore diameter of outer ring Cr 7000 N Basic dynamic load rating C0r 5550 N Basic static load rating Grease 6700 min 1 Grease lubrication da (min.) 42 mm Diameter of shaft abutment (min) da (max.) 42 mm Diameter of shaft abutment Da (max.) 50 mm Diameter of housing abutment ra (max.) 0. 3 mm Radius