6903zzcm nsk6903ZZ d 17 mm Bore diameter D 30 mm Outside diameter B 7 mm Width r (min.) 0. 3 mm Chamfer dimension d1 27. 8 mm Outside diameter of inner ring D1 19. 5 mm Bore diameter of outer ring Cr 5050 N Basic dynamic load rating C0r 2550 N Basic static load rating Grease 24000 min 1 Grease lubrication da (min.) 19 mm Diameter of shaft abutment (min) da (max.) 19. 5 mm Diameter of shaft abutment Da (max.) 28 mm Diameter of housing abutment ra (max.) 0. 3 mm