6304c3e nsk6304 d 20 mm Bore diameter D 52 mm Outside diameter B 15 mm Width r (min.) 1. 1 mm Chamfer dimension d1 42 mm Outside diameter of inner ring D1 30. 2 mm Bore diameter of outer ring Cr 17500 N Basic dynamic load rating C0r 7900 N Basic static load rating Grease 16000 min 1 Grease lubrication Oil (Oil bath) 19000 min 1 Oil bath lubrication da (min.) 26. 5 mm Diameter of shaft abutment (min) da (max.) 28 mm Diameter of shaft abutment Da (max.) 45. 5 mm