6820 dd nsk6820DD d 100 mm Bore diameter D 125 mm Outside diameter B 13 mm Width r (min.) 1 mm Chamfer dimension Cr 21500 N Basic dynamic load rating C0r 23000 N Basic static load rating Grease 2800 min 1 Grease lubrication da (min.) 105 mm Diameter of shaft abutment (min) da (max.) 105. 5 mm Diameter of shaft abutment Da (max.) 120 mm Diameter of housing abutment ra (max.) 1 mm Radius of shaft or housing fillet fo 17. 3 Factor z 26 Number of Balls Dw 7. 144 mm