6311zzcm Nsk6311ZZ d 55 mm Bore diameter D 120 mm Outside diameter B 29 mm Width r (min.) 2 mm Chamfer dimension Cr 78500 N Basic dynamic load rating C0r 44500 N Basic static load rating Grease 6700 min 1 Grease lubrication da (min.) 64 mm Diameter of shaft abutment (min) da (max.) 72. 5 mm Diameter of shaft abutment Da (max.) 111 mm Diameter of housing abutment ra (max.) 2 mm Radius of shaft or housing fillet fo 13. 1 Factor z 8 Number of Balls Dw 20. 638 mm