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Boundary Dimensions
d 20 mm Bore diameter
D 47 mm Outside diameter
B 14 mm Width
EW 40 mm Raceway diameter of outer ring
r (min.) 1 mm Chamfer dimension
r1 (min.) 0.6 mm Chamfer dimension
Basic Load Ratings
Cr 19000 N Basic dynamic load rating
C0r 12700 N Basic static load rating
Speeds 
Thermal Speed Rating (Oil-bath) 18000 min-1 Oil-bath lubrication subject to conditions outlined in ISO 15312
Grease 12000 min-1 Grease lubrication
Oil (Oil-bath) 14000 min-1 Oil-bath lubrication
Abutment and Fillet Dimensions
da (min.) 25 mm Diameter of shaft abutment
Db (min.) 42 mm Diameter of housing abutment
Da (max.) 42 mm Diameter of housing abutment
Db (max.) 43 mm Diameter of housing abutment
ra (max.) 1 mm Radius of shaft or housing fillet
rb (max.) 0.6 mm Radius of shaft or housing fillet
Mass
(approx.) 0.112 kg NF204W
Boundary Dimensions
d 20 mm Bore diameter
D 47 mm Outside diameter
B 14 mm Width
EW 40 mm Raceway diameter of outer ring
r (min.) 1 mm Chamfer dimension
r1 (min.) 0.6 mm Chamfer dimension
Basic Load Ratings
Cr 19000 N Basic dynamic load rating
C0r 12700 N Basic static load rating
Speeds 
Thermal Speed Rating (Oil-bath) 18000 min-1 Oil-bath lubrication subject to conditions outlined in ISO 15312
Grease 12000 min-1 Grease lubrication
Oil (Oil-bath) 14000 min-1 Oil-bath lubrication
Abutment and Fillet Dimensions
da (min.) 25 mm Diameter of shaft abutment
Db (min.) 42 mm Diameter of housing abutment
Da (max.) 42 mm Diameter of housing abutment
Db (max.) 43 mm Diameter of housing abutment
ra (max.) 1 mm Radius of shaft or housing fillet
rb (max.) 0.6 mm Radius of shaft or housing fillet
Mass
(approx.) 0.112 kg

We also offer the following bearing  brands
ZWZ LYC C&U TWB TMB HRB LS NSK FAG ROLLWAY