NSK NU221EM
Single-Row Cylindrical Roller Bearings
(BRAND)：NSK
(Availability)：In Stock
Designations
NU221EM
Boundary Dimensions
d
105
mm
Bore diameter
D
190
mm
Outside diameter
B
36
mm
Width
FW
125
mm
Raceway diameter of inner ring
r (min.)
2.1
mm
Chamfer dimension
r1 (min.)
2.1
mm
Chamfer dimension
Basic Load Ratings
Cr
320000
N
Basic dynamic load rating
C0r
310000
N
Basic static load rating
Speeds
Thermal Speed Rating (Oil-bath)
4300
min-1
Oil-bath lubrication subject to conditions outlined in ISO 15312
Mechanical (forced-circulation oil)
6000
min-1
Properly designed and controlled forced-circulation oil lubrication
Grease
3400
min-1
Grease lubrication
Oil (Oil-bath)
4000
min-1
Oil-bath lubrication
db (min.)
116
mm
Diameter of shaft / spacer sleeve abutment
db (max.)
121
mm
Diameter of shaft / spacer sleeve abutment
dc (min.)
129
mm
Diameter of shaft abutment
Da (max.)
179
mm
Diameter of housing abutment
ra (max.)
2
mm
Radius of shaft or housing fillet
rb (max.)
2
mm
Radius of shaft or housing fillet
Abutment and Fillet Dimensions
Mass approx.
4.48
kg
Mass approx.
