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21308EAE4

Spherical Roller Bearings

21308EAE4

Spherical Roller Bearings

main product photo
Images shown are representations. Designs and specifications may differ from actual products.
Grouped product items
Parts Number
21308EAE4
21308EAE4C3
21308EAE4C2
21308EAE4C4
21308EAE4C5
Display units

Designations

21308EAE4

Boundary Dimensions

d 40 mm Bore diameter
D 90 mm Outside diameter
B 23 mm Width
r (min.) 1.5 mm Chamfer dimension

Basic Load Ratings

Cr 118000 N Basic dynamic load rating
C0r 111000 N Basic static load rating

Speeds

Thermal Speed Rating (Oil-bath) 6700 min-1 Oil-bath lubrication subject to conditions outlined in ISO 15312
Mechanical (forced-circulation oil) 11000 min-1 Properly designed and controlled forced-circulation oil lubrication
Grease 6000 min-1 Grease lubrication
Oil (Oil-bath) 7500 min-1 Oil-bath lubrication

Abutment and Fillet Dimensions

da (min.) 49 mm Diameter of shaft abutment
da (max.) 55 mm Diameter of shaft abutment
Da (min.) 75 mm Diameter of housing abutment
Da (max.) 81 mm Diameter of housing abutment
ra (max.) 1.5 mm Radius of shaft or housing fillet

Calculation factors

e 0.25 Constant
Y2 3.9 Axial load Factors
Y3 2.7 Axial load Factors
Y0 2.6 Axial load Factors

Mass

Mass approx. 0.73 kg Mass approx.
CAD
Designations Boundary Dimensions Basic Load Ratings Radial Internal Clearance Tolerance Class Speeds Mass
Limiting Speeds
d
(mm)		 D
(mm)		 B
(mm)		 Cr
(N)		 C0r
(N)		 min
 max
 Thermal Speed Rating (Oil-bath)
(min-1)		 Mechanical (forced-circulation oil)
(min-1)		 Grease
(min-1)		 Oil (Oil-bath)
(min-1)		 (kg)
21308EAE4 40 90 23 118000 111000 6700 11000 6000 7500 0.73

Not to scale.
(*) The chamfer dimensions are minimum values.
Suffix K and K30 represents bearings with tapered bores (taper 1:12 or 1:30).

More Information
NSK Product Type2 SRB_CTB
NSK Product Type Bearing

© NSK Ltd.

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