NSK 7228A
Standard Series High Precision Angular Contact Ball Bearings
(BRAND)：NSK
(Availability)：In Stock
Designations
7228A
Boundary Dimensions
d
140
mm
Bore diameter
D
250
mm
Outside diameter
B
42
mm
Width
r(min.)
3
mm
Chamfer Dimension
r1(min.)
1.1
mm
Chamfer Dimension
Basic Load Ratings
Cr
275
kN
Basic Dynamic Load Rating
C0r
234
kN
Basic Static Load Rating
Speeds
Grease
3900
min-1
Limiting Speed
Oil (Oil-air)
5200
min-1
Limiting Speed
Dimensions
A: 30°
Contact Angle
a
77.3
mm
Effective Load Center
Abutment and Fillet Dimensions
da(min.)
154
mm
Diameter of Shaft Abutment
Da(max.)
236
mm
Diameter of Housing Abutment
Db(max.)
243
mm
Diameter of Housing Abutment
ra(max.)
2.5
mm
Radius of Shaft or Housing Fillet
rb(max.)
1
mm
Radius of Shaft or Housing Fillet
