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7228A5

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7228A5TRSUHP3 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7228A5TRSUHP3

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 238 kN Basic Dynamic Load Rating
C0r 242 kN Basic Static Load Rating

Speeds

Grease 5200 min-1 Limiting Speed
Oil (Oil-air) 7700 min-1 Limiting Speed

Dimensions

A5: 25° Contact Angle
a 66.5 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

Performance

Pa 194 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 1499N 376N/μm -18μm
L 3010N 484N/μm -32μm
M 6731N 657N/μm -58μm
H 13407N 867N/μm -93μm

Additional information

39 g/brg Recommended Grease Quantities

Mass

7.91 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7228A5

© NSK Ltd.

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