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7228C

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7228CTRSUELP4 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7228CTRSUELP4

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 250 kN Basic Dynamic Load Rating
C0r 254 kN Basic Static Load Rating

Speeds

Grease 5900 min-1 Limiting Speed
Oil (Oil-air) 9000 min-1 Limiting Speed

Dimensions

C: 15° Contact Angle
a 47.1 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 172 kN Permissible Axial Load

Calculation factors

f0 14.8 Factor

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 910N 150N/μm -24μm
L 1832N 200N/μm -45μm
M 4081N 286N/μm -82μm
H 8296N 404N/μm -131μm

Additional information

39 g/brg Recommended Grease Quantities

Mass

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

© NSK Ltd.

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