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7903A5

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7903A5TYNSULP4 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7903A5TYNSULP4

Boundary Dimensions

d 17 mm Bore diameter
D 30 mm Outside diameter
B 7 mm Width
r(min.) 0.3 mm Chamfer Dimension
r1(min.) 0.15 mm Chamfer Dimension

Basic Load Ratings

Cr 5.00 kN Basic Dynamic Load Rating
C0r 2.80 kN Basic Static Load Rating

Speeds The limiting speeds of the ball guided cage is lower than the outer ring guided cage.

Grease 42600 min-1 Limiting Speed
Oil (Oil-air) 60000 min-1 Limiting Speed

Dimensions

A5: 25° Contact Angle
a 9.0 mm Effective Load Center

Abutment and Fillet Dimensions

da(min.) 19.5 mm Diameter of Shaft Abutment
Da(max.) 27.5 mm Diameter of Housing Abutment
Db(max.) 28.8 mm Diameter of Housing Abutment
ra(max.) 0.3 mm Radius of Shaft or Housing Fillet
rb(max.) 0.15 mm Radius of Shaft or Housing Fillet

Performance

Pa 2.21 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 15N 34N/μm 1μm
L 35N 47N/μm -1μm
M 77N 63N/μm -4μm
H 149N 82N/μm -8μm

Additional information

0.12 g/brg Recommended Grease Quantities

Mass

0.017 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7903A5

© NSK Ltd.

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