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7903C

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7903CTRSUELP5 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7903CTRSUELP5

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 6.30 kN Basic Dynamic Load Rating
C0r 2.94 kN Basic Static Load Rating

Speeds

Grease 49000 min-1 Limiting Speed
Oil (Oil-air) 74500 min-1 Limiting Speed

Dimensions

C: 15° Contact Angle
a 6.6 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 2.09 kN Permissible Axial Load

Calculation factors

f0 14.8 Factor

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 11N 15N/μm 3μm
L 25N 21N/μm 0μm
M 56N 30N/μm -5μm
H 119N 43N/μm -12μm

Additional information

0.12 g/brg Recommended Grease Quantities

Mass

0.017 kg Mass(approx.)
Designations Basic Load Ratings Axial Internal Clearance Accuracy Limiting Speeds Mass
Cr
 C0r
 min
 max
 Grease
(min-1)		 Oil (Oil-air)
(min-1)
(kg)
7903CTRSUELP5 6.30 2.94 P5: ISO Class 5 49000 74500 0.017

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CAD
More Information
NSK Product Type2 SP_ACBB_ST_C
NSK Product Type Super Precision Bearing
Designations 7903C

© NSK Ltd.

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