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7904C

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7904CTRSUELP5 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7904CTRSUELP5

Boundary Dimensions

d 20 mm Bore diameter
D 37 mm Outside diameter
B 9 mm Width
r(min.) 0.3 mm Chamfer Dimension
r1(min.) 0.15 mm Chamfer Dimension

Basic Load Ratings

Cr 7.30 kN Basic Dynamic Load Rating
C0r 4.25 kN Basic Static Load Rating

Speeds

Grease 40400 min-1 Limiting Speed
Oil (Oil-air) 61500 min-1 Limiting Speed

Dimensions

C: 15° Contact Angle
a 8.3 mm Effective Load Center

Abutment and Fillet Dimensions

da(min.) 22.5 mm Diameter of Shaft Abutment
Da(max.) 34.5 mm Diameter of Housing Abutment
Db(max.) 35.8 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 3.20 kN Permissible Axial Load

Calculation factors

f0 14.9 Factor

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 20N 19N/μm 1μm
L 42N 26N/μm -3μm
M 80N 35N/μm -8μm
H 152N 48N/μm -15μm

Additional information

0.21 g/brg Recommended Grease Quantities

Mass

0.036 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_ACBB_ST_C
NSK Product Type Super Precision Bearing
Designations 7904C

© NSK Ltd.

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