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7908A5

Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
7908A5TYNSULP3 Standard Series High Precision Angular Contact Ball Bearings
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Parts Number

7908A5TYNSULP3

Boundary Dimensions

d 40 mm Bore diameter
D 62 mm Outside diameter
B 12 mm Width
r(min.) 0.6 mm Chamfer Dimension
r1(min.) 0.3 mm Chamfer Dimension

Basic Load Ratings

Cr 18.1 kN Basic Dynamic Load Rating
C0r 11.2 kN Basic Static Load Rating

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

Grease 19700 min-1 Limiting Speed
Oil (Oil-air) 28000 min-1 Limiting Speed

Dimensions

A5: 25° Contact Angle
a 17.9 mm Effective Load Center

Abutment and Fillet Dimensions

da(min.) 45 mm Diameter of Shaft Abutment
Da(max.) 57 mm Diameter of Housing Abutment
Db(max.) 59.5 mm Diameter of Housing Abutment
ra(max.) 0.6 mm Radius of Shaft or Housing Fillet
rb(max.) 0.3 mm Radius of Shaft or Housing Fillet

Performance

Pa 8.90 kN Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

Preload Axial Rigidity Measured axial clearance
EL 68N 81N/μm -1μm
L 113N 97N/μm -3μm
M 291N 139N/μm -9μm
H 572N 182N/μm -16μm

Additional information

0.70 g/brg Recommended Grease Quantities

Mass

0.110 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)
7908A5TYNSULP3 18.1 11.2 P3: Special class (ISO Class 4 dimensional tolerances and ISO Class 2 running accuracy.) 19700 28000 0.110

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CAD
More Information
NSK Product Type2 SP_ACBB_ST_A5
NSK Product Type Super Precision Bearing
Designations 7908A5

© NSK Ltd.

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