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Standard Series High Precision Angular Contact Ball Bearings
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Parts Number
Boundary Dimensions
|
d
|
55 |
mm |
Bore diameter |
|
D
|
80 |
mm |
Outside diameter |
|
B
|
13 |
mm |
Width |
|
r(min.)
|
1 |
mm |
Chamfer Dimension |
|
r1(min.)
|
0.6 |
mm |
Chamfer Dimension |
Basic Load Ratings
|
Cr
|
23.1 |
kN |
Basic Dynamic Load Rating |
|
C0r
|
16.4 |
kN |
Basic Static Load Rating |
Speeds
The limiting speeds of the ball guided cage is lower than the outer ring guided cage.
|
Grease
|
15000 |
min-1 |
Limiting Speed |
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Oil (Oil-air)
|
20000 |
min-1 |
Limiting Speed |
Dimensions
|
|
A5: 25° |
|
Contact Angle |
|
a
|
22.2 |
mm |
Effective Load Center |
Abutment and Fillet Dimensions
|
da(min.)
|
61 |
mm |
Diameter of Shaft Abutment |
|
Da(max.)
|
74 |
mm |
Diameter of Housing Abutment |
|
Db(max.)
|
75 |
mm |
Diameter of Housing Abutment |
|
ra(max.)
|
1 |
mm |
Radius of Shaft or Housing Fillet |
|
rb(max.)
|
0.5 |
mm |
Radius of Shaft or Housing Fillet |
Performance
Preload,Rigidity(DB and DF arrangement)
|
Preload |
Axial Rigidity |
Measured axial clearance |
| EL |
106N |
129N/μm |
-2μm |
| L |
217N |
167N/μm |
-5μm |
| M |
517N |
232N/μm |
-11μm |
| H |
1059N |
309N/μm |
-19μm |
Additional information
Mass
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Designations |
Basic Load Ratings |
Axial Internal Clearance |
Accuracy |
Limiting Speeds |
Mass |
Cr
|
C0r
|
|
min
|
max
|
Grease
(min-1) |
Oil (Oil-air)
(min-1) |
(kg) |
|
7911A5SN24TYNSUELP4Y |
23.1 |
16.4 |
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P4Y: Special class (Special bore and outside diameter tolerances, others are ISO Class 4.) |
15000 |
20000 |
0.165 |
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More Information
| NSK Product Type2 |
SP_ACBB_ST_A5 |
| NSK Product Type |
Super Precision Bearing |
| Designations |
7911A5SN24 |
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