Super-precision, high-speed B design, single row angular contact ball bearing with seals
These super-precision, high-speed, single row angular contact ball bearings, with 25° contact angle, with seals, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only.
Compared to the equivalent SKF E design high-speed bearings, these are suited for lighter loads.
- Very high running accuracy
- Accommodate high speeds
- Reduced stresses on rolling contact surfaces
- Non-contact seals
- Integral sealing prolongs bearing service life
Dimensions
| d |
55 mm
|
Bore diameter |
| D |
90 mm
|
Outside diameter |
| B |
18 mm
|
Width |
| d1 |
68.18 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
66.65 mm
|
Shoulder diameter of inner ring (small side face) |
| D2 |
79.39 mm
|
Recess diameter of outer ring (large side face) |
| r1,2 |
min.1.1 mm
|
Chamfer dimension |
| r3,4 |
min.0.6 mm
|
Chamfer dimension |
| a |
26 mm
|
Distance from side face to pressure point |
Abutment dimensions
| da |
min.61 mm
|
Diameter of shaft abutment |
| da |
max.67.6 mm
|
Diameter of shaft abutment |
| db |
min.61 mm
|
Diameter of shaft abutment |
| db |
max.66.1 mm
|
Diameter of shaft abutment |
| Da |
max.84 mm
|
Diameter of housing abutment |
| Db |
max.86.8 mm
|
Diameter of housing abutment |
| ra |
max.1 mm
|
Radius of fillet |
| rb |
max.0.6 mm
|
Radius of fillet |
Calculation data
| Basic dynamic load rating |
C |
13.3 kN
|
| Basic static load rating |
C0 |
10.4 kN
|
| Fatigue load limit |
Pu |
0.44 kN
|
| Attainable speed for grease lubrication |
|
19 000 r/min
|
| Contact angle |
α |
25 °
|
| Ball diameter |
Dw |
6.747 mm
|
| Number of rows |
i |
1
|
| Number of balls (per bearing) |
z |
26
|
Preload and stiffness (back-to-back, face-to-face)
| Preload, class A |
GA |
78 N
|
| Axial stiffnes for preload A (sets of two brgs back to back or face to face) |
|
100 N/µm
|
| Preload, class B |
GB |
155 N
|
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) |
|
128 N/µm
|
| Preload, class C |
GC |
470 N
|
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) |
|
194 N/µm
|
Correction factors for preload calculation
| Correction factor dependent on bearing series and size |
f |
1.06
|
| Correction factor dependent on contact angle |
f1 |
0.99
|
| Correction factor, preload class A |
f2A |
1
|
| Correction factor, preload class B |
f2B |
1.01
|
| Correction factor, preload class C |
f2C |
1.04
|
| Correction factor for hybrid bearings |
fHC |
1
|
Factors for equivalent bearing load calculation
| Limiting value |
e |
0.68
|
| Axial load factor (single, tandem) |
Y2 |
0.87
|
| Axial load factor (single, tandem) |
Y0 |
0.38
|
| Radial load factor (single, tandem) |
X2 |
0.41
|
| Axial load factor (back-to-back, face-to-face) |
Y1 |
0.92
|
| Axial load factor (back-to-back, face-to-face) |
Y2 |
1.41
|
| Axial load factor (back-to-back, face-to-face) |
Y0 |
0.76
|
| Radial load factor (back-to-back, face-to-face) |
X2 |
0.67
|
