7018 ACDGB/P4A
Super-precision, high-capacity, universally matchable single row angular contact ball bearing
These super-precision, high-capacity, single row angular contact ball bearings accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only.
They are designed to accommodate heavy loads at relatively high speeds under low to moderate operating temperatures. Being universally matchable, they can be used together in arrangements to provide effective load sharing, within a predetermined preload range, without the use of shims or similar devices.
- Very high running accuracy
- Very high load carrying capacity
- Relatively high speed and stiffness
- Universally matchable
Dimensions
| d |
90 mm
|
Bore diameter |
| D |
140 mm
|
Outside diameter |
| B |
24 mm
|
Width |
| d1 |
105.4 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
105.4 mm
|
Shoulder diameter of inner ring (small side face) |
| D1 |
124.6 mm
|
Shoulder diameter of outer ring (large side face) |
| r1,2 |
min.1.5 mm
|
Chamfer dimension |
| r3,4 |
min.1 mm
|
Chamfer dimension |
| a |
39 mm
|
Distance from side face to pressure point |
Abutment dimensions
| da |
min.97 mm
|
Diameter of shaft abutment |
| db |
min.97 mm
|
Diameter of shaft abutment |
| Da |
max.133 mm
|
Diameter of housing abutment |
| Db |
max.136 mm
|
Diameter of housing abutment |
| ra |
max.1.5 mm
|
Radius of fillet |
| rb |
max.1 mm
|
Radius of fillet |
| dn |
108.7 mm
|
Position of oil nozzle |
Calculation data
| Basic dynamic load rating |
C |
74.1 kN
|
| Basic static load rating |
C0 |
72 kN
|
| Fatigue load limit |
Pu |
2.85 kN
|
| Attainable speeds |
|
Refer to catalogue data or contact SKF for the attainable speeds
|
| Contact angle |
α |
25 °
|
| Ball diameter |
Dw |
15.875 mm
|
| Number of rows |
i |
1
|
| Number of balls (per bearing) |
z |
20
|
| Reference grease quantity (per bearing) |
Gref |
15 cm³
|
Preload and stiffness (back-to-back, face-to-face)
| Preload class |
|
B
|
| Axial stiffness |
|
321 N/µm
|
Correction factors for preload calculation
| Correction factor dependent on bearing series and size |
f |
1.1
|
| Correction factor dependent on contact angle |
f1 |
0.99
|
| Correction factor, preload class B |
f2B |
1
|
| Correction factor for hybrid bearings |
fHC |
1
|
Factors for equivalent bearing load calculation
| Limiting value |
e |
0.68
|
| Axial load factor (single, tandem) |
Y1 |
0
|
| Axial load factor (single, tandem) |
Y2 |
0.87
|
| Axial load factor (single, tandem) |
Y0 |
0.38
|
| Radial load factor (single, tandem) |
X1 |
1
|
| Radial load factor (single, tandem) |
X2 |
0.41
|
| Radial load factor (single, tandem) |
X0 |
0.5
|
| Axial load factor (back-to-back, face-to-face) |
Y1 |
0.92
|
| Axial load factor (back-to-back, face-to-face) |
Y2 |
1.4
|
| Axial load factor (back-to-back, face-to-face) |
Y0 |
0.76
|
| Radial load factor (back-to-back, face-to-face) |
X1 |
1
|
| Radial load factor (back-to-back, face-to-face) |
X2 |
0.67
|
| Radial load factor (back-to-back, face-to-face) |
X0 |
1
|
