7020 ACEGA/HCP4A
Super-precision, high-speed E design, universally matchable single row angular contact ball bearing
These super-precision, high-speed, E design, 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 for high-speed operation and, compared to SKF B design high-speed bearings, have a slightly higher speed capability and can accommodate heavier loads. 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
- Accommodate very high speeds
- Universally matchable
Dimensions
| d |
100 mm
|
Bore diameter |
| D |
150 mm
|
Outside diameter |
| B |
24 mm
|
Width |
| d1 |
117.38 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
114.2 mm
|
Shoulder diameter of inner ring (small side face) |
| D1 |
132.61 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 |
41.4 mm
|
Distance from side face to pressure point |
Abutment dimensions
| da |
min.107 mm
|
Diameter of shaft abutment |
| db |
min.107 mm
|
Diameter of shaft abutment |
| Da |
max.143 mm
|
Diameter of housing abutment |
| Db |
max.144.4 mm
|
Diameter of housing abutment |
| ra |
max.1.5 mm
|
Radius of fillet |
| rb |
max.1 mm
|
Radius of fillet |
| dn |
120.4 mm
|
Position of oil nozzle |
Calculation data
| Basic dynamic load rating |
C |
42.3 kN
|
| Basic static load rating |
C0 |
38 kN
|
| Fatigue load limit |
Pu |
1.04 kN
|
| Attainable speed for grease lubrication |
|
To be calculated: Single bearing (12700) x speed reduction factor (see table below)
|
| Attainable speed for oil-air lubrication |
|
To be calculated: Single bearing (20000) x speed reduction factor (see table below)
|
| Contact angle |
α |
25 °
|
| Ball diameter |
Dw |
12.7 mm
|
| Number of rows |
i |
1
|
| Number of balls (per bearing) |
z |
27
|
| Reference grease quantity (per bearing) |
Gref |
17 cm³
|
Preload and stiffness (back-to-back, face-to-face)
| Preload class |
|
A
|
| Preload when unmounted |
G |
390 N
|
| Axial stiffness |
|
245 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 A |
f2A |
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
|
