S7004 CEGA/P4A
Super-precision, high speed, E design, universally matchable single row angular contact ball bearing with seals
These super-precision, high-speed, E design, single row angular contact ball bearings, with non-contact seals, 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, without the use of shims or similar devices.
- Very high running accuracy
- Accomodate very high speeds
- Universally matchable
- Non-contact seals
- Integral sealing prolongs bearing service life
Dimensions
| d |
20 mm
|
Bore diameter |
| D |
42 mm
|
Outside diameter |
| B |
12 mm
|
Width |
| d1 |
26.6 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
24.8 mm
|
Shoulder diameter of inner ring (small side face) |
| D2 |
36.5 mm
|
Recess diameter of outer ring (large side face) |
| r1,2 |
min.0.6 mm
|
Chamfer dimension |
| r3,4 |
min.0.3 mm
|
Chamfer dimension |
| a |
10.2 mm
|
Distance from side face to pressure point |
Abutment dimensions
| da |
min.22 mm
|
Diameter of shaft abutment |
| da |
max.26.2 mm
|
Diameter of shaft abutment |
| db |
min.22 mm
|
Diameter of shaft abutment |
| db |
max.24.4 mm
|
Diameter of shaft abutment |
| Da |
max.40 mm
|
Diameter of housing abutment |
| Db |
max.39.6 mm
|
Diameter of housing abutment |
| ra |
max.0.6 mm
|
Radius of fillet |
| rb |
max.0.3 mm
|
Radius of fillet |
Calculation data
| Basic dynamic load rating |
C |
7.41 kN
|
| Basic static load rating |
C0 |
3.35 kN
|
| Fatigue load limit |
Pu |
0.143 kN
|
| Attainable speed for grease lubrication |
|
To be calculated: Single bearing (54000) x speed reduction factor (see table below)
|
| Attainable speed for oil-air lubrication |
|
To be calculated: Single bearing () x speed reduction factor (see table below)
|
| Contact angle |
α |
15 °
|
| Ball diameter |
Dw |
6.35 mm
|
| Number of rows |
i |
1
|
| Number of balls (per bearing) |
z |
12
|
Preload and stiffness (back-to-back, face-to-face)
| Preload class |
|
A
|
| Preload when unmounted |
G |
40 N
|
| Axial stiffness |
|
21 N/µm
|
Correction factors for preload calculation
| Correction factor dependent on bearing series and size |
f |
1.04
|
| Correction factor dependent on contact angle |
f1 |
1
|
| Correction factor, preload class A |
f2A |
1
|
| Correction factor for hybrid bearings |
fHC |
1
|
Factors for equivalent bearing load calculation
| Calculation factor for equivalent loads |
f0 |
7.2
|
| Additional factors for equivalent loads |
|
Refer to Notes 1 and 2 below
|
| Axial load factor (back-to-back, face-to-face) |
Y0 |
0.92
|
| Radial load factor (back-to-back, face-to-face) |
X1 |
1
|
| Radial load factor (back-to-back, face-to-face) |
X2 |
0.72
|
| Radial load factor (back-to-back, face-to-face) |
X0 |
1
|
