7008 CE/P4ADT
Matched set of two super-precision, high-speed E design, single row angular contact ball bearings
These matched sets of two super-precision, high-speed, E design, single row angular contact ball bearings are available in a variety of arrangements.
Compared to the equivalent SKF B design high-speed bearings, these have a slightly higher speed capability and can accommodate heavier loads.
- Very high running accuracy
- Accommodate very high speeds
Dimensions
| d |
40 mm
|
Bore diameter |
| D |
68 mm
|
Outside diameter |
| B |
30 mm
|
Width |
| d1 |
49.7 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
47.6 mm
|
Shoulder diameter of inner ring (small side face) |
| D1 |
58.25 mm
|
Shoulder diameter of outer ring (large side face) |
| r1,2 |
min.1 mm
|
Chamfer dimension |
| r3,4 |
min.0.6 mm
|
Chamfer dimension |
Abutment dimensions
| da |
min.44.6 mm
|
Diameter of shaft abutment |
| db |
min.44.6 mm
|
Diameter of shaft abutment |
| Da |
max.63.4 mm
|
Diameter of housing abutment |
| Db |
max.63.8 mm
|
Diameter of housing abutment |
| ra |
max.1 mm
|
Radius of fillet |
| rb |
max.0.6 mm
|
Radius of fillet |
| dn |
51.6 mm
|
Position of oil nozzle |
Calculation data
| Basic dynamic load rating |
C |
19.9 kN
|
| Basic static load rating |
C0 |
15.3 kN
|
| Fatigue load limit |
Pu |
0.64 kN
|
| Attainable speed for grease lubrication |
|
To be calculated: Single bearing (30000) x speed reduction factor (see table below)
|
| Attainable speed for oil-air lubrication |
|
To be calculated: Single bearing (45000) x speed reduction factor (see table below)
|
| Contact angle |
α |
15 °
|
| Ball diameter |
Dw |
7.144 mm
|
| Number of rows |
i |
2
|
| Number of balls (per bearing) |
z |
19
|
| Reference grease quantity (per bearing) |
Gref |
2.8 cm³
|
Correction factors for preload calculation
| Correction factor dependent on bearing series and size |
f |
1.06
|
| Correction factor dependent on contact angle |
f1 |
1
|
| Correction factor for hybrid bearings |
fHC |
1
|
Factors for equivalent bearing load calculation
| Calculation factor for equivalent loads |
f0 |
8.1
|
