Description
SKF 7204 ACD/HCP4A
| Universal mating bearings |
not
|
size
| d |
20 mm
|
aperture |
|---|---|---|
| D |
47 mm
|
Outside diameter |
| B |
14 mm
|
width |
| d1 |
29.1 mm
|
Inner ring flange diameter (large end) |
| d2 |
29.1 mm
|
Inner ring flange diameter (small end face) |
| D1 |
38.7 mm
|
Outer ring flange diameter (large end) |
| r1,2 |
min.1 mm
|
Chamfer size |
| r3,4 |
min.0.3 mm
|
Chamfer size |
| a |
15 mm
|
The distance from the end face to the pressure point |
Shoulder size
| da |
min.25.6 mm
|
Shaft shoulder diameter |
|---|---|---|
| db |
min.25.6 mm
|
Shaft shoulder diameter |
| Da |
max.41.4 mm
|
Housing shoulder diameter |
| Db |
max.44.6 mm
|
Housing shoulder diameter |
| ra |
max.1 mm
|
Fillet radius |
| rb |
max.0.3 mm
|
Fillet radius |
| dn |
31.1 mm
|
Injector location |
Data calculations
| Basic dynamic load rating | C |
11.4 kN
|
|---|---|---|
| Basic static load rating | C0 |
5.6 kN
|
| Fatigue load limits | Pu |
0.173 kN
|
| The permissible speed at which the grease lubricates |
38 000 r/min
|
|
| The permissible speed of air-air lubrication |
56 000 r/min
|
|
| Contact angle | α |
25 °
|
| Ball diameter | Dw |
7.938 mm
|
| Number of columns | i |
1
|
| Number of balls (per bearing) | z |
11
|
| Reference grease volume (per bearing) | Gref |
1.539 cm³
|
| Class A preload | GA |
70 N
|
|---|---|---|
| Class A preload axial stiffness (two bearings back-to-back or face-to-face configuration) |
68 N/µm
|
|
| Class B preload | GB |
140 N
|
| Preload Class B axial stiffness (two bearings back-to-back or face-to-face configuration) |
87 N/µm
|
|
| Class C preload | GC |
280 N
|
| Preload Class C Axial stiffness (two bearings back-to-back or face-to-face configuration) |
113 N/µm
|
|
| Class D preload | GD |
560 N
|
| Preload Class D Axial stiffness (two bearings back-to-back or face-to-face configuration) |
149 N/µm
|
| The correction factor depends on the bearing series and size | f |
1.03
|
|---|---|---|
| The correction factor depends on the angle of contact | f1 |
0.99
|
| preload grade A correction factor, | f2A |
1
|
| Preload class B correction factor | f2B |
1.01
|
| Preload C-level correction factor | f2C |
1.03
|
| Preload grade D correction factor | f2D |
1.06
|
| Correction factor for hybrid bearings | fHC |
1.01
|
| Limit values | e |
0.68
|
|---|---|---|
| Axial load factor (single row or tandem configuration) | Y2 |
0.87
|
| Axial load factor (single row or tandem configuration) | Y0 |
0.38
|
| Axial load factor (single row or tandem configuration) | X2 |
0.41
|
| Axial load factor (back-to-back or face-to-face configuration) | Y1 |
0.92
|
| Axial load factor (back-to-back or face-to-face configuration) | Y2 |
1.41
|
| Axial load factor (back-to-back or face-to-face configuration) | Y0 |
0.76
|
| Radial load factor (back-to-back or face-to-face configuration) | X2 |
0.67
|
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