7224 ACD/HCP4A
Super-precision, high-capacity, single row angular contact ball bearing
These super-precision, high-capacity, single row angular contact ball bearings, with 25° contact angle, 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.
Very high running accuracy
Very high load carrying capacity
Relatively high speed and stiffness
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Product Introduction
Dimensions
| d |
120 mm |
Bore diameter |
|---|---|---|
| D |
215 mm |
Outside diameter |
| B |
40 mm |
Width |
| d1 |
150.3 mm |
Shoulder diameter of inner ring (large side face) |
| d2 |
150.3 mm |
Shoulder diameter of inner ring (small side face) |
| D1 |
186.7 mm |
Shoulder diameter of outer ring (large side face) |
| r1,2 |
min.2.1 mm |
Chamfer dimension |
| r3,4 |
min.1.1 mm |
Chamfer dimension |
| a |
59.6 mm |
Distance from side face to pressure point |
Abutment dimensions
| da |
min.132 mm |
Diameter of shaft abutment |
|---|---|---|
| db |
min.132 mm |
Diameter of shaft abutment |
| Da |
max.203 mm |
Diameter of housing abutment |
| Db |
max.208 mm |
Diameter of housing abutment |
| ra |
max.2 mm |
Radius of fillet |
| rb |
max.1 mm |
Radius of fillet |
| dn |
158.2 mm |
Position of oil nozzle |
Calculation data
| Basic dynamic load rating | C |
190 kN |
|---|---|---|
| Basic static load rating | C0 |
183 kN |
| Fatigue load limit | Pu |
4.4 kN |
| Attainable speed for grease lubrication |
7 000 r/min |
|
| Attainable speed for oil-air lubrication |
11 000 r/min |
|
| Contact angle | α |
25 ° |
| Ball diameter | Dw |
30.162 mm |
| Number of rows | i |
1 |
| Number of balls (per bearing) | z |
15 |
| Reference grease quantity (per bearing) | Gref |
69.084 cm³ |
| Preload, class A | GA |
1 200 N |
|---|---|---|
| Axial stiffnes for preload A (sets of two brgs back to back or face to face) |
375 N/µm |
|
| Preload, class B | GB |
2 400 N |
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) |
488 N/µm |
|
| Preload, class C | GC |
4 800 N |
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) |
643 N/µm |
|
| Preload, class D | GD |
9 600 N |
| Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face) |
862 N/µm |
| Correction factor dependent on bearing series and size | f |
1.08 |
|---|---|---|
| Correction factor dependent on contact angle | f1 |
0.99 |
| Correction factor, preload class A | f2A |
1 |
| Correction factor, preload class B | f2B |
1.01 |
| Correction factor, preload class C | f2C |
1.03 |
| Correction factor, preload class D | f2D |
1.06 |
| Correction factor for hybrid bearings | fHC |
1.01 |
| Limiting value | e |
0.68 |
|---|---|---|
| Axial load factor (single, tandem) | Y2 |
0.87 |
| Axial load factor (single, tandem) | Y0 |
0.38 |
| Radial load factor (single, tandem) | X2 |
0.41 |
| Axial load factor (back-to-back, face-to-face) | Y1 |
0.92 |
| Axial load factor (back-to-back, face-to-face) | Y2 |
1.41 |
| Axial load factor (back-to-back, face-to-face) | Y0 |
0.76 |
| Radial load factor (back-to-back, face-to-face) | X2 |
0.67 |
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