These sets of four matched super-precision angular contact ball bearings are available as universally matchable bearings or in preconfigured arrangements. Sets of four bearings arranged in tandem need to be mounted against a single bearing, or a set of bearings in tandem, to achieve the desired preload. All the other arrangements are available in different preload classes and correct mounting results in preload within a predetermined range, without the need for shims or similar devices. The bore and outside diameters of the bearings are matched to within a maximum of one-third of the permitted diameter tolerance, to provide better load distribution than single universally matchable bearings.
| Universal matching bearing(s) |
Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
|
| d |
140 mm
|
Bore diameter |
|---|---|---|
| D |
210 mm
|
Outside diameter |
| B |
33 mm
|
Width |
| B |
132 mm
|
Width |
| d1 |
161.6 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
161.6 mm
|
Shoulder diameter of inner ring (small side face) |
| D1 |
188.4 mm
|
Shoulder diameter of outer ring (large side face) |
| r1,2 |
min. 2 mm
|
Chamfer dimension |
| r3,4 |
min. 1 mm
|
Chamfer dimension |
| a |
57.5 mm
|
Distance from side face to pressure point |
| da |
min. 149 mm
|
Diameter of shaft abutment |
|---|---|---|
| db |
min. 149 mm
|
Diameter of shaft abutment |
| Da |
max. 201 mm
|
Diameter of housing abutment |
| Db |
max. 205 mm
|
Diameter of housing abutment |
| ra |
max. 2 mm
|
Radius of fillet |
| rb |
max. 1 mm
|
Radius of fillet |
| dn |
166.3 mm
|
Position of oil nozzle |
| Basic dynamic load rating | C |
377 kN
|
|---|---|---|
| Basic dynamic load rating | C |
377 000 N
|
| Basic static load rating | C0 |
630 kN
|
| Basic static load rating | C0 |
630 000 N
|
| Fatigue load limit | Pu |
20.4 kN
|
| Fatigue load limit | Pu |
20 400 N
|
| Attainable speeds |
Contact SKF for the attainable speeds
|
|
| Contact angle | α |
25 °
|
| Ball diameter | Dw |
22.225 mm
|
| Number of rows | i |
4
|
| Number of rows | i |
4
|
| Number of balls (per bearing) | z |
22
|
| Reference grease quantity (per bearing) | Gref |
45 cm³
|
| Preload class |
B
|
|
| Preload and stiffness |
Preload and stiffness depend on final arrangement. Contact SKF
|
| Correction factor dependent on bearing series and size | f |
1.16
|
|---|---|---|
| Correction factor dependent on contact angle | f1 |
0.99
|
| Correction factor, preload class B | f2B |
1.02
|
| Correction factor for hybrid bearings | fHC |
1
|
| 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 |
1.41
|
| 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
|
| Mass |
3.42 kg
|
| Mass |
13.7 kg
|
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