These super-precision, high-capacity, single row angular contact ball bearings 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. Being universally matchable, they can be used together in arrangements to provide effective load sharing, within a predetermined preload range, without the use of shims or similar devices. They have two lubrication holes, an annular groove, and two annular O-ring grooves in their outer rings.
| Universal matching bearing(s) |
Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
|
| d |
220 mm
|
Bore diameter |
|---|---|---|
| D |
300 mm
|
Outside diameter |
| B |
38 mm
|
Width |
| d1 |
244.7 mm
|
Shoulder diameter of inner ring (large side face) |
| d2 |
244.7 mm
|
Shoulder diameter of inner ring (small side face) |
| D1 |
275.3 mm
|
Shoulder diameter of outer ring (large side face) |
| b |
3.5 mm
|
Width of lubrication groove |
| C1 |
20.9 mm
|
Distance from outer ring side face to lubrication groove / lubrication hole |
| C2 |
7.1 mm
|
Distance from outer ring side face to O-ring groove |
| C3 |
5.45 mm
|
Distance from outer ring side face to O-ring groove |
| r1,2 |
min. 2.1 mm
|
Chamfer dimension |
| r3,4 |
min. 1 mm
|
Chamfer dimension |
| a |
79.9 mm
|
Distance from side face to pressure point |
| da |
min. 231 mm
|
Diameter of shaft abutment |
|---|---|---|
| db |
min. 231 mm
|
Diameter of shaft abutment |
| Da |
max. 289 mm
|
Diameter of housing abutment |
| Db |
max. 295 mm
|
Diameter of housing abutment |
| ra |
max. 2 mm
|
Radius of fillet |
| rb |
max. 1 mm
|
Radius of fillet |
| Basic dynamic load rating | C |
208 kN
|
|---|---|---|
| Basic static load rating | C0 |
285 kN
|
| Fatigue load limit | Pu |
7.5 kN
|
| Attainable speeds |
Contact SKF for the attainable speeds
|
|
| Contact angle | α |
25 °
|
| Ball diameter | Dw |
25.4 mm
|
| Number of rows | i |
1
|
| Number of balls (per bearing) | z |
29
|
| Reference grease quantity (per bearing) | Gref |
84 cm³
|
| Preload class |
A
|
|
| Preload when unmounted | G |
1 300 N
|
| Axial stiffness |
533 N/µm
|
| Correction factor dependent on bearing series and size | f |
1.28
|
|---|---|---|
| Correction factor dependent on contact angle | f1 |
0.98
|
| Correction factor, preload class A | f2A |
1
|
| 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 |
6.6 kg
|
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