S7009 ACEGA/P4A
Super-precision, high speed, E design, universally matchable single row angular contact ball bearing with sealsThese super-precision, high-speed, E design, single row angular contact ball bearings, with non-contact seals, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. They are designed for high-speed operation and, compared to SKF B design high-speed bearings, have a slightly higher speed capability and can accommodate heavier loads. Being universally matchable, they can be used together in arrangements to provide effective load sharing, without the use of shims or similar devices.
- Very high running accuracy
- Accomodate very high speeds
- Universally matchable
- Non-contact seals
- Integral sealing prolongs bearing service life
Description
| Universal matching bearing(s) | Yes, back-to-back (<>), face-to-face (><) or tandem (>>) |
Dimensions
| d | 45 mm | Bore diameter |
|---|---|---|
| D | 75 mm | Outside diameter |
| B | 16 mm | Width |
| d1 | 55.7 mm | Shoulder diameter of inner ring (large side face) |
| d2 | 53.6 mm | Shoulder diameter of inner ring (small side face) |
| D2 | 66.85 mm | Recess diameter of outer ring (large side face) |
| r1,2 | min. 1 mm | Chamfer dimension |
| r3,4 | min. 0.6 mm | Chamfer dimension |
| a | 22.2 mm | Distance from side face to pressure point |
Abutment dimensions
| da | min. 49.6 mm | Diameter of shaft abutment |
|---|---|---|
| da | max. 55.1 mm | Diameter of shaft abutment |
| db | min. 49.6 mm | Diameter of shaft abutment |
| db | max. 53 mm | Diameter of shaft abutment |
| Da | max. 70.4 mm | Diameter of housing abutment |
| Db | max. 70.8 mm | Diameter of housing abutment |
| ra | max. 1 mm | Radius of fillet |
| rb | max. 0.6 mm | Radius of fillet |
Calculation data
| Basic dynamic load rating | C | 12.1 kN |
|---|---|---|
| Basic static load rating | C0 | 8.15 kN |
| Fatigue load limit | Pu | 0.345 kN |
| Contact angle | α | 25 ° |
| Ball diameter | Dw | 7.144 mm |
| Number of balls (per bearing) | z | 21 |
| Preload class A | GA | 110 N |
|---|---|---|
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 94 N/µm |
| Correction factor dependent on bearing series and size | f | 1.06 |
|---|---|---|
| Correction factor dependent on contact angle | f1 | 0.99 |
| 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
| Mass | 0.25 kg |
Tolerances and clearances
Product details
- Tolerances: P4A, P4B, P4, PA9A, P2
- Clamping and fitting forces: D design, E design, B design
- Designation suffixes H, H1, L and L1 identify variants for direct oil-air lubrication.
Principles of bearing selection and application
- Chamfer dimensions
- Seat tolerances for standard conditions: shafts, housings
- Values for ISO tolerance classes: shafts, housings
- Speed dependent initial grease fill → Initial grease fill
