7040 CD/P4A
Super-precision, high-capacity, single row angular contact ball bearing with 15° contact angleThese super-precision, high-capacity, single row angular contact ball bearings, with 15° 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
Description
| Universal matching bearing(s) | No |
Dimensions
| d | 200 mm | Bore diameter |
|---|---|---|
| D | 310 mm | Outside diameter |
| B | 51 mm | Width |
| d1 | 233.9 mm | Shoulder diameter of inner ring (large side face) |
| d2 | 233.9 mm | Shoulder diameter of inner ring (small side face) |
| D1 | 276.1 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 | 59.8 mm | Distance from side face to pressure point |
Abutment dimensions
| da | min. 211 mm | Diameter of shaft abutment |
|---|---|---|
| db | min. 211 mm | Diameter of shaft abutment |
| Da | max. 299 mm | Diameter of housing abutment |
| Db | max. 304 mm | Diameter of housing abutment |
| ra | max. 2 mm | Radius of fillet |
| rb | max. 1 mm | Radius of fillet |
| dn | 243.2 mm | Position of oil nozzle |
Calculation data
| Basic dynamic load rating | C | 296 kN |
|---|---|---|
| Basic static load rating | C0 | 390 kN |
| Fatigue load limit | Pu | 10.2 kN |
| Attainable speed for grease lubrication | 4 500 r/min | |
| Attainable speed for oil-air lubrication | 6 700 r/min | |
| Contact angle | α | 15 ° |
| Ball diameter | Dw | 34.925 mm |
| Number of balls (per bearing) | z | 21 |
| Reference grease quantity (per bearing) | Gref | 153 cm³ |
| Preload class A | GA | 1 100 N |
|---|---|---|
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 208 N/µm | |
| Preload class B | GB | 2 200 N |
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) | 280 N/µm | |
| Preload class C | GC | 4 400 N |
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) | 389 N/µm | |
| Preload class D | GD | 8 800 N |
| Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face) | 556 N/µm |
| Correction factor dependent on bearing series and size | f | 1.14 |
|---|---|---|
| Correction factor dependent on contact angle | f1 | 1 |
| Correction factor, preload class A | f2A | 1 |
| Correction factor, preload class B | f2B | 1.02 |
| Correction factor, preload class C | f2C | 1.05 |
| Correction factor, preload class D | f2D | 1.09 |
| Correction factor for hybrid bearings | fHC | 1 |
| Calculation factor | f0 | 15.6 |
Mass
| Mass | 12.3 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
