S7012 CB/P4A
Super-precision, high-speed B design, single row angular contact ball bearing with 15° contact angle with sealsThese super-precision, high-speed, single row angular contact ball bearings, with 15° contact angle, with seals, accommodate radial and axial loads acting simultaneously, where the axial load acts in one direction only. Compared to the equivalent SKF E design high-speed bearings, these are suited for lighter loads.
- Very high running accuracy
- Accommodate high speeds
- Reduced stresses on rolling contact surfaces
- Non-contact seals
- Integral sealing prolongs bearing service life
Description
| Universal matching bearing(s) | No |
Dimensions
| d | 60 mm | Bore diameter |
|---|---|---|
| D | 95 mm | Outside diameter |
| B | 18 mm | Width |
| d1 | 73.18 mm | Shoulder diameter of inner ring (large side face) |
| d2 | 71.65 mm | Shoulder diameter of inner ring (small side face) |
| D2 | 84.39 mm | Recess diameter of outer ring (large side face) |
| r1,2 | min. 1.1 mm | Chamfer dimension |
| r3,4 | min. 0.6 mm | Chamfer dimension |
| a | 19.5 mm | Distance from side face to pressure point |
Abutment dimensions
| da | min. 66 mm | Diameter of shaft abutment |
|---|---|---|
| da | max. 72.6 mm | Diameter of shaft abutment |
| db | min. 66 mm | Diameter of shaft abutment |
| db | max. 71.1 mm | Diameter of shaft abutment |
| Da | max. 89 mm | Diameter of housing abutment |
| Db | max. 91.8 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 | 14.6 kN |
|---|---|---|
| Basic static load rating | C0 | 12 kN |
| Fatigue load limit | Pu | 0.51 kN |
| Attainable speed for grease lubrication | 19 000 r/min | |
| Contact angle | α | 15 ° |
| Ball diameter | Dw | 6.747 mm |
| Number of balls (per bearing) | z | 28 |
| Preload class A | GA | 48 N |
|---|---|---|
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 41 N/µm | |
| Preload class B | GB | 96 N |
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) | 54 N/µm | |
| Preload class C | GC | 290 N |
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) | 86 N/µm |
| Correction factor dependent on bearing series and size | f | 1.06 |
|---|---|---|
| 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 for hybrid bearings | fHC | 1 |
| Calculation factor | f0 | 9.7 |
Mass
| Mass | 0.45 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
