S71912 ACD/HCP4A
Super-precision, high-capacity, single row angular contact ball bearing with 25° contact angle with sealsThese super-precision, high-capacity, single row angular contact ball bearings, with 25° contact angle, with seals, 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
- Non-contact seals
- Integral sealing prolongs bearing service life
Description
| Universal matching bearing(s) | No |
Dimensions
| d | 60 mm | Bore diameter |
|---|---|---|
| D | 85 mm | Outside diameter |
| B | 13 mm | Width |
| d1 | 67.7 mm | Shoulder diameter of inner ring (large side face) |
| d2 | 67.7 mm | Shoulder diameter of inner ring (small side face) |
| D2 | 79.56 mm | Recess diameter of outer ring (large side face) |
| r1,2 | min. 1 mm | Chamfer dimension |
| r3,4 | min. 0.3 mm | Chamfer dimension |
| a | 23.5 mm | Distance from side face to pressure point |
Abutment dimensions
| da | min. 64.6 mm | Diameter of shaft abutment |
|---|---|---|
| da | max. 67.1 mm | Diameter of shaft abutment |
| db | min. 64.6 mm | Diameter of shaft abutment |
| db | max. 67.1 mm | Diameter of shaft abutment |
| Da | max. 80.4 mm | Diameter of housing abutment |
| Db | max. 83 mm | Diameter of housing abutment |
| ra | max. 1 mm | Radius of fillet |
| rb | max. 0.3 mm | Radius of fillet |
Calculation data
| Basic dynamic load rating | C | 18.6 kN |
|---|---|---|
| Basic static load rating | C0 | 14.6 kN |
| Fatigue load limit | Pu | 0.45 kN |
| Attainable speed for grease lubrication | 16 000 r/min | |
| Contact angle | α | 25 ° |
| Ball diameter | Dw | 7.938 mm |
| Number of balls (per bearing) | z | 24 |
| Preload class A | GA | 120 N |
|---|---|---|
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 142 N/µm | |
| Preload class B | GB | 240 N |
| Axial stiffness for preload B (sets of two brgs back-to-back or face-to-face) | 184 N/µm | |
| Preload class C | GC | 480 N |
| Axial stiffness for preload C (sets of two brgs back-to-back or face-to-face) | 242 N/µm | |
| Preload class D | GD | 960 N |
| Axial stiffness for preload D (sets of two brgs back-to-back or face-to-face) | 324 N/µm |
| Correction factor dependent on bearing series and size | f | 1.17 |
|---|---|---|
| Correction factor dependent on contact angle | f1 | 0.98 |
| Correction factor, preload class A | f2A | 1 |
| Correction factor, preload class B | f2B | 1.07 |
| Correction factor, preload class C | f2C | 1.12 |
| Correction factor, preload class D | f2D | 1.17 |
| Correction factor for hybrid bearings | fHC | 1.04 |
| Limiting value | e | 0.68 |
| Axial load factor (single, tandem) | Y2 | 0.87 |
| Axial load factor (single, tandem) | Y0 | 0.38 |
| Radial load factor (single, tandem) | X2 | 0.41 |
| 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) | X2 | 0.67 |
Mass
| Mass | 0.17 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.
