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Will produce localized permanent deformation of the rolling element and raceway between the bearings received big load, or a larger impact load. This amount of deformation is proportional to the load of exposure exceeds a certain limit, it will affect the bearing to rotate smoothly. The so-called basic static load rating, withstand the maximum stress in the rolling element and raceway contact area in the middle, resulting in the following calculation of contact stress static load.
Aligning ball bearings 4600MPa {469kgf/mm2}
Other ball bearings 4200MPa {428kgf/mm2}
Roller bearings 4000MPa {408kgf/mm2}
Withstand this contact stress in the contact zone, the amount of permanent deformation of the rolling element and raceway and permanent deformation, which is about 0.0001 times the diameter of the rolling element. The basic static load rating C. Value Cor bearing type, radial bearings thrust bearing Coa, respectively, recorded in the bearing dimensions table. Moreover, with the ISO specifications, the basic static load rating standard change, ball bearings, a new CO value is adjusted to 0.8 to 1.3 times, the roller bearings is about 1.4 to 1.9 times, in order to static load factor fs value has changed, I pay attention to.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7220ATYNP5 NSK | 100 | 180 | 34 |
| 7220A5TYNP5 NSK | 100 | 180 | 34 |