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Rolling bearing accuracy points (main) dimensional accuracy and rotational accuracy. The accuracy level of standardization, divided into P0 grade level P6, P5 level, P4 level, P2 grade five levels.
Successively improve accuracy from 0, 0 for general use have been sufficient, but when used as shown in Table 1, conditions or occasions need 5 or higher accuracy.
Dimensional accuracy (installed with the shaft and housing related projects)
1, an inner diameter, an outer diameter, width, and fitted with the width of the allowable deviation
2, a group of roller diameter and the diameter of the outer umbra umbra allowable deviation
3, the acceptable limit of chamfer dimension value
4, the width of the allowable fluctuation amount
Rotation accuracy (jitter related projects) with the rotating body
1, the inner ring and outer ring radial runout and axial runout
2, the inner ring to allow lateral runout
3, the outer diameter surface inclination to allow changes in the amount of
4, the thrust of the thickness of the bearing raceways allow fluctuation amount
5 allowable deviation of the tapered bore and allows changes in the amount of
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7203CTYNDBLP4 NSK | 17 | 40 | 12 |
| 7020ATYNDBLP4 NSK | 100 | 150 | 24 |