Rotational accuracy of rolling bearings

Rotational accuracy of rolling bearings refers to:

1. Radial runout of the inner ring and outer ring of the bearings;

2.The runout of bearing inner ring and outer ring end face to the raceway;

3. The runout of the inner ring datum end face to the inner diameter;

4. The amount of change of the outer surface line to the inclination of the datum end face;

5.The amount of change of the thrust bearing raceway to the bottom thickness.
Symbols and definitions:
1.The radial runout of the bearing: Kia-The radial runout of the inner ring of the bearings. It means the difference between the maximum and minimum distance between the inner diameter surface and the fixed point of the outer ring when the inner ring is at different angular positions; Kea-The radial runout of the outer ring of the bearings. It refers to the difference between the maximum and minimum distances between the outer diameter surface and the fixed point of the inner ring when the outer ring is at different angular positions.
2. The runout of the bearing end face to the raceway
Sia - The runout of the bearing inner ring end face to the raceway. It means the maximum and minimum axial distances between the datum end face of the inner ring and the fixed point  of the outer ring when the inner ring is at different angular positions.
Sea-The runout of the bearing outer ring end face to the raceway. It means the maximum and minimum axial distances between the datum end face of the outer ring and the fixed point of the inner ring when the outer ring is at different angular positions.
3. Sd - The runout of the datum end of the bearing inner ring against the inner diameter.