Rolling bearing rotation accuracy

The rotation accuracy of rolling bearings refers to:

1. Radial runout of the inner and outer rings of complete sets of bearings;

2. The end faces of the inner ring and outer ring of the complete set of bearings run out of the raceway;

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

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

5. The variation of the thickness of the bottom surface of the thrust bearing raceway.

Symbols and definitions:

1. Radial runout of bearings

Kia - the radial runout of the inner ring of a complete set of bearings, which refers to the difference between the maximum and minimum distance between the inner diameter surface and a fixed point of the relative outer ring when the inner ring is at different angular positions;

Kea - the radial runout of the outer ring of a complete set of bearings, which refers to the difference between the maximum and minimum distances between the outer diameter surface and a fixed point relative to 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 inner ring end face of the complete set of bearings against the raceway, which refers to the reference end face of the inner ring at a point where the radial distance from the inner ring axis is equal to half the contact diameter of the inner ring raceway when the inner ring is at different angular positions. The difference between the maximum and minimum axial distance between a fixed point relative to the outer ring.

Sea - the runout of the outer ring end face of the raceway of a complete set of bearings, which refers to the reference end face of the outer ring at a point where the radial distance from the axis center line of the outer ring is equal to half the contact diameter of the outer ring raceway when the outer ring is at different angular positions. and the difference between the maximum and minimum axial distance between a fixed point relative to the inner ring.

3. The runout of the inner diameter of the reference end face of the bearing inner ring

Sd——The runout of the inner ring reference end face on the inner diameter, which refers to the distance between the radial distance from the inner ring axis line and half of the raceway contact diameter, and the distance between the plane perpendicular to the ferrule axis line and the ferrule reference end face. The difference between the maximum and minimum axial distance.

4. Changes in the inclination of the bearing outer surface busbar to the reference end face

SD——The amount of change in the inclination of the outer surface generatrix to the reference end face, which refers to the limit length of the outer diameter surface (excluding the maximum axial chamfer size at both ends) in the radial plane parallel to the tangent plane of the outer ring reference end face. , the total change in the relative position of each point on the same bus.

5. The variation of the shaft ring and seat ring raceway to the thickness of the bottom surface

Si——The variation of the thickness of the shaft ring raceway to the bottom surface, which refers to the difference between the maximum and minimum axial distance between the bottom surface of the shaft ring and the middle of the opposite raceway.

Se - the change in thickness of the seat ring raceway to the bottom surface, refers to the difference between the maximum and minimum axial distance between the bottom surface of the seat ring and the middle of the opposite raceway.