The general principles for verifying the dimensions and runout of rolling ball bearings are specified in JIS B 1515-2.
The overview of the method of measuring the actual dimensions and runout is shown below.
Dimensions related
| 1. Actual bore diameter (ds) | Fig. 8-1 |
| 2. Actual outer diameter (Ds) | Fig. 8-2 |
| 3. Actual inner ring width (Bs) | Fig. 8-3 |
| 4. Actual outer ring width (Cs) | Fig. 8-4 |
Runout related
| 1. Perpendicularity of inner ring side surface with respect to the inner diameter axis (Sd) | Fig. 8-5 |
| 2. Perpendicularity of outer ring outer diameter surface with respect to the side surface (SD) | Fig. 8-6 |
| 3. Radial runout of inner ring (Kia) | Fig. 8-7 |
| 4. Radial runout of outer ring (Kea) | Fig. 8-8 |
| 5. Axial runout of inner ring (Sia) | Fig. 8-9 |
| 6. Axial runout of outer ring (Sea) | Fig. 8-10 |
Remark: [ ] is the expression in previous JIS.
Measure at different angles in the radial plane.
Bore diameter (ds)
Fig. 8-1
Measure at different angles in the radial plane.
Outer diameter (Ds)
Fig. 8-2
Turn the inner ring once and measure.
Inner ring width (Bs)
Fig. 8-3
Turn the outer ring once and measure.
Outer ring width (Cs)
Fig. 8-4
Read the indicator while rotating the inner ring once.
Perpendicularity of the inner ring side (Sd)
Fig. 8-5
Read the indicator while rotating the outer ring once.
Perpendicularity of the outer ring outer diameter surface (SD)
Fig. 8-6
Apply a load to the inner ring and read the indicator while rotating once.
Radial runout of inner ring (Kia)
Fig. 8-7
Apply a load to the outer ring and read the indicator while rotating once.
Radial runout of outer ring (Kea)
Fig. 8-8
Apply a load to the inner ring and read the indicator while rotating once.
Axial runout of inner ring (Sia)
Fig. 8-9
Apply a load to the outer ring and read the indicator while rotating once.
Axial runout of outer ring (Sea)
Fig. 8-10