Miniature & Small ball bearings -8. Measurement methods
General rules regarding verifying ball bearing dimensions and runout are specified in JIS B 1515-2. Please refer to below for the dimensions and measurement methods of runout.
Dimensions
| 1. Bore (ds) | figure8-1 |
| 2. Outer Diameter (Ds) | figure 8-2 |
| 3. Inner Ring Width (Bs) | figure 8-3 |
| 4. Outer Ring Width (Cs) | figure 8-4 |
Runout
| 1. Side Runout of Inner Ring (Sd) | figure 8-5 |
| 2. Outside Cylindrical Surface Runout with Side (SD) | figure 8-6 |
| 3. Radial Runout of Inner Ring (Kia) | figure 8-7 |
| 4. Radial Runout of Outer Ring (Kea) | figure 8-8 |
| 5. Axial Runout of Inner Ring (Sia) | figure 8-9 |
| 6. Axial Runout of Outer Ring (Sea) | figure 8-10 |
Remark: [ ] is the expression in previous JIS.
-
Measure the amount of change
within the radial plane
Bore (dS)
figure 8-1
-
Measure the amount of change
within the radial plane
Outer Diameter (DS)
figure 8-2
-
Measure while rotating inner ring
one revolution
Inner Ring Width (BS)
figure 8-3
-
Measure while rotating outer ring
one revolution
Outer Ring Width (CS)
figure 8-4
-
Read the indicator while rotating inner ring one revolution
Side Runout of Inner Ring (Sd)
figure 8-5
-
Read the indicator while rotating outer ring
one revolution
Outside Cylindrical Surface Runout with Side (SD)
figure 8-6
-
Read the indicator while rotating inner ring one revolution with dead weight placed on inner ring
Radial runout of inner ring (Kia)
figure 8-7
-
Read the indicator while rotating outer ring one revolution with dead weight placed on outer ring
Radial runout of outer ring (Kea)
figure 8-8
-
Read the indicator while rotating inner ring one revolution with dead weight placed on inner ring
Axial runout of inner ring (Sia)
figure 8-9
-
Read the indicator while rotating outer ring one revolution with dead weight placed on outer ring
Axial runout of outer ring (Sea)
figure 8-10
