Selecting a bearing

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)figure 8-1
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.


Bore (ds)

Measure the amount of change within the radial plane

Bore (dS) figure 8-1

Outer Diameter (Ds)

Measure the amount of change within the radial plane

Outer Diameter (DS) figure 8-2

Inner Ring Width

Measure while rotating inner ring one revolution

Inner Ring Width (BS) figure 8-3

Outer Ring Width

Measure while rotating outer ring one revolution

Outer Ring Width (CS) figure 8-4

Side Runout of Inner Ring

Read the indicator while rotating inner ring one revolution

Side Runout of Inner Ring (Sd) figure 8-5

Outside Cylindrical Surface Runout with Side

Read the indicator while rotating outer ring one revolution

Outside Cylindrical Surface Runout with Side (SD) figure 8-6

 

Radial runout of inner ring

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

Radial runout of outer ring

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

Axial runout of inner ring

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

Axial runout of outer ring

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




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