Measurement Methods

Measurement methods of a ball bearing is specified by JIS B1515. Please refer to the summary below.
Dimensional Accuracy
1.Bearing Bore (d)
2.Bearing Outside Diameter (D)
3.Inner Ring Width (B)
4.Outer Ring Width (C)
Rotational Accuracy
1.Side Runout of Inner Ring (Sd)
2.Side Runout of Outer Ring (SD)
3.Radial Runout of Inner Ring (Kia)
4.Radial Runout of Outer Ring (Kea)
5.Axial Runout of Inner Ring (Sia)
6.Axial Runout of Outer Ring (Sea)
(Please place the mouse cursor over each item to show a diagram)