How to Measure a Standard Bearing?
If there are no part numbers on a bearing or they have worn off it can be hard to identify.
There are 3 main sizes you would measure when trying to identify a bearing. The Inside Diameter (ID), the Outside Diameter (OD) and the Width. The most accurate device you can use is a Vernier (As shown in the below image).
Bearings can come in both Metric & Imperial Sizes so be sure to check this.
Inside Diameter
![How to Measure STD Bearing Inside Diameter?](/img/data-sheets/thumb/2.jpg)
May also be known as Shaft or Bore.
Outside Diameter
![How to Measure STD Bearing Outside Diameter?](/img/data-sheets/thumb/3.jpg)
Width
![How to Measure STD Bearing Widthr?](/img/data-sheets/thumb/4.jpg)