# How do I know what size ball bearings I need?

There are a few different ways to figure out what size ball bearings you need. One way is to measure the ball bearing itself. Another way is to measure the inner and outer diameters of the ball bearing’s housing.

If you’re measuring the ball bearing itself, you’ll need to know the ball bearing’s diameter. You can find this measurement in millimetres (mm) or inches (in). A ball bearing measured in mm is often described as a metric ball bearing while a ball bearing measured in inches is an imperial ball bearing. Once you have the ball bearing’s diameter, you can use a ball bearing size chart to determine what size ball bearings you need.

If you’re measuring the inner and outer diameters of the ball bearing’s housing, you’ll need to know the ball bearing’s bore diameter and outside diameter. The bore diameter is the measurement of the ball bearing’s housing’s inner diameter while the outside diameter is the measurement of the ball bearing’s housing’s outer diameter. You can use a ball bearing size chart to determine what size ball bearings you need based on these two measurements.

## Referring to a ball bearing size chart

When using a ball bearing size chart, it’s important to make sure you’re using the right measurements. Make sure you’re using the ball bearing’s diameter if you’re measuring the ball bearing itself or make sure you’re using the ball bearing’s bore diameter and outside diameter if you’re measuring the ball bearing’s housing. Once you have the correct measurement, find it on the ball bearing size chart. The ball bearing size chart will list the ball bearing’s dimensions and what size ball bearings you need.

Keep in mind that there are different types of ball bearings, so make sure you’re using the right ball bearing size chart for the type of ball bearing you have. For example, there are deep-groove ball bearings, thrust ball bearings, angular contact ball bearings, and more.

For those who are still unsure about the right size of ball bearings for the intended application, it may be helpful to speak with a qualified provider who will be able to assist you in finding the right ball bearing for your requirements.