If you're looking to shim a caster, there are a few things you'll need to keep in mind. First, you'll need to identify the type of caster you have. There are three main types of casters: threaded, expandable, and press-fit. Once you know what type of caster you have, you can proceed with finding the right shim for the job.
Threaded casters are the most common type of caster, and they're also the easiest to shim. All you need is a washer that's slightly larger than the base of the caster. Place the washer on the floor and thread the caster onto it. The washer will act as a spacer, raising the caster off the ground slightly.
Expandable casters are a bit more tricky, but the same principle applies. You'll need a washer that's slightly larger than the base of the caster, as well as a nut and bolt that are the same size. Place the washer on the floor and thread the bolt through it. Then, thread the nut onto the bolt and tighten it until the washer is expanded and the caster is raised off the ground slightly.
Press-fit casters are the most difficult type to shim, but it can be done with a little patience. You'll need a washer that's slightly larger than the base of the caster, as well as a piece of metal or hard plastic that's