Reply by Roger Clark aka Rex

Hey there wicked one, everything in my shop is on wheels (casters), some with fixed at one end and some with swivel all around. Some have breaks, some don’t, – depends on your required usage.
One version is what I have on my sanding table configuration – 4 swivels and 2 leveling pads.
You can use (instead of what I used) a threaded rod, wing nut and nut set in a piece of 2×4, it works just as good. As far as casters go, don’t use anything less than 3” dia, with a tire tread that is compatible with the floor surface, and get a wide a tread, not less than 1”.

Here’s one of my setups.

-- Roger-R, Republic of Texas. "Always look on the Bright Side of Life" - An eyeball to eyeball confrontation with a blind person is as complete waste of Time.