I built a pair of new workbenches for my CNC and drill press, and used these casters:
https://www.amazon.com/gp/product/B07F13XJG3
They’re quite heavy-duty, and the screw foot allows them to become stationary (and leveled).
The ones I got use M12 x 1.75 thread, which conveniently matched the pre-formed 10.5mm holes in the aluminum extrusion I used for my workbench - I just had to tap them for that thread.
