I think Ive seen them referred to as "skate bearings", they are the metal wheels with I suspect ball bearing hubs used for the axis slide.
I am still new, so I hope I am using "proper" terminology and names.
Where can I get them, cheap?
I am building a home unit for hobby & fun, will be etching light stuff, and hopefully isolation milling of PCBs, and possibly plotting directly on a copper clad board with a resist pen to make Printed Circuit Boards.
Thanks,
Andrew