"Trevor Jones" wrote: or were restrained by the item that they were
moving, as in, it only has so much room to move.

It seems a dumb idea, to me, to build a mechanism that will come apart if not stopped before the end of it's travel.
^^^^^^^^^^^^^^^^^^
That's the thing Andy A was referring to. If a cylinder was restrained by the thing it was bolted to, and was then removed and sold on e-bay, the buyer could accidentally drive it apart and spill oil all over.