Originally Posted by
Tuomas
I didn't meant to be rude in my previous answer.
Its hard to find right words sometimes when things are said different way in my culture.
Like this vise that you posted.
Its the trheaded rod that moves, and if you don't lift it with your hand, it leans to half nut.
That would have been unwanted feature when used with a jack.
I designed mine, so that threads move inside outer "slide" and stays secured from wearing out / leaning against any surface when vise is converted to be used with a hydraulic jack. That kind of vise is great in drill press etc, but maybe not optimal design when making a vise with bigger/higher jaws?