Part of my goal is to build this portable bench and toolbox at minimal cost using mostly scrap material and things I have on hand. The challenge was to come up with a lightweight but useable vise without spending anything. This is something I already know how to do based on my experience years ago making Moxon vises using bar clamps. Here is one that I kept:
It has collected dust since I made one with acme threaded rods, but now that I look at it again I am thinking it is better. It's relatively light, fast as a result of being able to move the screw arm along the bar and nice to work on because the handles are in the back. I am not sure why I mounted the rear jaw on top of the base, but I have decided to change that and go back to using it to see if I like it better.
The cool thing about using this idea on a portable workbench is that you already have the rear jaw: the bench itself. I attached some tabs on the sides of the bench to hold light duty bar clamps at the right height:
I had a nice piece of 8/4 cvg douglas-fir (save for the pitch-pocket which I epoxied) to use for the front jaw:
I wasn't sure what finish to apply to a portable bench that will be spending part of its life outdoors, but I had some old tung oil on hand and decided to use it. It seems like it might be a good choice as it didn't make the top slippery, but I have never liked the way it looks on douglas-fir. I am going to use something else on the toolbox.
At this point, the bench is done. Now it's on to the toolbox.