Rob,
Therein lies another story. When I was building the mount, I welded a flange that mated to the vise without it's rotating base installed. At the bottom, I mounted a flange that had 10 holes in a circle that had been tapped for 3/4 inch fine thread bolts-this flange matched exactly a flange welded to another section of hydraulic tubing that had a precision fit pin located in the center, which would give the ability to swing the vise complete with it's mount, yet, eliminate the rotating base on the vise, which, wasn't really up to the duty spec I was looking for. That was going to be mounted in the concrete in the floor of the shop-I planned on tying the structure into the existing concrete, and pouring new around it.
Well, I needed the thing before I had a hole in the shop floor and a final plan for tying it into the concrete, so the shop foreman where I worked gave me some concrete anchors that they use for keeping pallet racking, and printing equipment from moving around on concrete-they have smashed fully loaded fork lifts into them, and never torn one out. Which, is how it is mounted to this day. They look like a bolt with a threaded wedge in the bottom, and are hammered in a hole in the concrete, which leaves a threaded section out of the concrete, which a nut goes onto, pulling the wedge up into the concrete, and bolting the thing down to the floor. Much simpler than what I had planned, and I've never had the need to swing the vise anyway, a good thing, since it is now rigid to the floor.
The Wilton machinists vises are about the best-the vise bar is round, with a straight pull nut, and a keyway machined into the bottom of the bar, that eliminates side to side play on the movable jaw. Lifetime lubed and sealed, to keep crud out of the works, and a meaty anvil. Still made in USA, but, I don't know how long that will last.
Best,
Ted
