Hi guys-
I was just telling Bob K. that I really didn't expect too much of a response to this... so you guys kind'a threw me for a loop, LOL.
So... I am going to be making some (just don't have an exact time frame yet

).
Right now my plan is to make some that are the same size as the one in the video, and also some that will hold a bigger blade. The bigger version would be more of a "one size fits all" type of affair, but will
have to cost more and be bigger than many folks would need. It's goofy how much cost difference there is between 2" and 2-1/2" square tubing. :foot:
I want to build some with a bolt, and some with the adjustable lever bolts... as that will help with cost too. I'll just keep them all the same thread size.
So at this point, I've just got a few hang-ups before I can really get on this--- got a couple knives that have to get done first, having a couple issues with the welder, and need to get the rest of the steel. But hopefully I can get through those things fairly soon.
Now back to the questions-
Fletch- sorry, you wrote your post plenty clear, I just misread it. As long as you get a good bite on the fixture with your vise, it won't go anywhere. The first version of this knife fixture I ever saw was one that knife maker Tiny Spencer (RIP) had in his shop in Astoria, OR. He used his with a cheapy 4" bench vise. But I'll be the first to admit that a rotating head vise is the easiest way to lock one of these down with absolute security.
As far as the bolt goes--- A piece of all-thread bent into an L, or a welded T-bolt will certainly work for tightening things down,
BUTI don't like it for this application...
The reason being: there are going to be times when you tighten it down, and it
IS going to be right in your way. That's why I just use a simple bolt in mine... it's never in my way. One of my older versions had a sliding handle in the bolt (just like a handle in a vise or C-clamp) but the handle was still
in my way half of the time.
Something I wanted to add to all of this since people have been talking about the base with all the interchangeable attachments--- I made that as a TIG welding project when I got sent back to school. I really didn't have any desire to have a vise like that, because I have always been so happy with the simple knife vise/fixture in combination with the rotating head vise. But it made for a good class project because there were quite a few weld requirements.
The biggest drawback to a knife vise with a base like that, is you can rotate things in the horizontal and vertical planes, but not anything in between. And it's the in-between where I do most of my hand work!
If a guy wants a complete knife vise with a base like that, then the one that Canadian knife maker/machinist Bob Patrick makes is as nice as they come. His vises are TIG welded and have pool balls for handles. Here's a video of Bob discussing his vise--- it is top of the line.
[video=youtube;q4bgDrB_1gQ]http://www.youtube.com/watch?v=q4bgDrB_1gQ[/video]