How to hold a replacement vise jaw.

[earlgo]

The angle plate is a commercial section that is ground flat on the dumb side. If the angle plate is turned around with the vise on the back, there is very little in-and-out travel. The swivel base was expedient to get the jaws in the right orientation.
There is quite a bit of up-and-down travel so I really like your idea of a base plate full of threaded holes clamped/bolted to the single slot. Wish that I had thought of that.
This is why I asked for suggestions because of the flimsy setup.
Thanks again.
--earlgo

[earlgo]

Follow up:
Here are the vise jaws being notched for the special fixture.

And here is the grinding fixture holding a special firing pin that has 3 flats in the same orientation. They could have been cut by hand, but what is the fun in that.

Now I can hold small round things parallel to the jaws and close to the top without their shooting off into the corner under the bench. BONUS.

--earlgo

[Mr Ron]

One of my thoughts was to clamp the part face to the face of a 4" angle, clamped crotch down on the table, but I didn't take the time to do that. It would have allowed the use of the arbor and a wheel cutter.

ANGLE_JAW.jpg

Oh well, next time.
--earlgo

Structural steel angles don't have precise 90° angles.

[earlgo]

You are correct. They just need to be tweaked a bit. This is the big structural angle I use to mount the vise when it was in process.

The smaller angle I had in mind had already been 'adjusted'. A flat surface and a few shims and one can get to 45° with a little care.
--earlgo