I spent some more time working tonight/this morning. I think the black and decker electric drill gods are angry. I've flexed the housing on the thing a few times these last few days and last night I was worried it might catch fire... it was that hot... it's also gotten pretty noisy/wobbly.
Let me start off by saying that I did eventually get most of the last screw out. I ended up using the dremel and a small grinding stone to work away at the remaining metal of the screw. After I started seeing the "swirl" of the threads that were left in the iron I started the tap.
I kinda buggered it up a bit because I used a drill bit slightly too large at the top of the hole to take threads from the proper size tap, the first 1/8-1/4 inch has no threads . I then got into the area I used the dremel in and it seemed to run the tap down alright.
After an inch or so I hit a part of the bolt that I couldn't turn the tap into anymore(the hole narrowed), it was towards the bottom and I just stopped. I figured since I had a good half dozen threads engaged it wasn't worth it to keep pushing my luck... plus I had totally ate up my grinding bit on the dremel. I may get a hair up my *** and push more with a new grinding stone to get more threads engaged. I really don't believe it's necessary from a functional perspective as the screw really just holds the jaw in place. I don't imagine they take much of any loading from clamping an object.
Also of note is that the 5/8" carriage bolts fit rather sloppily in the hole for the swivel hold downs. They really look like they would be ideally 11/16" or a bit bigger. Obviously I can't find anything like this and I'm sure the holes are probably bigger because of rust eating away the metal.
Of further interest, several of the punch pins seem to be splined on one end and not the other and I really buggered up one. It also appears that the splines are on the outside of the hole they are driven into. So you can't just drive in the pins from the outside.
How are these splined shafts driven in? I can't drive them in from inside the vise.
can you get replacements anywhere?
should I just say to hell with the splines and drive some appropriately sized pins in?
I picked up a knotted wire wheel for my 4.5" grinder and I plan on beating the rust and remaining paint down with that. then I'll start dunking the parts back in the washing soda bath. After a lot more thought, I figure I'll just prime and paint with some rattle can or maybe some appliance paint.
I could use some epoxy or I could get everything powder coated. But in the end the vise is going to see heat and hammers and something that is easily repaired is more appealing from a practical standpoint.
Ideally I'd like to leave it bare and just use some grease, but when heating metal it would make an awful smoky mess in the garage.
I'll post up drill/thread/tap/bolt sizes in the next couple replies to hopefully set others on the right path if "god forbid" they ever run across a similar situation.
here's some pics from everything I've mentioned in this thread... hopefully they clarify what I couldn't describe well. I apologize for not breaking it down per paragraph but I'm pretty worn out.