Making Threads, was RE: [TheForge] Re: Vice repair

[Jeffrey Polaski]

> Barking Crow:
> you said,      .) Weld the "threads" onto a piece of the same size
pipe.
> Which I understand to make the male threads.  Did you then fasten the
other
> piece of square to the inside of a slightly larger pipe to make the
female
> threads?  How?  

I'm going to use the threads to anchor a pipe to a ceramic nozzle for a
burner. I figured I'd make the nozzle out of ramable refractory, punch a
hole in it with another length of pipe, and then just *twist* the
threaded pipe into it to make the female threads. 

I hadn't really thought about making female threads to fit in a piece of
pipe. If you have a pipe with the right inside diameter I think you
could braze the threads in, or just weld the outside edges. Or you could
drill some holes through the pipe and plug weld the threads to the pipe.

The 1/4" square stock is pretty rigid when it's coiled up. If you're
making female dies for cutting wood I don't think you'll need to weld
it. You could just use the coil all alone - but I'd probably just drill
a large enough hole in a piece of wood, attach a handle, and epoxy the
threads in. You just need to make sure to cut and grind the threads so
it works like a proper die. 

Remember, these are pretty "rude & rough" threads, if you want to make
something nice you'll need a lathe.

> Could you also put a picture of the nozzle threads you made on your
website?

I'll post some pictures and a description of the process, but I can't
find the charger for my camera right now, so it might be a little while.
(This could be a good excuse to buy the digital SLR I've been wanting...
I just wish I could actually afford it!) Any way, if I can't get the
camera working soon, I'll draw some pictures, scan them in, and post
those.