There is a free to use design in the Susan Kingsley book.
And, it doesn’t require any welding.
Plus, that design had the needed engineering work done, so it’s
properly designed for safe use, though without some of the
refinements for safety that the Bonny Doon Design later added.
That issue of safety, though it’s been mentioned before, cannot be
overstated. Designing your own press or other high pressure
equipment, if you don’t have the engineering skills needed to do it
right, is not a good idea. Just because an “A” frame your welder puts
together may look good, doesn’t mean it’s safe.
Putting pieces of metal, dies, and whatever, into a press and
putting 20 tons of pressure on it, is a very different animal than
hitting a manual punch with a hammer. If something breaks, or just
slips out of alignment, at those pressures, the resulting accident
can easily be lethal. People can be, and have been, killed when even
properly designed presses have accidents. Our jewelry presses are
smaller than most of those offending industrial presses, but the
potential remains, especially when innovative but untrained (in press
safety and engineering) artists come up with new tooling they feel
will work. When such tooling unexpectedly fails, and something snaps
and flies across the room with enough force to seriously injure or
kill someone, is the wrong time to come to the conclusion that
perhaps it wasn’t a good idea after all.
That doesn’t mean presses cannot be used safely by artists. They can
be. It just means don’t be cavalier about the design and tooling, and
the risks involved of getting it wrong.