Over at YouTube, arduinoversusevil put together a detailed video showing how he built a compact mechanical press using steel plates and heavy duty threaded screws.
The project requires a mill, annular cutters, welding equipment, and a heavy-duty metal-cutting saw, but there might be ways to get things done with fewer tools.
The press could be used for pressing, broaching, and machining tasks, and as demonstrated at the end, it is powerful enough to punch a 17mm hex key through an 8mm steel plate.
While I don’t have the equipment to tackle this project, I found the video to be informative and entertaining. It’s also chock-full of wisdom as well, with my favorite being don’t shoot sparks at your dingus.