What would be the best way to to drill/press/punch a perfect 3/4" inch hole into a big bottle cap? Answered
I would like to put a 3/4" inch hole into a big bottle cap so I can connect a water valve through the cap. What makes this interesting is that the Cap is very thin metal, and because a valve with a rubber washer is attaching to the cap it needs to be a perfect circle so water wont leak out. Plus, I would like to be able to mass produce this item (100 an hr), so the method needs to be quick, clean and reliable.