Pictures Of the Factories

[SIGP2101]

Originally Posted by Puretexan

I wonder what kind of machine they used to cut the rectangular hole for the safety bar.
Its already thin and they cut a perfect hole for it to ride in. I can't imagine how they did it. I have a mill and doubt that I could do it.

By broaching on vertical press after drilling initial hole. Custom made broach would be used for this. That is one possibility, another way would be shaper tool.