Don't know the particulars of old-fashioned metal work, but maybe steam-powered machines. Most of what we consider to be the Industrial Revolution took place well before the factories relied on electricity. Even before that, there were water-powered machines that could do all kinds of things.
Don't quote me on this, but it also seems like someone, somewhere once posted a picture having to do with razor manufacture, and it was a room full of women who were using machines that ran on some kind of manual power, like foot pumps or something. As you can tell, I'm a bit hazy on the particulars. :D