Once upon a time, when I was in college, one summer I worked in a foundry as a grinder. The machines we used were huge. I'm trying to remember the dimensions, I remember it was a two wheel model, the wheel we worked on must have had a 18-24" diameter and the belts I think where 3" X at least 80". The only safety gear we got were welders gloves when we were grinding molding gates from bronze bearings. I wore glasses in those days and as I was music major in college I wore ear plugs on my own. No apron, no face shields, no steel tipped boots, (some of the flanges we ground weight 110 lbs.) I have scares on my right forearm where a broken belt swiped me as I reached to shut off the machine to change a nicked belt. It was a sand molding foundry for aluminum, brass and bronze. We did not use respirators. It seems like I made it that summer with just the arm swipe. Now, tell me there is no God.