I just wanted to post on something I now know is very important. I know as I'm sure all of us do wearing saftey glasses is a must when things could fall on you. But make sure they are tight to your face please and they are the big dorky kind. I made the mistake of leaving my normal glasses in the tool chest where they got scratched badly. SO when I was grinding out my piolot bearing I wore my oakleys (eye jakets they are huge) but with my head tilted bake and the glasses not so tight I manged to get some metal in my eye. I spent the next evening at the eye doctors where they picked it out of my eye followed by a nice scraping of rust.
So I ask you to make sure your glasses or googles are nice and tight