<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div>Hi All,</div><div>I need to cut a 8 inch hole through 1\4 inch of 516-70 I am tempted to just try a bi-metal hole saw. I can't use heat at all so it has to be machined or something like it. Has anyone tried this? I can buy the 8 inch hole saw for around 100 dollars.</div><div>Hank</div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"></div></div></body></html>