[PSUBS-MAILIST] hole saw

[hank pronk via Personal_Submersibles]

Hi All,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.Hank
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