<div dir="ltr"><div>Hi Hank,</div><div>You could probably get away with using a holesaw - a one-piece one design for cutting metal, not the adjustable ones for cutting wood. It would take a while and need lots of coolant and force, but I think it would be quite doable (I've seen big ones used on thick steel before). The big ones aren't cheap though.</div><div><br></div><div>Or couldn't you just mill out the circle with a smaller milling bit, so that you end up with a disc that drops out when you finish the cut?</div><div><br></div><div>Cheers,</div><div>Steve</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 27, 2017 at 4:17 PM, Rick Patton via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Hank, </div><div>Have you checked into a mag drill yet?</div><div>Rick </div><div><br><div class="gmail_quote"><div><div class="h5"><div>On Sun, Nov 26, 2017 at 1:49 PM hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<br></div></div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div><div class="h5"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div>Hi All,</div><div>Is there such a tool that can bore a 6 inch dia hole in 1 inch thick plate. Some sort of milling machine tool, it needs to machine a precision hole.</div><div>Hank</div></div></div></div></div>______________________________<wbr>_________________<br>
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