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<div>Rick, I thought about a Mag drill, but I was thinking about taking my small milling machine apart and making a mount on the sphere. A mag drill could be adapted easier because I could just tack weld a flat plate to the hull for it to sit on. I have never used a mag drill and don't know how slow they can turn? I figure I will have to turn something pretty slow. </div><div>Steve, I don't know if I can cut it out with a milling bit, I have very little experience with this idea. I could cut it out small with a torch using a circle guide also. I hate machining torch cut pieces because they tent to surface harden. I suppose I could grind the hard surface off first. I am looking for a easy clean way to do this, before I jump in and do it the hard way. </div><div>My goal in to put two small ports in Elementary 3000 without welding them in. I will machine two holes in the hull and then machine two conical port frames to fit the hull perfectly and will be retained from the inside of the hull. </div><div>Any clever ideas to achieve this would be appreciated.</div><div>Hank</div><div><br></div><div><br></div>
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On Sunday, November 26, 2017, 11:16:30 PM MST, Stephen Fordyce via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="yiv6911819024"><div><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 clear="none"></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 clear="none"></div><div>Cheers,</div><div>Steve</div></div><div class="yiv6911819024gmail_extra"><br clear="none"><div class="yiv6911819024yqt4147063519" id="yiv6911819024yqtfd37438"><div class="yiv6911819024gmail_quote">On Mon, Nov 27, 2017 at 4:17 PM, Rick Patton via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv6911819024gmail_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 clear="none"><div class="yiv6911819024gmail_quote"><div><div class="yiv6911819024h5"><div>On Sun, Nov 26, 2017 at 1:49 PM hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></div></div></div><blockquote class="yiv6911819024gmail_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="yiv6911819024h5"><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>______________________________ _________________<br clear="none">
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