<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Hank, Are you thinking about using O ring seals on the outside and in the opening? They have big machines that could literally punch a hole like that . Why don't you want to weld it in?</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Stephen Fordyce via Personal_Submersibles <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] boring tool<BR>Date: Mon, 27 Nov 2017 12:56:47 +0000 (UTC)<BR><BR></DIV><DIV style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><DIV></DIV>
<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><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></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><BR><DIV><DIV>On Mon, Nov 27, 2017 at 4:17 PM, Rick Patton via Personal_Submersibles <SPAN dir="ltr"><<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>></SPAN> wrote:<BR><BLOCKQUOTE 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>Hank, </DIV><DIV>Have you checked into a mag drill yet?</DIV><DIV>Rick </DIV><DIV><BR><DIV><DIV><DIV><DIV>On Sun, Nov 26, 2017 at 1:49 PM hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</A>> wrote:<BR></DIV></DIV></DIV><BLOCKQUOTE 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><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>
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