<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_ym19_1_1480626748296_3217"><span>Hi Sean,</span></div><div id="yui_3_16_0_ym19_1_1480626748296_3217"><span id="yui_3_16_0_ym19_1_1480626748296_3403">No the seal comes from the o-ring, the metal to metal is to carry the hull stress. It is my feeling it will be okay because I have a significant reinforcement with the land ring. Just a gut feeling lol. I am not sure what you mean by compressing thee o-ring to zero. The hatch will close to within .02 in with vacuum from the compressor, the o-ring is completely encapsulated at that point. </span></div><div id="yui_3_16_0_ym19_1_1480626748296_3217"><span>Hank</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, December 1, 2016 12:53 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv0287250816"><div><div dir="ltr">Hank - are you expecting the conical interface to perform as a metal to metal seal at depth? Or merely to carry the hull shell stresses? Do you know how much pressure is required to compress your o-ring sufficiently to reduce the extrusion gap to zero? Is this even possible? Or does the cone engage and prevent it?</div>
<div dir="ltr">Sean<br>
</div>
<br><br><div class="yiv0287250816gmail_quote">On December 1, 2016 10:38:23 AM MST, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="yiv0287250816gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex;">
<div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"><div><span>Brian,</span></div><div id="yiv0287250816yui_3_16_0_ym19_1_1480613639651_3333" dir="ltr"><span id="yiv0287250816yui_3_16_0_ym19_1_1480613639651_3334">I test for fit with the o-ring out. Don't worry about yours, flat hatches will bend like butter. My K350 hatch had a .04 in dip in it and it flattened out right away. You just need a bit more weight pulling on your hatch. Gamma used to drip on every dive from the hatch seal. I made an adjustment to tighten the one dog and that cured it. How hard is your o-ring?</span></div><div id="yiv0287250816yui_3_16_0_ym19_1_1480613639651_3333" dir="ltr"><span>Hank</span></div> <div class="yiv0287250816qtdSeparateBR"><br><br></div><div class="yiv0287250816yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;">
<div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font size="2" face="Arial"> On Thursday, December 1, 2016 9:38 AM, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="yiv0287250816y_msg_container"><div id="yiv0287250816"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><div>Hank, Is that with out the o ring installed? Now you've got me worried, I had to give my hatch a little help by sitting on it when I pulled a vacuum on it. I'm not sure why exactly I'll have to check again.</div><div> </div><div>Brian<br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">To: Personal Submersibles General Discussi!
on
<personal_submersibles@psubs.org><br clear="none">Subject: Re: [PSUBS-MAILIST] conical hatch seat troubles<br clear="none">Date: Thu, 1 Dec 2016 15:22:15 +0000 (UTC)<br clear="none"><br clear="none"></div><div class="yiv0287250816yqt1766788200" id="yiv0287250816yqt11291"><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255, 255, 255);"><div><span>Carsten,</span></div><div dir="ltr"><span>I can turn it but it is very heavy and wants to wobble in the seat or climb out because it is conical. It is a solution though! Is it </span>necessary though?</div><div dir="ltr">Hank</div> <div><br clear="none"><br clear="none"></div><div style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, ida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font face="Arial" size="2"> On Thursday, December 1, 2016 4:56 AM, "MerlinSub@t-online.de via Personal_Submersibles" <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div><div><div><div style="margin:0px;"> </div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">Hank can you turn the hatch in the seat ? <br clear="none"></span></div>
<div style="margin:0px;"> </div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">3 Peace of sandpater all 120 degree and turning and water dripping from a hose </span></div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">or later Piston Paste between hatch and seat ? </span></div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">Making a leaver on the hatch and running the hole day around the submarine?</span></div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">30 Turns clockwise and 30 turns anticclock. Than again. </span></div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">Do you have friends liking hard walking? Its a good evening with two friends and some sixpacks of beer</span></div>
<div style="margin:0px;"> </div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">It was exact that way Emile and I making the final seat of a dome seat. </span></div>
<div style="margin:0px;"> </div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;">vbr Carsten </span></div>
<div style="margin:0px;"><span style="color:rgb(0, 0, 0);font-family:arial, helvetica, sans-serif;font-size:10pt;text-decoration:none;"></span> </div>
<div style="margin:0px;"> </div>
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<div style="margin:0px;"> </div>
<div style="margin:0px;">-----Original-Nachricht-----</div>
<div style="margin:0px;">Betreff: [PSUBS-MAILIST] conical hatch seat troubles</div>
<div style="margin:0px;">Datum: 2016-12-01T12:00:56+0100</div>
<div><div style="margin:0px;">Von: "hank pronk via Personal_Submersibles" <personal_submersibles@psubs.org></div>
<div style="margin:0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></div>
<div style="margin:0px;"> </div>
<div style="margin:0px;"> </div>
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<div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255, 255, 255);">
<div>Hi All,</div>
<div dir="ltr">I have a problem with my conical hatch seat. I have discovered that I have a .005 in gap between the hatch and seat in two spots. It seems the seat is oval with a gap at each end. I have no way of measuring this other than placing video cassette tape ribbon strips between the hatch and seat. What I do is, I cut the ribbon into 3 inch strips, then tape them in place so they are hanging over the seat. I put one every two inches, then close the hatch. The ribbons are then trapped tight in the gap. if the ribbons can pull out then there is a gap. Sure enough, I can remove one at the front, so I put two ribbons on top of each other in that spot and it still pulls out. I add another making 3 ribbons thick and it is tight. Then I tried doubling one ribbon in the front and one opposite in the back and they were tight. The conclusion is that the seat is oval by .005 in at each end. I put the !
hatch
back in the lathe and re-faced it, to be sure it is not the hatch. It is the seat, it seems my flange facing machine is not perfect-not a big surprise. This is still very good for a portable home made tool.</div>
<div dir="ltr">I don't know if this a problem or not, how accurate does this have to be? Will the assembly simply bend? My feeling is the hatch and seat will deform to match under pressure. To put it into perspective, I just measured a hair and that is .01 in. the same as the total gap combined.</div>
<div dir="ltr">Hank</div>
</div>
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