<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr"><span>Hank,</span></div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr"><span id="yui_3_16_0_1_1425684742520_3017">are you familiar with lapping?</span></div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr"><span id="yui_3_16_0_1_1425684742520_3602">Rubbing two surfaces together with abrasive paste in between</span></div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr"><span id="yui_3_16_0_1_1425684742520_3023"><a href="http://en.wikipedia.org/wiki/Lapping" id="yui_3_16_0_1_1425684742520_3022">http://en.wikipedia.org/wiki/Lapping</a><br></span></div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr">Haven't done it but have seen it in operation; you can get a very smooth</div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr">surface with this technique. Not sure if you could adapt it to your new</div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr">flange facing machine.</div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr">The machine I saw in operation was slow but required very little attention.</div><div id="yui_3_16_0_1_1425684742520_2615" dir="ltr">Alan</div><div id="yui_3_16_0_1_1425684742520_2615"> </div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1425684742520_2611"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1425684742520_2610"> <div dir="ltr" id="yui_3_16_0_1_1425684742520_2609"> <hr size="1" id="yui_3_16_0_1_1425684742520_3604"> <font size="2" face="Arial" id="yui_3_16_0_1_1425684742520_2612"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, March 7, 2015 12:18 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Gamma ring machining<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1425684742520_2999"><br>Steve,<br clear="none">I am half way done building my flange facing machine, I should be mostly done tomorrow. My rig already weighs about 700 lbs. I think it is important that it is heavy and mine is built heavier than the ones on YouTube. If it fails I can do as you mention. I actually did exactly what you say on Gamma's window frames. I used paint and glass with fine wet sand paper. I would guess the SS ring was much harder than the 516-70 I have.<br clear="none">Hank<br clear="none">--------------------------------------------<br clear="none">On Fri, 3/6/15, Stephen Fordyce via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"> Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br clear="none"> To: "Personal Submersibles General Discussion" <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Received: Friday, March 6, 2015, 4:06 PM<br clear="none"> <br clear="none"> Hi Hank,<br clear="none"> <br clear="none"> We used a flame facing machine recently at work to do a<br clear="none"> stainless steel flange on a pressure vessel about 800mm ID.<br clear="none"> We hired it to use ourselves at great expense, and the thing<br clear="none"> weighed a couple of hundred kilos, was very solid.<br clear="none"> The fitter who did the job was very experienced<br clear="none"> machinist (but hadn't used one before) but could not get<br clear="none"> the finish very smooth - I can't find photos sorry, but<br clear="none"> it was like regular machining grooves but much larger - and<br clear="none"> it looked pretty ordinary. He spent several hours with a<br clear="none"> grinder cleaning it up.<br clear="none"> On balance, it probably would have been easier<br clear="none"> to just flatten it manually with a grinder (but it was on a<br clear="none"> live liquefied natural gas plant and they don't like<br clear="none"> sparks:) ). Wasn't critical to get a flat face as we<br clear="none"> were just making room for a gasket in a slot to have more<br clear="none"> compression.<br clear="none"> After getting it pretty flat with a straight<br clear="none"> edge, the fine stuff/quality control could be done by a thin<br clear="none"> layer of paint on a known flat plate or machined flange<br clear="none"> which you put on the welded flange and then where there is<br clear="none"> no paint deposited, you know that area is too low. Obviously<br clear="none"> paint is no good, but colored oil or 2-layered carbon paper<br clear="none"> (nice because then you have a trace of it) would probably<br clear="none"> work, or charcoal.<br clear="none"> Cheers,<br clear="none"> <br clear="none"> Steve<br clear="none"> On 06/03/2015 11:40 PM,<br clear="none"> "hank pronk via Personal_Submersibles" <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> wrote:<br clear="none"> Brian,<br clear="none"> <br clear="none"> No, the machine is connected to the inside lip of the<br clear="none"> ring. The machine rotates on a center pivot. The cutter<br clear="none"> rotates instead of the part.<br clear="none"> <br clear="none"> Hank<br clear="none"> <br clear="none"> --------------------------------------------<br clear="none"> <br clear="none"> On Thu, 3/5/15, Brian Cox via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> wrote:<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br clear="none"> <br clear="none"> To: "Personal Submersibles General Discussion"<br clear="none"> <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> Received: Thursday, March 5, 2015, 9:15 PM<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Hank, are you going to be<br clear="none"> <br clear="none"> turning the whole fricking sub ?<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Brian<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> --- <a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br clear="none"> <br clear="none"> wrote:<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> From: hank pronk via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> To: <a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br clear="none"> <br clear="none"> Subject: [PSUBS-MAILIST] Gamma ring machining<br clear="none"> <br clear="none"> Date: Thu, 5 Mar 2015 18:00:24 -0800<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Today my welder came to my shop and welded the<br clear="none"> reinforcing<br clear="none"> <br clear="none"> ring into Gamma, 10 passes, looks perfect!<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Next step, machine the ring. I am going to make a<br clear="none"> <br clear="none"> flange facing machine from a one ton truck full<br clear="none"> <br clear="none"> floater differential hub and a part or two borrowed from<br clear="none"> my<br clear="none"> <br clear="none"> spare lathe. The rig will be hydraulic drive. <br clear="none"> <br clear="none"> This may or may not work. :-) If it works and I<br clear="none"> <br clear="none"> am confident it will, I can also face CT lands, with the<br clear="none"> CT<br clear="none"> <br clear="none"> welded in place.<br clear="none"> <br clear="none"> Hank<br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> <br clear="none"> Personal_Submersibles mailing list<br clear="none"> <br clear="none"> <a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <br clear="none"> <a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> <br clear="none"> Personal_Submersibles mailing list<br clear="none"> <br clear="none"> <a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <br clear="none"> <a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> <br clear="none"> Personal_Submersibles mailing list<br clear="none"> <br clear="none"> <a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <br clear="none"> <a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<div class="qtdSeparateBR"><br><br></div><div class="yqt1108895444" id="yqtfd39504"><br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></div><br><br></div> </div> </div> </div></body></html>