<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr"><span>Sorry Brian,</span></div><div dir="ltr"><span>no.</span></div><div dir="ltr"><span>Alan</span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1425777616136_15257"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1425777616136_15256"> <div dir="ltr" id="yui_3_16_0_1_1425777616136_15281"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Brian Cox 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> Sunday, March 8, 2015 10:10 AM<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_1425777616136_15255"><br><div id="yiv6836271057"><div id="yui_3_16_0_1_1425777616136_15254"><div style="font-family:Arial, sans-serif;font-size:10pt;" id="yui_3_16_0_1_1425777616136_15253"><div id="yui_3_16_0_1_1425777616136_15252">Hey Alan,</div><div id="yui_3_16_0_1_1425777616136_15282"> Do you know any Ham radio guys down there ?</div><div id="yui_3_16_0_1_1425777616136_15283"> </div><div> </div><div id="yui_3_16_0_1_1425777616136_15284">Brian,</div><div> </div><div id="yui_3_16_0_1_1425777616136_15285">KK6IRC</div><div id="yui_3_16_0_1_1425777616136_15286"> </div><div id="yui_3_16_0_1_1425777616136_15287">73<br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: Alan James via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none">Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br clear="none">Date: Sat, 7 Mar 2015 19:09:51 +0000 (UTC)<br clear="none"><br clear="none"></div><div class="qtdSeparateBR"><br><br></div><div class="yiv6836271057yqt9231368037" id="yiv6836271057yqt84243"><div style="color:rgb(0, 0, 0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;background-color:rgb(255, 255, 255);" id="yui_3_16_0_1_1425777616136_15289"><div dir="ltr" id="yui_3_16_0_1_1425777616136_15288"><span>Hank,</span></div><div dir="ltr"><span>had a quick search but couldn't find any suitable lapping</span></div><div dir="ltr"><span>solution for a home builder. There were referances to thick</span></div><div dir="ltr"><span>plate glass with a bonded diamond surface & marble as</span></div><div dir="ltr"><span>lapping plates.</span></div><div dir="ltr"><span>Alan</span></div><br clear="none"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Saturday, March 7, 2015 11:29 PM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Gamma ring machining<br clear="none"> </font> </div> <div><br clear="none"><br clear="none">Alan,<br clear="none">I have been told that it would work, but I am not convinced. I would think the machined disk needs to be harder so it does not wear down. Honestly I just don't know. <br clear="none">Hank--------------------------------------------<br clear="none">On Fri, 3/6/15, Alan James 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"><br clear="none"> Subject: Re: [PSUBS-MAILIST] Gamma ring machining<br clear="none"> To: "Personal Submersibles General Discussion" <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Received: Friday, March 6, 2015, 9:30 PM<br clear="none"> <br clear="none"> So<br clear="none"> do you think it would work with a flatsheet<br clear="none"> rotating on your reinforcing ring?I<br clear="none"> had thought of doing this with the hatch & landing,<br clear="none"> toget a<br clear="none"> perfect seal, not sure if I would need an orbital<br clear="none"> motionor<br clear="none"> not.Alan<br clear="none"> <br clear="none"> From: hank pronk via<br clear="none"> Personal_Submersibles<br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> To: Personal<br clear="none"> Submersibles General Discussion<br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> <br clear="none"> Sent:<br clear="none"> Saturday, March 7, 2015 12:52 PM<br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring machining<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Alan,<br clear="none"> Yes I<br clear="none"> have done lapping in the past. I mostly lap valves in<br clear="none"> engines. It works great on two tapered faces. <br clear="none"> Hank--------------------------------------------<br clear="none"> On Fri, 3/6/15, Alan James via<br clear="none"> 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>><br clear="none"> wrote:<br clear="none"> <br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring machining<br clear="none"> To:<br clear="none"> "Personal Submersibles General Discussion" <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Received: Friday, March 6, 2015, 6:39 PM<br clear="none"> <br clear="none"> Hank,are you<br clear="none"> familiar with lapping?Rubbing<br clear="none"> <br clear="none"> two surfaces together with abrasive paste in<br clear="none"> betweenhttp://en.wikipedia.org/wiki/Lapping<br clear="none"> Haven't<br clear="none"> done it but have<br clear="none"> seen it in operation; you can get a very<br clear="none"> <br clear="none"> smoothsurface<br clear="none"> with this technique. Not sure<br clear="none"> if you could adapt it to your<br clear="none"> newflange<br clear="none"> facing machine.The<br clear="none"> machine I<br clear="none"> saw in operation was slow but required very little<br clear="none"> attention.Alan<br clear="none"> <br clear="none"> <br clear="none"> From: hank pronk<br clear="none"> via<br clear="none"> Personal_Submersibles<br clear="none"> <br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> To: Personal<br clear="none"> Submersibles General Discussion<br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> <br clear="none"> Sent:<br clear="none"> <br clear="none"> Saturday, March 7, 2015 12:18 PM<br clear="none"> Subject:<br clear="none"> Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring machining<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Steve,<br clear="none"> I am half way done<br clear="none"> <br clear="none"> building my flange facing machine, I should be mostly<br clear="none"> done<br clear="none"> tomorrow. My rig already weighs<br clear="none"> about 700 lbs. I think<br clear="none"> it is important<br clear="none"> that it is heavy and mine is built heavier<br clear="none"> <br clear="none"> than the ones on YouTube. If it fails I can do as you<br clear="none"> mention. I actually did exactly what you say<br clear="none"> on<br clear="none"> Gamma's window frames. I used paint<br clear="none"> and glass with fine<br clear="none"> wet sand paper. I would<br clear="none"> guess the SS ring was much harder<br clear="none"> than the<br clear="none"> 516-70 I have.<br clear="none"> Hank<br clear="none"> <br clear="none"> --------------------------------------------<br clear="none"> On Fri, 3/6/15, Stephen Fordyce via<br clear="none"> 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>><br clear="none"> wrote:<br clear="none"> <br clear="none"> <br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring<br clear="none"> machining<br clear="none"> To:<br clear="none"> <br clear="none"> "Personal Submersibles General Discussion" <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" 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"> <br clear="none"> We used<br clear="none"> a flame facing machine recently at<br clear="none"> work to<br clear="none"> do a<br clear="none"> stainless steel flange on a<br clear="none"> pressure vessel about 800mm ID.<br clear="none"> We hired it<br clear="none"> to use<br clear="none"> ourselves at great expense, and the thing<br clear="none"> <br clear="none"> weighed a couple of hundred kilos, was very<br clear="none"> <br clear="none"> solid.<br clear="none"> The fitter who did the job was<br clear="none"> very<br clear="none"> experienced<br clear="none"> <br clear="none"> machinist (but hadn't used<br clear="none"> one before)<br clear="none"> but could not get<br clear="none"> the finish<br clear="none"> very smooth - I can't find photos sorry,<br clear="none"> but<br clear="none"> it was like regular machining grooves<br clear="none"> but much<br clear="none"> larger - and<br clear="none"> it<br clear="none"> looked pretty ordinary. He<br clear="none"> spent several<br clear="none"> hours with a<br clear="none"> grinder cleaning<br clear="none"> it up.<br clear="none"> On balance, it<br clear="none"> probably would have<br clear="none"> been easier<br clear="none"> to just flatten it manually<br clear="none"> <br clear="none"> with a grinder (but it was on a<br clear="none"> live<br clear="none"> liquefied natural gas plant and they don't<br clear="none"> like<br clear="none"> sparks:) ). Wasn't critical to<br clear="none"> get a flat<br clear="none"> face as we<br clear="none"> <br clear="none"> were just making room for a<br clear="none"> gasket in a<br clear="none"> slot to have more<br clear="none"> <br clear="none"> <br clear="none"> compression.<br clear="none"> After getting it pretty<br clear="none"> flat<br clear="none"> with a straight<br clear="none"> <br clear="none"> edge, the fine<br clear="none"> stuff/quality control could<br clear="none"> be done by a thin<br clear="none"> layer of paint on a<br clear="none"> known flat plate or<br clear="none"> machined flange<br clear="none"> which you put on the welded<br clear="none"> <br clear="none"> flange and then where there is<br clear="none"> no<br clear="none"> paint<br clear="none"> deposited, you know that area is too<br clear="none"> low. Obviously<br clear="none"> paint is no good, but<br clear="none"> colored oil or 2-layered<br clear="none"> carbon paper<br clear="none"> (nice because then you have a<br clear="none"> trace of it) would probably<br clear="none"> <br clear="none"> work, or<br clear="none"> charcoal.<br clear="none"> <br clear="none"> Cheers,<br clear="none"> <br clear="none"> Steve<br clear="none"> On 06/03/2015 11:40<br clear="none"> PM,<br clear="none"> "hank pronk via<br clear="none"> <br clear="none"> 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>><br clear="none"> wrote:<br clear="none"> Brian,<br clear="none"> <br clear="none"> No, the machine is<br clear="none"> connected<br clear="none"> to the inside lip of the<br clear="none"> ring. The<br clear="none"> machine rotates<br clear="none"> on a center pivot. The cutter<br clear="none"> rotates<br clear="none"> instead of the part.<br clear="none"> <br clear="none"> <br clear="none"> Hank<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> --------------------------------------------<br clear="none"> <br clear="none"> On Thu, 3/5/15, Brian<br clear="none"> Cox<br clear="none"> 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>><br clear="none"> wrote:<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Subject: Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring<br clear="none"> machining<br clear="none"> <br clear="none"> To:<br clear="none"> "Personal Submersibles General<br clear="none"> <br clear="none"> Discussion"<br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> Received: Thursday,<br clear="none"> March<br clear="none"> 5, 2015, 9:15 PM<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Hank, are you going to<br clear="none"> be<br clear="none"> <br clear="none"> turning the whole<br clear="none"> fricking sub ?<br clear="none"> <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 rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" 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"> <br clear="none"> <br clear="none"> From:<br clear="none"> 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>><br clear="none"> <br clear="none"> To: <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br clear="none"> <br clear="none"> Subject:<br clear="none"> [PSUBS-MAILIST]<br clear="none"> Gamma ring machining<br clear="none"> <br clear="none"> <br clear="none"> Date:<br clear="none"> Thu, 5 Mar 2015 18:00:24 -0800<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Today my<br clear="none"> welder came to my shop and<br clear="none"> welded the<br clear="none"> <br clear="none"> reinforcing<br clear="none"> <br clear="none"> ring into<br clear="none"> Gamma, 10 passes, looks perfect!<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> Next<br clear="none"> step, machine the<br clear="none"> ring. I am going to make a<br clear="none"> <br clear="none"> flange facing machine from<br clear="none"> a one ton truck full<br clear="none"> <br clear="none"> <br clear="none"> floater differential hub<br clear="none"> and a part or two borrowed<br clear="none"> from<br clear="none"> my<br clear="none"> <br clear="none"> <br clear="none"> spare lathe. The rig will be hydraulic<br clear="none"> drive. <br clear="none"> <br clear="none"> This may<br clear="none"> or may not<br clear="none"> work. :-) If it works and<br clear="none"> I<br clear="none"> <br clear="none"> am confident it<br clear="none"> will, I can also face CT<br clear="none"> lands, with the<br clear="none"> CT<br clear="none"> <br clear="none"> <br clear="none"> welded in place.<br clear="none"> <br clear="none"> <br clear="none"> Hank<br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> _______________________________________________<br clear="none"> <br clear="none"> <br clear="none"> Personal_Submersibles<br clear="none"> mailing list<br clear="none"> <br clear="none"> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <br clear="none"> <a rel="nofollow" shape="rect" target="_blank" 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