<div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_1_1425753720176_4393"><span>Hank,</span></div><div dir="ltr" id="yui_3_16_0_1_1425753720176_4395"><span id="yui_3_16_0_1_1425753720176_4394">had a quick search but couldn't find any suitable lapping</span></div><div dir="ltr" id="yui_3_16_0_1_1425753720176_4395"><span id="yui_3_16_0_1_1425753720176_7406">solution for a home builder. There were referances to thick</span></div><div dir="ltr" id="yui_3_16_0_1_1425753720176_4395"><span>plate glass with a bonded diamond surface & marble as</span></div><div dir="ltr" id="yui_3_16_0_1_1425753720176_4395"><span>lapping plates.</span></div><div dir="ltr" id="yui_3_16_0_1_1425753720176_4395"><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_1425753720176_4400"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1425753720176_4399"> <div dir="ltr" id="yui_3_16_0_1_1425753720176_4398"> <hr size="1">  <font size="2" face="Arial" id="yui_3_16_0_1_1425753720176_4401"> <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 11:29 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_1425753720176_7860"><br><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 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, 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 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: Personal<br clear="none"> 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"> 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 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">  Subject: Re:<br clear="none"> [PSUBS-MAILIST] Gamma ring machining<br clear="none">  To:<br clear="none"> "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, 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 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: Personal<br clear="none">  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">  <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 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"> 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 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">  <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 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<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 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">  <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 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,<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 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">   <br clear="none">  <br clear="none">   From:<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">   <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:<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 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">  _______________________________________________<br clear="none">   <br clear="none">  <br clear="none">  Personal_Submersibles<br clear="none">  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"> _______________________________________________<br clear="none">   <br clear="none">   Personal_Submersibles<br clear="none">  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">  -----Inline Attachment Follows-----<div class="qtdSeparateBR"><br><br></div><div class="yqt9859451357" id="yqtfd52861"><br clear="none"> <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">   <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"> _______________________________________________<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">  -----Inline Attachment Follows-----<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><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><br clear="none"> <br clear="none">    <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<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>