<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Thanks Steve.</div><div id="AppleMailSignature">Enjoyed my time in Melbourne. </div><div id="AppleMailSignature">Too many good restaurants, coffee bars & wineries!</div><div id="AppleMailSignature">Alan</div><div id="AppleMailSignature"><br>Sent from my iPad</div><div><br>On 11/09/2017, at 1:52 PM, Stephen Fordyce via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>Hi Alan,</div><div>Yes I believe the screws can come out afterwards (I haven't actually tried it - but that's what my anodiser suggested last time after I pointed out the marks).e</div><div><br></div><div>I reckon the SS washers would be ok against the anodised ally but you may as well use some fibre washers if easily available.</div><div><br></div><div>I think the hard anodising is just a thicker layer of oxide - ie. it's not much more expensive, just takes a little longer and is just a bit harder to scratch/ding.</div><div><br></div><div>Cheers,</div><div>Steve</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 11, 2017 at 11:43 AM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Thanks Steve,</div><div>that's good information & advice.</div><div>Can you get the aluminium screws out after the anodising</div><div>or do they become one with the surrounding anodising?</div><div>I have long bolts running through the 3 sections pulling</div><div>them all together & compressing O-rings. The bolts extend out</div><div>the back to mount an attachment bracket if needed. ( as in attached photo)</div><div>Do you think a stainless washer under the nuts that tighten this together </div><div>would do the anodising any harm? I could look at using a thin fibre washer </div><div>under the stainless washer.</div><div>Other than that I could get a quote on hard anodising.</div><div>Cheers Alan</div><div><image1.JPG><br></div><div><br><div>Sent from my iPad</div></div><div><div class="h5"><div><br>On 11/09/2017, at 1:09 PM, Stephen Fordyce via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>Hi Alan,</div><div>In reference to your anodising - I use Collins Anodic in Melbourne, and I'd estimate about AU$150 for your 15 pieces. I reckon the places in Auckland would be pretty similar.</div><div><br></div><div>I haven't bothered with hard anodising my caving lights and they get knocked around (and salt water immersed) and are ok. Just be careful where you are screwing other metals in (ie. cable glands) because if they scrape off the anodising, corrosion will happen.</div><div><br></div><div>If you can be flexible on colour (black, blue, clear and gold are common) that will likely help keep the cost down.</div><div><br></div><div>They need to put a piece of wire on each piece to hang it in the anodising bath - which leaves a mark. If you have tapped holes in your part and you can find some aluminium screws for them, the wire can go on that. The screw hole isn't then very well anodised, so ideally it's on the inside.</div><div><br></div><div>Cheers,</div><div>Steve</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Sep 9, 2017 at 11:16 AM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>></span> wrote:<br><blockquote class="gmail_quote" 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 dir="auto"><div>Thanks Hugh, it's ID groove.</div><div>I have been cleaning up my OD grooves with sand paper, taking the</div><div>sharp edge off the groove then finishing with 1200 grit to get a polished </div><div>surface. Not sure if this is the done thing! The OD grooves had less chatter.</div><div>I have been setting the tool height to my dead centre in the tail stock; but</div><div>might put a centre in the chuck to double check. Will have a look at moving</div><div>the tool back as far as I can in the tool holder. </div><div>Any recommendations on a good anodiser? I did talk briefly to one who said</div><div>I didn't necessarily need to have a hard anodising finish for a marine </div><div>application. Only if it might be knocked around! I have 5 lights each in 3 </div><div>sections, any idea of a ball park figure for what 15 pieces should cost me?</div><div>Cheers Alan</div><div><br></div><div><br><div>Sent from my iPad</div></div><div><div class="m_5421660515006849344h5"><div><br>On 9/09/2017, at 12:16 PM, Hugh Fulton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote:<br><br></div><blockquote type="cite"><div><div class="m_5421660515006849344m_-7246502037469711931WordSection1"><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Alan,<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Post a picture/photo of how you are machining and your setup and then we can solve it. Tool height is critical as is tool and work rigidity.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">You should not have chatter if you are machining correctly. Is it an ID groove or an OD groove? Hugh<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p><div><div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(181,196,223) currentColor currentColor;padding:3pt 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-US" style="font-family:"Tahoma","sans-serif";font-size:10pt">From:</span></b><span lang="EN-US" style="font-family:"Tahoma","sans-serif";font-size:10pt"> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">mailto:personal_submersibles-<wbr>bounces@psubs.org</a>] <b>On Behalf Of </b>Alan via Personal_Submersibles<br><b>Sent:</b> Saturday, 9 September 2017 9:58 AM<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] Finishing O-ring groove<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Thanks Hank.<u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">I couldn't get a file in to this internal groove & it may jam. <u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">About 2 & 1/2" diameter.<u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">Will try my wire idea. I get there eventually doing it by hand<u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">& folded sandpaper, but I'm considering doing another bunch<u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">after this 4 & trying to find a better way.<u></u><u></u></p></div><div id="m_5421660515006849344m_-7246502037469711931AppleMailSignature"><p class="MsoNormal">Alan<br><br>Sent from my iPad<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12pt"><br>On 9/09/2017, at 9:43 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote:<u></u><u></u></p></div><blockquote style="margin-top:5pt;margin-bottom:5pt"><div><div><div><p class="MsoNormal"><span style="font-family:"Helvetica Neue";font-size:10pt">Alan,<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Helvetica Neue";font-size:10pt">I use a flat file <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Helvetica Neue";font-size:10pt">Hank<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-family:"Helvetica Neue";font-size:10pt"><u></u> <u></u></span></p></div><div id="m_5421660515006849344m_-7246502037469711931yahoo_quoted_5148835985"><div><div><p class="MsoNormal"><span style="color:rgb(38,40,42);font-family:"Helvetica Neue";font-size:10pt">On Friday, September 8, 2017, 3:21:54 PM MDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote: <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:rgb(38,40,42);font-family:"Helvetica Neue";font-size:10pt"><u></u> <u></u></span></p></div><div><p class="MsoNormal"><span style="color:rgb(38,40,42);font-family:"Helvetica Neue";font-size:10pt"><u></u> <u></u></span></p></div><div><div><p class="MsoNormal"><span style="color:rgb(38,40,42);font-family:"Helvetica Neue";font-size:10pt">Thanks, Brian & James.<br>Unfortunately Brian I'm getting that little bit of chatter & I am<br>needing to sand them down. Am also sanding the mating<br>surfaces; finishing with 1200 grit & oil.<br>I had thought of the dremel James. Trouble is that for these<br>small grooves I would need the grinder on the dremel at the<br>same profile as the O-ring groove. <br>I might try bending up a peice of wire & hot glueing on <br>sand paper. <br>Not a lot I've found about this while Googling!<br>Alan<br><br>Sent from my iPad<br><br>> On 9/09/2017, at 6:59 AM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>> wrote:<br>> <br>> Alan, Aluminum likes high speed when turning the part, aside from just breaking the edges, you shouldn't need to use sand paper. <br>> <br>> Brian<br>> <br>> --- <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.or<wbr>g</a> wrote:<br>> <br>> From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.o<wbr>rg</a>><br>> To: <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.or<wbr>g</a><br>> Subject: [PSUBS-MAILIST] Finishing O-ring groove<br>> Date: Fri, 8 Sep 2017 19:31:24 +1200<br>> <br>> I have been finishing some internal O-ring grooves in aluminium on the lathe, <br>> with sandpaper.<br>> The grooves are small; 3.4mm x 2mm. There was a bit of chatter after machining.<br>> I am wondering if there is a better way to finish them rather than folding up small<br>> bits of varying grades of sand paper & sticking my hand in the work. ( am being careful)<br>> Maybe an abrasive paste & a bent piece of wire of a similar diameter to the groove?<br>> The hole diameter is 60mm & the groove is only 4mm in from the face, but difficult<br>> to get a straight stick with sandpaper in to it on the correct angle. I have a few to do.<br>> Any suggestions thanks.<br>> Alan<br>> <br>> Sent from my iPad<br>> <br>> ______________________________<wbr>_________________<br>> Personal_Submersibles mailing list<br>> <a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.or<wbr>g</a><br>> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a><u></u><u></u></span></p><div id="m_5421660515006849344m_-7246502037469711931yqtfd84983"><p class="MsoNormal"><span style="color:rgb(38,40,42);font-family:"Helvetica Neue";font-size:10pt"><br>> <br>> <br>> ______________________________<wbr>_________________<br>> Personal_Submersibles mailing list<br>> <a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.or<wbr>g</a><br>> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a><br><br><br>______________________________<wbr>_________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.or<wbr>g</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a><u></u><u></u></span></p></div></div></div></div></div></div></div></blockquote><blockquote style="margin-top:5pt;margin-bottom:5pt"><div><p class="MsoNormal">______________________________<wbr>_________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.or<wbr>g</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a><u></u><u></u></p></div></blockquote></div></div></blockquote><blockquote type="cite"><div><span>______________________________<wbr>_________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.or<wbr>g</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/l<wbr>istinfo.cgi/personal_submersib<wbr>les</a></span><br></div></blockquote></div></div></div><br>______________________________<wbr>_________________<br>
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