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<div>Alan,</div><div>I use a flat file </div><div>Hank</div><div><br></div>
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On Friday, September 8, 2017, 3:21:54 PM MDT, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div dir='ltr'><html><body>Thanks, Brian & James.<br clear="none">Unfortunately Brian I'm getting that little bit of chatter & I am<br clear="none">needing to sand them down. Am also sanding the mating<br clear="none">surfaces; finishing with 1200 grit & oil.<br clear="none">I had thought of the dremel James. Trouble is that for these<br clear="none">small grooves I would need the grinder on the dremel at the<br clear="none">same profile as the O-ring groove. <br clear="none">I might try bending up a peice of wire & hot glueing on <br clear="none">sand paper. <br clear="none">Not a lot I've found about this while Googling!<br clear="none">Alan<br clear="none"><br clear="none">Sent from my iPad<br clear="none"><br clear="none">> On 9/09/2017, at 6:59 AM, 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>> wrote:<br clear="none">> <br clear="none">> Alan, Aluminum likes high speed when turning the part, aside from just breaking the edges, you shouldn't need to use sand paper. <br clear="none">> <br clear="none">> Brian<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> wrote:<br clear="none">> <br clear="none">> From: Alan 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">> To: <a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br clear="none">> Subject: [PSUBS-MAILIST] Finishing O-ring groove<br clear="none">> Date: Fri, 8 Sep 2017 19:31:24 +1200<br clear="none">> <br clear="none">> I have been finishing some internal O-ring grooves in aluminium on the lathe, <br clear="none">> with sandpaper.<br clear="none">> The grooves are small; 3.4mm x 2mm. There was a bit of chatter after machining.<br clear="none">> I am wondering if there is a better way to finish them rather than folding up small<br clear="none">> bits of varying grades of sand paper & sticking my hand in the work. ( am being careful)<br clear="none">> Maybe an abrasive paste & a bent piece of wire of a similar diameter to the groove?<br clear="none">> The hole diameter is 60mm & the groove is only 4mm in from the face, but difficult<br clear="none">> to get a straight stick with sandpaper in to it on the correct angle. I have a few to do.<br clear="none">> Any suggestions thanks.<br clear="none">> Alan<br clear="none">> <br clear="none">> Sent from my iPad<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 class="yqt4938417413" id="yqtfd84983"><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"></div></body></html></div></div>
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