<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1487989897172_5983"><span>Alan,</span></div><div id="yui_3_16_0_1_1487989897172_5983"><span id="yui_3_16_0_1_1487989897172_6036">Try a parting tool, works for me.</span></div><div id="yui_3_16_0_1_1487989897172_5983"><span>Hank</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Friday, February 24, 2017 6:53 PM, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container">Thanks Brian & Hank,<br clear="none">it was the outer egdes that I left sharp.<br clear="none">It didn't cut nicely, it left a raised mound on the edge that I removed with a facing tool.<br clear="none">I will either look in to a specific groove tool or better equipment for forming the<br clear="none">tool as these are taking too long :(<br clear="none">Alan<br clear="none"><br clear="none">Sent from my iPad<br clear="none"><br clear="none">> On 25/02/2017, at 1:49 PM, 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">> <br clear="none">> Don't need carbide for aluminum, did it cut nicely, aluminum likes high speed<br clear="none">> <br clear="none">> brian<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> 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] O-ring groove machining<br clear="none">> Date: Sat, 25 Feb 2017 12:41:39 +1300<br clear="none">> <br clear="none">> Am cutting some small o-ring grooves in aluminum, 3.4mm x 2mm deep for<br clear="none">> a 2.5mm D o-ring. ( 10th of an inch) What is the best way to remove the sharp <br clear="none">> corners of the grove? I have read that you can spin your work in the lathe<br clear="none">> & sand with 200 & then 400 grit sand paper. Is this right?<br clear="none">> Have been having fun making the tool for this & don't think I have done a <br clear="none">> good job! Am I best to buy a carbide tool specific for this job.<br clear="none">> Thanks, 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="yqt3840559892" id="yqtfd26310"><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><br><br></div> </div> </div> </div></div></body></html>