<html><head></head><body><p dir="ltr">Alan, do you have a copy of the Parker O-ring handbook? Best free resource out there for designing O-ring seals. ORD5700.pdf Download it from the Parker website.</p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On February 5, 2017 6:32:51 PM MST, Alan James via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1486343895596_2802"> Hi,</div><div id="yui_3_16_0_ym19_1_1486343895596_2793" dir="ltr">am having trouble Googling an answer to this question.</div><div id="yui_3_16_0_ym19_1_1486343895596_2551" dir="ltr"> I have an O-ring groove in the bore of my light housing, sealing</div><div id="yui_3_16_0_ym19_1_1486343895596_2792" dir="ltr">between the bore & the side of my acrylic lens as per attached diagram.</div><div id="yui_3_16_0_ym19_1_1486343895596_2791" dir="ltr">On a piston O-ring groove it calls for an optimal 2% stretch & not more than 5%.</div><div id="yui_3_16_0_ym19_1_1486343895596_2886" dir="ltr">I can't find any reference to what stretch if any should be, if any, for an o-ring</div><div id="yui_3_16_0_ym19_1_1486343895596_2888" dir="ltr">in a bore groove. I did see that in a rotary
application they don't advice that</div><div id="yui_3_16_0_ym19_1_1486343895596_2874" dir="ltr">their should be any pressure on the rotating rod.</div><div id="yui_3_16_0_ym19_1_1486343895596_2887" dir="ltr">Should I be designing so that the o-ring will have a 2% stretch around the lens?</div><div id="yui_3_16_0_ym19_1_1486343895596_2918" dir="ltr">Thanks, Alan</div></div><p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Personal_Submersibles mailing list<br />Personal_Submersibles@psubs.org<br /><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br /></pre></blockquote></div></body></html>