<html><head></head><body><p dir="ltr">Hank - are you talking about a conical frustum viewport / seat combination? If so, two degrees is too loose. Major diameter of the window should be machined to +0.000/-0.002 *Do (nominal outer diameter), and the included conical angle within +0.25/-0.000 degrees of the nominal value. The included conical angle of the window seat should be within +0.000/-0.25 degrees of the nominal angle.</p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On July 14, 2016 5:01:48 PM MDT, hank pronk 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:12px"><div id="yui_3_16_0_1_1468536619377_2565" dir="ltr">Hi All, Help!</div><div id="yui_3_16_0_1_1468536619377_2565" dir="ltr">I am allowed up to 2 degrees angular mismatch between the port and the seat. The conical bearing surface is 4.875 inches and I want to know how large the gap can be at the outer circumference of the port with a 2 degree mismatch. </div><div id="yui_3_16_0_1_1468536619377_2565" dir="ltr">Hank</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>