{"id":132,"date":"2019-10-16T15:30:00","date_gmt":"2019-10-16T22:30:00","guid":{"rendered":"https:\/\/sling2.slantalpha.com\/wp\/?p=132"},"modified":"2019-10-19T09:06:20","modified_gmt":"2019-10-19T16:06:20","slug":"process-for-rivnut-mounting-hole-enlargement","status":"publish","type":"post","link":"https:\/\/sling2.slantalpha.com\/wp\/?p=132","title":{"rendered":"Process for Rivnut Mounting Hole Enlargement"},"content":{"rendered":"\n<p>Before I can accomplish Step 1 in my build, I&#8217;ll need to enlarge some holes to accommodate larger M4 fasteners. At some point, TAF changed from M3 to M4 size rivnuts for the vertical stabilizer and other empennage sub-assemblies.<\/p>\n\n\n\n<p>The m4 rivnuts have been supplied with the empennage sub-kit, but the formed parts haven&#8217;t been revised to accept them. The build instructions have yet to be updated. Correspondence with TAF confirmed that I will need to do hole enlargement. As the builder, it&#8217;s up to me to determine how. This involves tracking down proper tools and developing confidence in a process.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sling2.slantalpha.com\/wp\/wp-content\/uploads\/2019\/10\/IMG_3313-1024x768.jpg\" alt=\"\" class=\"wp-image-135\" srcset=\"https:\/\/sling2.slantalpha.com\/wp\/wp-content\/uploads\/2019\/10\/IMG_3313-1024x768.jpg 1024w, https:\/\/sling2.slantalpha.com\/wp\/wp-content\/uploads\/2019\/10\/IMG_3313-300x225.jpg 300w, https:\/\/sling2.slantalpha.com\/wp\/wp-content\/uploads\/2019\/10\/IMG_3313-768x576.jpg 768w, https:\/\/sling2.slantalpha.com\/wp\/wp-content\/uploads\/2019\/10\/IMG_3313-624x468.jpg 624w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>The TAF KAI calls for rivnut mounting holes to be as tight as is practicable and I&#8217;ve concluded that a size #A straight flute chucking reamer is the right size to achieve that. This results in the final diameter just under a nominal 6,0mm mounting hole size commonly specified for M4 rivnuts.<\/p>\n\n\n\n<p>I found reaming from #12 to #A size was best done in 2 steps. First, #3 and then #A. This allows the beveled tip of the reamer to align and track nicely with the existing hole as I hold the part by hand and feed the reamer using my drill press at about 750 rpm.<\/p>\n\n\n\n<p>There are also holes for the corresponding screws that will have to be enlarged, once I&#8217;ve identified each of them and established what fit clearance is best.<\/p>\n\n\n\n<p>I&#8217;ve acquired reamers, developed the process and adequately demonstrated the skills to myself. I haven&#8217;t actually started on the build yet, but it feels good to see some aluminum chips in the shop. I&#8217;m very close to Build Day 1.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Before I can accomplish Step 1 in my build, I&#8217;ll need to enlarge some holes to accommodate larger M4 fasteners. At some point, TAF changed from M3 to M4 size rivnuts for the vertical stabilizer and other empennage sub-assemblies. The m4 rivnuts have been supplied with the empennage sub-kit, but the formed parts haven&#8217;t been [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8,4],"tags":[15,16,21,23,14,22],"acf":[],"_links":{"self":[{"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/132"}],"collection":[{"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=132"}],"version-history":[{"count":11,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/132\/revisions"}],"predecessor-version":[{"id":144,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=\/wp\/v2\/posts\/132\/revisions\/144"}],"wp:attachment":[{"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sling2.slantalpha.com\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}