{"id":3435,"date":"2015-11-12T19:07:01","date_gmt":"2015-11-13T00:07:01","guid":{"rendered":"http:\/\/www.summet.com\/blog\/?p=3435"},"modified":"2015-11-12T22:25:22","modified_gmt":"2015-11-13T03:25:22","slug":"rivaling-mill-accuracy-with-a-printed-template-and-centerpunch","status":"publish","type":"post","link":"https:\/\/www.summet.com\/blog\/2015\/11\/12\/rivaling-mill-accuracy-with-a-printed-template-and-centerpunch\/","title":{"rendered":"Rivaling mill accuracy with a printed template and centerpunch"},"content":{"rendered":"<p>Using a printed template you can center punch drill pilot holes and rival the accuracy of a milling machine. It&#8217;s faster than using a mill, and a lot cheaper as well!<br \/>\n<iframe loading=\"lazy\" width=\"480\" height=\"360\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/P2nyloLHKI0?rel=0\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>While making the busbars for my Nissan Leaf batteries, I needed to precisely drill holes with 1.3333&#8243; centers.  I&#8217;m fortunate enough to own a small mill, which I used to drill small pilot holes, allowing me to drill the main holes on a drillpress very accurately.<\/p>\n<p>But what if you don&#8217;t have a mill?  You can actually get similar accuracy by using a<br \/>\nprinted template and careful application of a centerpunch. Just create a template in<br \/>\na drawing program such as InkScape, Corell Draw, or any other tool that allows you to<br \/>\nlay out lines in a dimensionally accurate way.  Print it out on a standard printer, and<br \/>\nthen use a center punch to mark the drill starting point on your metal.<\/p>\n<p><a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_results.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_results-1024x768.jpg\" alt=\"center_punch_results\" width=\"584\" height=\"438\" class=\"alignnone size-large wp-image-3436\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_results-1024x768.jpg 1024w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_results-300x225.jpg 300w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_results-400x300.jpg 400w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n<p>Here you can see me comparing the holes in my milled busbar with the center-punched busbar by passing some bolts through two of the three holes and shooting a picture of the third hole.  <\/p>\n<p><a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_to_mill_hole_aligment.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_to_mill_hole_aligment-1024x768.jpg\" alt=\"center_punch_to_mill_hole_aligment\" width=\"584\" height=\"438\" class=\"alignnone size-large wp-image-3437\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_to_mill_hole_aligment-1024x768.jpg 1024w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_to_mill_hole_aligment-300x225.jpg 300w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2015\/11\/center_punch_to_mill_hole_aligment-400x300.jpg 400w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using a printed template you can center punch drill pilot holes and rival the accuracy of a milling machine. It&#8217;s faster than using a mill, and a lot cheaper as well! While making the busbars for my Nissan Leaf batteries, &hellip; <a href=\"https:\/\/www.summet.com\/blog\/2015\/11\/12\/rivaling-mill-accuracy-with-a-printed-template-and-centerpunch\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-3435","post","type-post","status-publish","format-standard","hentry","category-commentary"],"_links":{"self":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/3435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/comments?post=3435"}],"version-history":[{"count":5,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/3435\/revisions"}],"predecessor-version":[{"id":3455,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/3435\/revisions\/3455"}],"wp:attachment":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/media?parent=3435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/categories?post=3435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/tags?post=3435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}