{"id":18388,"date":"2013-06-20T20:58:53","date_gmt":"2013-06-20T18:58:53","guid":{"rendered":"https:\/\/mamchenkov.net\/wordpress\/?p=18388"},"modified":"2013-06-20T20:58:53","modified_gmt":"2013-06-20T18:58:53","slug":"drilling-square-holes","status":"publish","type":"post","link":"https:\/\/mamchenkov.net\/wordpress\/2013\/06\/20\/drilling-square-holes\/","title":{"rendered":"Drilling Square Holes"},"content":{"rendered":"<!-- google_ad_section_start -->\n<p><a href=\"http:\/\/upper.us.edu\/faculty\/smith\/reuleaux.htm\">Drilling Square Holes<\/a><\/p>\n<p>WOW!<\/p>\n<blockquote><p>A bit that drills square holes &#8230; it defies common sense. How can a revolving edge cut anything but a circular hole? Not only do such bits exist (as well as bits for pentagonal, hexagonal and octagonal holes), but they derive their shape from a simple geometric construction known as a Reuleaux triangle (after Franz Reuleaux, 1829-1905).<\/p><\/blockquote>\n<p>Wikipedia has some more info on <a href=\"http:\/\/en.wikipedia.org\/wiki\/Reuleaux_triangle\">Reuleaux triangle<\/a>.<\/p>\n<!-- google_ad_section_end -->\n","protected":false},"excerpt":{"rendered":"<!-- google_ad_section_start -->\n<p>Drilling Square Holes WOW! A bit that drills square holes &#8230; it defies common sense. How can a revolving edge cut anything but a circular hole? Not only do such bits exist (as well as bits for pentagonal, hexagonal and octagonal holes), but they derive their shape from a simple geometric construction known as a &hellip; <a href=\"https:\/\/mamchenkov.net\/wordpress\/2013\/06\/20\/drilling-square-holes\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Drilling Square Holes<\/span><\/a><\/p>\n<!-- google_ad_section_end -->\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"link","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[1,62],"tags":[1101,655],"keyring_services":[],"class_list":["post-18388","post","type-post","status-publish","format-link","hentry","category-general","category-technology","tag-math","tag-science","post_format-post-format-link"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":8403,"url":"https:\/\/mamchenkov.net\/wordpress\/2005\/01\/02\/the-big-bounce\/","url_meta":{"origin":18388,"position":0},"title":"The Big Bounce","author":"Leonid Mamchenkov","date":"January 2, 2005","format":false,"excerpt":"Watched \"The Big Bounce\" on DVD. It is a very light movie with bits of crime, comedy, and romance. The events pictured take place in Hawaii and thus avoid anything remotely serious in nature. There are no car chaces, impressive fights, or lots of swearing. Even the \"The Big Bounce\"\u2026","rel":"","context":"In &quot;All&quot;","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8472,"url":"https:\/\/mamchenkov.net\/wordpress\/2005\/01\/13\/reign-of-fire\/","url_meta":{"origin":18388,"position":1},"title":"Reign of Fire","author":"Leonid Mamchenkov","date":"January 13, 2005","format":false,"excerpt":"Watched Reign of Fire on DVD. One word to describe this film - unfinished. Unfinished as in work in progress. The original idea is good, but the plot has many holes and lacks details. There is no character development what-so-ever. Some good special effects with the dragons, but also need\u2026","rel":"","context":"In &quot;All&quot;","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":8703,"url":"https:\/\/mamchenkov.net\/wordpress\/2005\/03\/12\/the-sweetest-thing\/","url_meta":{"origin":18388,"position":2},"title":"The Sweetest Thing","author":"Leonid Mamchenkov","date":"March 12, 2005","format":false,"excerpt":"Once in a while I still get a chance to watch a movie. Today it was \"The Sweetest Thing\". IMDB rating: 4.7 My rating: 6.5 Celebrity highlights: Cameron Diaz, Christina Applegate, Selma Blair. \"The Sweetest Thing\" is a very nice and easy going comedy. The story is pretty simple and\u2026","rel":"","context":"In &quot;All&quot;","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":9443,"url":"https:\/\/mamchenkov.net\/wordpress\/2005\/09\/12\/criminal\/","url_meta":{"origin":18388,"position":3},"title":"Criminal","author":"Leonid Mamchenkov","date":"September 12, 2005","format":false,"excerpt":"Random pick from a random pyle - \"Criminal\". Directed by: Gregory Jacobs Genres: Drama, Comedy, Crime Cast: John C. Reilly, Diego Luna, Maggie Gyllenhaal, Peter Mullan, Zitto Kazann, Jonathan Tucker, Laura Cer\u00f3n, Soledad St. Hilaire, Ellen Geer, Brandon Keener, Nick Anavio, Deborah Van Valkenburgh, Maeve Quinlan, Brent Sexton, Malik Yoba\u2026","rel":"","context":"In &quot;3 stars&quot;","block_context":{"text":"3 stars","link":"https:\/\/mamchenkov.net\/wordpress\/category\/movies\/movie-reviews\/3-stars\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mamchenkov.net\/wordpress\/wp-content\/uploads\/2005\/09\/criminal-390x500.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":11758,"url":"https:\/\/mamchenkov.net\/wordpress\/2009\/09\/08\/g-i-joe-the-rise-of-cobra\/","url_meta":{"origin":18388,"position":4},"title":"G.I. Joe: The Rise of Cobra","author":"Leonid Mamchenkov","date":"September 8, 2009","format":false,"excerpt":"The other day I went to see \"G.I. Joe: The Rise of Cobra\", which turned out to be the silliest movie I've watched in a while.\u00a0 Numerous special effects could feel the holes in the story and poor acting.\u00a0 And further down the road, all those special effects became nothing\u2026","rel":"","context":"In &quot;2 stars&quot;","block_context":{"text":"2 stars","link":"https:\/\/mamchenkov.net\/wordpress\/category\/movies\/movie-reviews\/2-stars\/"},"img":{"alt_text":"G.I. Joe: The Rise of Cobra","src":"https:\/\/i0.wp.com\/mamchenkov.net\/wordpress\/wp-content\/uploads\/2009\/09\/g_i_joe_the_rise_of_cobra.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":8670,"url":"https:\/\/mamchenkov.net\/wordpress\/2005\/02\/27\/welcome-home\/","url_meta":{"origin":18388,"position":5},"title":"Welcome home","author":"Leonid Mamchenkov","date":"February 27, 2005","format":false,"excerpt":"Continuing the line of welcoming posts, I would like to welcome Max home. We left the clinic today and went on to our stressful journey. I never thought that I would be so scared to drive the car. I was watching everyone and everything much more attentively than usual. I\u2026","rel":"","context":"In &quot;All&quot;","block_context":{"text":"All","link":"https:\/\/mamchenkov.net\/wordpress\/category\/general\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts\/18388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/comments?post=18388"}],"version-history":[{"count":0,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/posts\/18388\/revisions"}],"wp:attachment":[{"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/media?parent=18388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/categories?post=18388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/tags?post=18388"},{"taxonomy":"keyring_services","embeddable":true,"href":"https:\/\/mamchenkov.net\/wordpress\/wp-json\/wp\/v2\/keyring_services?post=18388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}