{"version": "1.0", "type": "rich", "title": "Tell us about the helical geeeaaarrrss", "author_name": "kontextmaschine", "author_url": "https://kontextmaschine.com", "provider_name": "kontextmaschine", "provider_url": "https://kontextmaschine.com", "url": "https://kontextmaschine.com/post/633000276210647040/", "html": "<div class=\"question\"><strong>Anonymous</strong> asked: <p>Tell us about the helical geeeaaarrrss</p></div>\n<p><a class=\"tumblr_blog\" href=\"https://andmaybegayer.tumblr.com/post/632998501011374080/tell-us-about-the-helical-geeeaaarrrss\">andmaybegayer</a>:</p>\n\n<blockquote><p>Alright you asked for it.</p><p>The most basic kind of gear your probably know is the Involute Spur gear. It\u2019s one of these bad boys.</p><div class=\"npf_row\"><figure class=\"tmblr-full\" data-orig-height=\"741\" data-orig-width=\"982\"><img src=\"/media/437e732d545b16ec0dfbf0b441e03ff7fabcd5ec_fc5c9eec4c56.png\" data-orig-height=\"741\" data-orig-width=\"982\" alt=\"image\" srcset=\"/media/e10a1d056d607e6d5c69f0119b2c5fe5e2c998cb_f71e04ddad69.png 75w, /media/2f27987e47aabfc5358c5a34a1d847cf3e091eb4_8dba68beab63.png 100w, /media/18d21bd0d9d79d58ac9c04a6b695d96bc5ab23a1_672e7c6bd6b0.png 250w, /media/d253f3b990cdc46bf011f60f2cc814e8c07039dc_faf3717530dd.png 400w, /media/6ba9e0e6d85d5c013a52ee29137ccbb8a201ef5f_8360f100fc9d.png 500w, /media/3418d30af24cb0b0df3f77f4e124129eb3b9fa9f_ed59aea8f9a8.png 540w, /media/437e732d545b16ec0dfbf0b441e03ff7fabcd5ec_fc5c9eec4c56.png 640w, /media/76beb7f23aab6a40c03bef92c382cd14c55fbb02_7d026261b390.png 982w\" sizes=\"(max-width: 982px) 100vw, 982px\"/></figure></div><p>If you want more details on the purpose of gears, I would recommend <a href=\"https://kremlin.enterprises/post/616163773634494464/explain-to-me-how-gears-are-machined\" target=\"_blank\"><b>tumblr user kremlin_t\u2019s excellent post on gear cutting</b></a>. I\u2019ll cover the important stuff in brief here but I\u2019ll be skipping some explanations.</p><p>The fundamental purpose of a modern precision gear is to allow a wheel to spin smoothly against another different sized wheel to transmit torque as efficiently as possible, especially along with a gearing ratio to adjust speed and torque. The involute-tooth solves the most important problem in gears, which is how to make a tooth shape that transmits power smoothly without speeding up and slowing down all over the place. It does this by ensuring that there\u2019s a straight line along which power is transmitted when the teeth mesh. I will now do what everyone does and borrow That One GIF off wikipedia to show you how this works.</p><figure data-orig-height=\"256\" data-orig-width=\"256\"><img src=\"/media/110bbd480df1ebff804e4561284002b197a27473_72374c725711.gif\" data-orig-height=\"256\" data-orig-width=\"256\" alt=\"image\" srcset=\"/media/33ba28cecb02c835ee7fda4a24701805bf6531d7_b6330d665bf4.gif 75w, /media/fcb119cf800e588ca6ac3f2d08c83f65f4a49a26_a0688ec8cb3b.gif 100w, /media/de8496b47f54086eb5b872a33b71f1eaf9b51b48_18ecdad83811.gif 250w, /media/1755188a273082cb2c1fef2706a79d2d9d0da55d_000222d1aaf8.gif 256w\" sizes=\"(max-width: 256px) 100vw, 256px\"/></figure><p>That arrow line shows where ideal involute gear touch and the axis along which power is transmitted. You can see that it\u2019s held at a stead angle and it moves at a constant speed, which is important: this means that no matter what size a gear is and which point in the rotation you are, turning one degree on the input gear will always produce the same rotation on the output gear. If this wasn\u2019t true, precision machines wouldn\u2019t be able to rely on gears, and high speed machines would suffer bumpy irregular operation.</p><p><a class=\"tmblr-truncated-link read_more\" href=\"https://andmaybegayer.tumblr.com/post/632998501011374080/tell-us-about-the-helical-geeeaaarrrss\" target=\"_blank\">Keep reading</a></p></blockquote>", "thumbnail_url": "https://kontextmaschine.com/media/437e732d545b16ec0dfbf0b441e03ff7fabcd5ec_fc5c9eec4c56.png", "thumbnail_width": 640, "thumbnail_height": 483}