My senior years off to a start with the third course in the Drafting series: 3D Modeling. It has been a while, as last year I decided to change it up by taking Applications of Engineering, that was definitely a different experience and I am excited to get back to the heart of engineering: drafting.
I jumped right into the curriculum this year with threads! I started by calculating the tolerances and allowances of the hole and shaft and then finding the maximum and minimum clearance/interference. Though this is not hard, it is very tedious because the numbers are to thousands of an inch and easily mixed up. After working with this some I moved on to threads, learning about the different kinds and their uses, along with other thread properties. Ever heard of "lefty losie, righty tighty"? I am sure you have. This is true for most screws which have right handed threads, but some screws are made with left handed threads, though, from my understanding left handed threads are mostly used in mechanisms. The toilet handle for example, has a left handed thread so that when the handle is pushed down the screw is not loosened. And this is just SOME of the information I have learned so far, along with this, I have already learned how to draw a Hex Head Bolt with a standard thread and am working on another with an ACME thread. It was pretty intimidating at first, but I found drawing a thread by hand was much easier than it looked once I knew what I was doing.
So here's my first drafted thread and my second one is on the way--so stay tuned for more exciting informational drafting!
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