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<p>Notes by Shawna 04/15/08 10:09</p><p>Machine Shop 2 Machining Skills for Prototype Development:</p><p>10:10 1) Basic 2 drill & tap heads</p><p>10:11 2) Drilling Holes larger aspect ratio (thicker) use cutting fluid b/c chips have harder time clearing the drill keeps chips cool and lubricates them so they slide out of hole. chatter caused by drill jumping around hole: running drill too fast. may need to change transmission ratio for diff sized bits if there is chatter that speed change will not fix. if levers don't shift, something needs to turn, either motor or spindle. step-up drill size. sensitive chuck for hand feeding very small bits… very cool.</p><p>10:30 3) Special Drills for Plastics and Hard or Abrasive Materials softer materials: high helix angle of normal bit will dig down and possibly pull part up out of device when used with some materials ie. plastics lower helix angle will scrape rather than cut allows safe drilling of materials that may tend to be lifted up hard materials: steel, ciruit boards (fiberglass) use tunsgton carbide drill.</p><p>10:34 4) Drill Press Limitations chatter when used as milling machine.. irregularities. lack of stiffness cannot handle the load of an arbor press (sp??)</p><p>10:38 5) Bandsaw cut down larger peices of stock to near net size of part you want to make narrow blade makes it possible to cut curves. 3 teeth always in contact with part.. otherwise risk damaging blade noise of using a coarse blade can be danger to those in shop… 10:42</p><p>10:43 6) Suitable Speeds, Feeds and Materials</p><p>10:51 7) Bandsaw Setup proper handling & blade guard guidance… 10:52 posture, stand squarely, hands firm on bed of machine. safe handling & proper hand placement. until 10:54</p><p>10:54 8) Using the Drill Press Vise round stock. use vice to avoid getting cut by spinning part</p><p>10:56: end.</p>
Posted on 2008-10-27 12:12:39 -0400 by Anonymous User
<p>bandsaw guard detail in section 7</p>
<p>Never allow any part of your body to contact the blade of any machine while the machine is energized. if you need to contact the blade, disconect the power source. Essentially, this person has just bet his fingers on a ten dollar switch.</p>
Posted on 2009-03-10 16:57:03 -0400 by Anonymous
<p>That applies to non-round stock also .</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:46:09
<p>Just have to get one stuck in your finger once. Then you don’t do it anymore.</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:15:45
<p>Aluminum chips are relatively safe if you are gentle. If you rip out the chips or ribbon it will cut you up.</p>
<p>Wrong title here</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:45:00
<p>No, this is the correct title.</p>
<p>some chattering..should use a finer blade for steel…</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:38:07
<p>End of video.</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:46:28
<p>Huh? Oh, I get it. You’ve never worked in a machine shop that did production work.</p>
<p>No! No! No! Never remove chips and turnings with your bare hands. Use a chip brush or pliers.</p>
<p>There’s still things to learn</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:56:11
<p>I am about to fall aslee…zzzz</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:16:45
<p>don’t put that!</p>
<p>Why it go blank???</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:51:46
<p>Will be nice if teacher mentions the type of lubricant used</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:17:04
<p>These videos accompany a course at <span class="caps">MIT</span></p>
<p>Some of the previous comments were inaccurate… need to pay more attention ;)</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:57:21
<p>for a begginer this series of videos is awesome.</p>
Posted on 2010-09-09 04:35:55 -0400 by Anonymous 00:25:56
<p>If your still watching this, you may want to consider moving on to the next video. :)</p>
<p>Check out the quill movement -</p>
Posted on 2011-04-01 13:22:22 -0400 by Anonymous 00:27:27
<p>You can see the chuck really bouncing along here</p>
Posted on 2011-04-01 13:23:28 -0400 by Anonymous 00:27:40
