Notes by Shawna 04/15/08 10:09

Machine Shop 2 Machining Skills for Prototype Development:

10:10 1) Basic 2 drill & tap heads

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.

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.

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??)

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

10:43 6) Suitable Speeds, Feeds and Materials

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

10:54 8) Using the Drill Press Vise round stock. use vice to avoid getting cut by spinning part

10:56: end.

Posted 8 years by Anonymous User

bandsaw guard detail in section 7

Posted 8 years by Anonymous User

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.

Posted almost 8 years by Anonymous

Aluminum chips are relatively safe if you are gentle. If you rip out the chips or ribbon it will cut you up.

Posted over 6 years by Anonymous 00:15:45

Some of the previous comments were inaccurate… need to pay more attention ;)

Posted over 6 years by Anonymous 00:57:21

These videos accompany a course at MIT

Posted over 6 years by Anonymous 00:17:04

Will be nice if teacher mentions the type of lubricant used

Posted over 6 years by Anonymous 00:17:04

No! No! No! Never remove chips and turnings with your bare hands. Use a chip brush or pliers.

Posted over 6 years by Anonymous 00:15:45

Huh? Oh, I get it. You’ve never worked in a machine shop that did production work.

Posted over 6 years by Anonymous 00:15:45

Just have to get one stuck in your finger once. Then you don’t do it anymore.

Posted over 6 years by Anonymous 00:15:45

for a begginer this series of videos is awesome.

Posted over 6 years by Anonymous 00:25:56

Wrong title here

Posted over 6 years by Anonymous 00:45:00

No, this is the correct title.

Posted over 6 years by Anonymous 00:45:00

some chattering..should use a finer blade for steel…

Posted over 6 years by Anonymous 00:38:07

Why it go blank???

Posted over 6 years by Anonymous 00:51:46

That applies to non-round stock also .

Posted over 6 years by Anonymous 00:46:09

If your still watching this, you may want to consider moving on to the next video. :)

Posted over 6 years by Anonymous 00:56:11

There’s still things to learn

Posted over 6 years by Anonymous 00:56:11

I am about to fall aslee…zzzz

Posted over 6 years by Anonymous 00:16:45

don’t put that!

Posted over 6 years by Anonymous 00:16:45

End of video.

Posted over 6 years by Anonymous 00:46:28

Check out the quill movement -

Posted almost 6 years by Anonymous 00:27:27

You can see the chuck really bouncing along here

Posted almost 6 years by Anonymous 00:27:40

hmm. interesting. I’ve never seen one of those before!

Posted 4 years by Anonymous 00:19:59

Looks like mineral oil based, water miscable cutting fluid

Posted 4 years by Anonymous 00:17:21

Albrecht chuck, German made

Posted 4 years by Anonymous 00:20:19

the is really cool

Posted almost 4 years by Anonymous 00:00:16

insert here

Posted over 2 years by Anonymous 00:00:00