20 Mechanical Principles combined in a Useless Lego Machine

Useless machine that utilizes different mechanical principles. Enjoy!

00:00 Schmidt coupling
00:17 Constant-velocity joint (CV joint)
00:30 Universal joint
00:42 Bevel gears
00:53 Slider-crank linkage
01:08 Sun and planet gear
01:25 Scotch Yoke
01:40 Chebyshev Lambda Linkage
01:58 Chain drive
02:13 Belt drive
02:32 Constant-mesh gearbox
02:50 Oscillating direction changer
03:06 Torque limiter (Lego clutch)
03:19 Winch
03:34 Rack and pinion
03:47 Offset gears
04:00 Uni-directional drive
04:22 Camshaft
04:38 Intermittent mechanism
04:52 Worm gear
05:11 THE FINISHED MACHINE

Thanks to redshoebox, Lego Technic Mastery, 2in1 Bricking and Sariel. Many of these builds are inspired by (shamelessly copied from) their work.

FULL KIT

FREE BUILDING INSTRUCTIONS

BACKUPS FOR DOWNLOADS

MUSIC
HSM Synthesizer Challenge 2 – Clavis Aurea
Anders Enger Jensen

[henrlima]

I would like to point out this machine is not useless: its use is demonstrating 20 mechanical principles 👍

[markpell]

This took me way back in time to 1966 when I was in fourth grade and curious about mechanical linkages. My dad and I were sitting in a restaurant on rotating bar stools with round seats, waiting for a take-out pizza. He used the stools to show me how forces are transmitted by gears and wheels. First sitting right next to each other ("When I spin this way, which way do YOU spin?") then with one or two idlers between us, spinning me around fast when I was correct. We were laughing and having a great time together and I learned from it in a way that stuck with me forever. This demonstration on your channel today gave me some wonderful happy memories of my dad. Thank you!

[fredtorres]

This should be a legit Lego kit for mechanical engineering and industrial design students! Its pure art...

[oliverhilton]

I like how all the individual mechanisms all have their own purpose that shows off what they're designed to do, like:
- The CV joint alows for freedom of movement without altering speed
- The bevel gears allow for a 90 degree change of direction for the power to flow
- The lambda linkage
- The gearbox changes polarity

[lordturtle]

Finally, YouTube doesn't think you're a kids channel anymore.

[ironcito]

This looks so old school, like from the industrial revolution. The machine is only missing a governor spinning around, and perhaps one of those sad-looking steam whistles 😅 Great video!

[iainballas]

I imagine Lego could make quite a bit of money selling "Mechanical Principle Sets", both as massive combined ones to schools, and as individual sets to enterprising engineering students. Having a physical model, especially one you can modularly combine with others, would have helped me ALOT in high school and college.

[_decoeur]

Netflix : Are you still watching ?
Someone son : Slider-Crank linkage

[Cosigner]

With 20 years of industrial maintenance under my belt I can say with 100% certainty and confidence that I've worked on machines with far less lubrication than this one.

[Beebo]

With the world becoming more digitised and discrete, it's nice to see some good old-fashioned analogue mechanical devices.

[PretexAre]

Other than being the most INEFFICIENT power transmission device, it is also the most interesting that I've seen. Great work!

[EnderGrad]

-Hey, where did you learn about these mechanisms from? I thought you went to Art School?
-Uhhhh....

[elementalsigil]

Each one of these was a break through in science for the time. Hard to imagine living before mechanical life.

[crnchi]

If this were to be an actual Lego set, I would 100% buy it.

[notthedroidsyourelookingfo]

Think about how valuable this demonstration would have been a couple centuries ago. So many inventions/discoveries in one place!

[grancoast]

Oh my god, it's the ultimate contraption. The ultra thingamabob, the final doohickey. Amazing

[AngryTicks]

This should be an actual educational set you can buy! I was both thoroughly impressed and entertained by this video.

[Ascendingashes]

Feels like one of those things where you show this to a kid and it'll set him on a path to becoming a mechanical engineer for the rest of his life

[lukearts]

This is the single most technical knowledge condensed into one clear video on all of YT. I've been playing with LT for 35 years now, yet I've never learned so many new things as I did today! Thanks for this, I'll rewatch this over and over again for reference so never delete this video!!!

[USER-joyz]

Brilliant!
Thanks to LEGO designers, engineers, and inventors too!