Last year, we saw [How To Make Everything’s] take on [DaVinci’s] machine for cutting threads. However, they stopped short of the goal, which was making accurate metal screw threads. After much experimentation, they have a working solution. In fact, they tried several different methods, each with varying degrees of success.
Some of the more unusual methods included heating a bar red hot and twisting it, and casting a screw out of bronze. The last actually worked well with a normal screw as the mold, although presumably, a good wood or wax shape would have resulted in a workable mold, too.
The real goal, though, was to make the DaVinci machine more capable on its own. The machine uses leadscrews and can cut its own leadscrews, so, in theory, if you improve the machine, it can cut better components for itself, which may make it possible to cut even better leadscrews.
The reality was the machine required some significant rework to correctly cut metal threads. But it does, as you can see in the video below. With some additional scaling of gears, they were able to cut a 20 TPI threaded rod that would take an off-the-shelf nut.
If you missed the original post on the machine, you can still go back and read it. Of course, once you have a threaded rod, you are just a few steps away from a tap, too.
Erm…Interesting? The stories are very predictable. I know exactly what’s going to happen when the young woman gets stuck in the washing machine and her step brother is nearby!
What a classless and crass comment you’ve left, and yet you’re complaining about “me me me” content creators.
On the one hand you’re right, on the other hand it shouldn’t take 20 minutes to explain a basic machine – videos are getting longer for financial / algorithm pleasing reasons not because there’s an abundance of useful things to say.
Longest zoomer attention span
threaded fasteners were indipendently invented at least two times
the Inuit used threads to attach different spear heads, for hunting specific species, the Inuit also indipendently invented many technologys, and are the sole inventors of others.
Living in the high artic requires a level of intelligence and pragmatism
and other qualities, just for survival, and the Inuit not only survived, but thrived.Nice people too.Too bad they and Davinci never got to meet.
I can easily keep my focus watching Van’s 2002 House of Detention for the 20th time, but I just can’t give a toss about those predictable “AMAZING HIDDEN TRUTH ANCIENT INVENTION” youtube mockumentaries.
DeVinci woulda just went to Home Depot and bought some screws. The End.
Not sure why they are re-hashing, sorry, independently reinventing work Maudsley did 225 years ago perfecting the screw cutting lathe – a machine that can make it’s own lead screw.
Maudslay (Maudsley was a serial killer)
Ironic
Because you don’t understand the point of the show it seems
(guy turns on hot ones)
why are they eating hot wings
Reinventing the wheel is valuable, because it turns out that it actually requires practice (as seen by their earlier attempts and failures). People tend to intellectualize early technology and assume knowing is the same as doing, when that couldn’t be further from the truth. Try starting fire by friction: it’s just two sticks, right? Should be easy. It’d be a shame if everyone thought like that and then the lights went out.
Right, I think there is always(often?) an underlaying sentiment about lost knowledge here. Assuming everything will just be available forever and we don’t need to look back is a pitfall.
Industrial fasteners and lead screws are typically made by roll forming, single point lathe cutting, or die cutting to insure their strength and functionality. Fitting in a nut is fine for a no load attachment. Not rated for loading.
The importance of accurate screw threads isn’t primarily about fastening. Screws give you the means of precise motion, coupling linear motion to a gear train, and precise measurement. They are a foundational technology to producing precision machines of all kinds. Their ability to work as load bearing fasteners is important, but once you have an accurate lead screw for positioning you can fairly easily build a lathe to do make fasteners.