But he did not call it "a tube that attaches to a vacuum."

See, and I went with Patrick. Oh pop culture. Unless, of course, you are Australian. Then, my warmest regards!

No current hobbyist sintered glass printer can make a vacuum vessel that can withstand the needed negative pressure unless you make the walls prohibitively thick and even then probably not.

edit: Downvoted for objective fact, now you're blocked asshole

You also got CAD experience from this so the next one will be faster too.

Well you've clearly never 3d modelled anything. Especially for a part that has to fit to existing parts, it takes far more time than just making a cylinder.

Yes normally the tube gets inserted into another tube, which is the stuck into another tube or a foot. This leaves a large moment force directly where the tube is pushed into the other tube. Most likely even with careful use, this tube will break very quickly. The layer joint is the weak spot and the type of plastic most likely isn't ideal.

Vacuum cleaner parts are made from a high impact plastic, something that's tough but a bit on the softer side. This way it can take a beating without breaking into a million pieces.

3D printing this is cool and impressive to pull off such a high and narrow print. But practically speaking it makes no sense.

Phone cases should probably be printed in TPU, which really shouldn’t be shattering. (Unless it’s freaking cold outside.

Maximum drop protection. Would come from a hard shell over a squashy TPU case.

There’s really not that much force on these kinds of things, of greater concern is air flow but it looks like op nailed that.

(If op had taken it down to a smaller diameter,, cut outs in the nozzle or somewhere would be be necessary- otherwise the vacuum’s motor has to work too hard to get proper air… and they rely on that flow to cool down.)

It depends on material type, print settings and design itself. While injection molded parts are usually stronger, 3D printed parts can survive a lot of stress if built correctly (some printers are built from 3D printed parts for example). But you are right, OPs tubes might not survive for too long (it will break between layers most likely). I wish it survives for many years tho

On the other hand, 3D printing is not only used to build better and cheaper parts, its a hobby for lot of us. The ability to imagine, create a 3D model and build the part at home makes me feel powerfull. Its almost always better (cheaper, stronger, faster) to use other technologies or just buy something, but where is the fun 😄

You are correct that injection molded plastic is generally stronger than FDM. I have a well tuned printer, and I use a .6mm nozzle which gives better layer adhesion than the standard .4mm while not having to sacrifice too much detail. I also print in a tent to keep the air warm and gain some effect from annealing the plastic which makes prints slightly stronger.