The BEST Material for SNAP FIT JOINTS with 3D Printing!

[@unionse7en]

The geometry of the flex is very important, avoid stress concentrations, spread the flex over larger areas/lengths

[@zk_6312]

Great video on snaps. It gives me an idea for something I was working on. Of course if there is room you could not use a snap at all and use some of those tiny round magnets.

[@EngineersGrow]

Agree! Recently I worked on a design that had to use a very thin plate as a clamp. Those tiny round magnets was the perfect solution for the clamping force.

[@lunarthief6501]

Thank you this and the other snap video. Petg is my go to material and I see its perfect for snaps as well. I hate using glue and want to tey getting away from screws so this is extremely helpful.

[@EngineersGrow]

You're welcome!

[@kerryhatcher]

Thanks!! I needed this for something I’m working in right now.

[@EngineersGrow]

Glad I could help!

[@woeisfiq]

Nice informative video. Can you do a tutorial video with a sample design that involves the calculation that doesn't exceed the 10 to 15%? Thanks!

[@EngineersGrow]

Thanks for the feedback! Made a note of it. Here's a video that shows what dimensions can be adjusted to decrease the stress and strain of a snap fit hook. kzbin.info/www/bejne/Y5vKk5duh7qbnrs

[@MyTechFun]

Hard TPU, easy for printing, wear resistant, flexible and minimal permanent deformation.

[@EngineersGrow]

Good point Igor! I've used armadillo before for hard gaskets but not snaps.

[@Erhannis]

How do you calculate % elongation, practically? In your snap example, you have more an angle than a distance. Looking at distance, you could try, say, pivoting the snap hook on the point of its base at the outer edge and measuring the new length of the inner edge vs the old length, but that seems unlikely to be accurate - likely too optimistic.

[@EngineersGrow]

Here's a pdf that goes through the calculations. Page 9. Top left equation is applicable for this geometry. fab.cba.mit.edu/classes/S62.12/people/vernelle.noel/Plastic_Snap_fit_design.pdf

[@isoutoforbit]

For an object that often comes in contact with water, would PETG be better than nylon?

[@EngineersGrow]

It depends on your application. But in general, nylon would still be better for a snap. The water will reduce the strength and stiffness, but in increase elongation of nylon. Water in nylon is typically a problem during the 3D printing or molding process.

[@isoutoforbit]

​@@EngineersGrow thanks for the reply, so is being hydroscopic mainly an issue for the filament itself and not so much after printing? I'm new to 3D printing and working on a project that's similar to a plant pot, so would be in contact with water for prolonged periods of time. I was under the impression that any hydroscopic filament wouldn't work, but I'll test out the snap with PETG first and see how it goes and then consider Nylon as well.

[@EngineersGrow]

Welcome to 3D printing! Correct. Sounds like PETG is a good choice for you. For Nylon keep in mind that larger parts are harder to print without warping.

[@isoutoforbit]

@@EngineersGrow Thanks! :)

[@cybermindman]

The information was gold, but just one tip: improve your mic, the audio is not helping.

[@Erhannis]

FWIW, I didn't notice anything about the audio. I'll grant that doesn't mean it can't be improved.

[@cybermindman]

@@Erhannis For me, the volume of the voice was oscilating during the speak, like if the mic was losing the capture by the movement of the gestures. But it´s only a friendly tip to pay attention. The quality of the video, the information and all the rest is perfect. I really wish success to people that share knowlege to the world. PS: sorry for my poor english, it´s not my native language. I´m from Brazil.😅

[@EngineersGrow]

Thanks for the feedback! Working on improving audio over the next several videos.

[@kevinwolfe371]

🤣 ƤＲＯ𝓂Ｏ𝕤ᗰ