Hexagonal nuts as heat set (thermal) threaded inserts into 3D printing
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- Опубликовано: 14 июл 2024
- In this video I am testing can I use hexagonal screw nuts as thermal (heat set) inserts into 3D printed objects. I am doing some comparison with existing brass inserts measuring the pull-out force.
There are some other load types, like torque and main load from other, supported, side, but only pull out force is measured, since this is the weak point for these hex nuts as thermal inserts. In first part of video I am testing, how big hole I need for inserting hex nuts using a soldering iron (200°C). In other part I am comparing hex nuts to existing injection molding and 3D printing brass inserts.
Contents
0:00 - Introduction
3:36 - Preparing hex nut tests (what hole size?)
5:21 - Pull out test with hex nuts
6:45 - Result of the first test
6:55 - Preparing second test (nuts and brass inserts)
7:51 - Pull out tests (nuts and brass inserts)
7:59 - Hex nut test
8:33 - Injection molding insert test
9:21 - 3D printing insert test
10:41 - Results from test 2
11:15 - Conclusions
Matherials and methods
Prusa MK3 3D printer, Prusament PLA filament, 215°C printing temperature, 0.2mm layer height, 100% infill, 5-6 perimeters (walls), M3 steel screw nuts, M3 injection molding interts (M3 x L3mm), M3 3D printing inserts (M3 x L5mm x D4.22), TS100 soldering iron set to 200°C.
Support my work:
www.mytechfun.com/donation
Patreon:
/ mytechfun
Mentioned video in introduction, by CNC kitchen:
• Threaded Inserts for 3... 
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Hello Igor, i really enjoy your content as an german engineer. These Tests are very helpfull for the design of my 3d printed parts! They are a good addition to the videos of "cnc kitchen"
Stefan, is it you from CNCkitchen? xD
Stefan? Must be very common German name. I think CNC Kitchen author is also Stefan. I am glad you like my content. Regards from Hungarian Engineer :-)
@@MyTechFun Hahaha! yes, It is very common.
Yours and his videos are really helping stop the "guessing game" and start designing based on reliable tests, like we know from metall.
Maybe some day Fusion will be able to slice, produce infill and calculate the stress..maybe with topology-optimazation... but i guess they will put that in some expensive modules.
Anyhow.. looking forewart to your next video!
@@certified-forklifter No, its not him.. but i am from germany too. ;)
@@stefans.8027 haha, okay :D wäre nur gerade so ein bisschen lustig gewesen. undercover Stefan xD schönes Wochenende
Thank you for running these tests and sharing your data!
This helps me understand those forces in very tangible way. Thanks!
Wow!
This is absolutely amazing that those nuts even hold something! Thanks a lot for sharing!
Such good info, I would not have tested this on my own, thank you!
To insert these, I like to put a matching threaded rod in the drill press, screw the nut on, heat it with a blowtorch, and then press it in. Keeps it nice and straight. For inserts with a closed bottom, remember to make an air hole so the trapped air can escape!
Good idea
woah! amazing tests dude! great information :)
I loved the intro, great stuff man.
For range :-).
Just like always, well done.
Thank you for your efforts,
God Bless You!
Very informative and useful. Thanks for all the details!
I love all the testing! Great source of knowledge! Thanks for the great content
This is what I looking for!
Thank you, you helped my Thesis
Excellent tests. Thank you very much
Brilliant, love how you use your body weight to show force required. ❤
I don't know I will use this information in someday, but this is great video. Thanks!
interesting and useful tests. Thank you
Very interesting video and results. Thanks!
Thumbs up and I had to Sub from what I seen on your videos the time and research you put into your work is impressive, I also appreciate that you share the knowledge. Great video may you always enjoy 3D printing.
Great review/Test
Like the load objekt :-)
Thanks for sharing :-)
Well done, keep up the great content
Impressive tests 👍🏻
Great test sir!
Vary awesome man just the answer I was looking for thanks!
Great test. Thanks for sharing.
Great test. Thanks!
thats insane!!! awesome vid!
Another great video, thanks.
great video, thank you for your content!
This was awesome. Safety is number 1 priority tough. Be careful.
Did not thought that the third type would be that strong.
I was surprised too. But 2nd may be almost good as 3rd version, if it would be same size. Maybe only 40% weaker.
very useful information thanks👍👍
Super me ayudó mucho tu video, realmente valió la pena, saludos
Thanks, good stuff.
Thanks. Seems I can use the nut in things like fan shrouds where I don't need a lot of strength but maybe have to thread in multiple times for service of the fans,etc.
I will continue to use the brass 3d printing inserts when I need a high strength part.
Интересное и поучительное видео , спасибо
It helped me today
i love this test setup haha
I’ve been using the injection moulding inserts but after watching this I think I’m going to have to order some of the proper 3d printing inserts
Excelente! Gracias por compartir!
Thank you. A GREAT test. Very useful. Hope you are AOK :-)
Awesome video.
Good work
Hello, very good video! I also suggest comparative torsion tests ...
Nice video 🖖 👍
That would have been interesting to compare the max torque of the three types of inserts
Great analysis! One thought/suggestion- consider adding grooves parallel to the standard nut's surface (perpendicular to the threads) to see if thes grooves would increase the holding strength.
But otherwise this will really help me decide on which nut-serts to purchase! Thank you!
Really awesome ' imagine used the print part with nylon cf 10%
Surprising!
Another con with the hex nut is that you always have extra work with them in cad. And actually in real life cases when they fail is not because they carry that much weight, but when they work as a sandwich, the middle material holds up, and when you tightening the parts together the nut will pulling out by the screw before you can even tighten them. Maybe the strength could be improveb by cutting/grinding some grooves imto them, but then its really just not worth that extra mmount off hassle.
Hey Igor, interresting Tests! Little tip: use the same scaling for your diagrams. It's easier to compare with each other ;)
Yes, I noticed that when I uploaded the video. But at least the average values has same scale. Probably I will do a torque test in near future with several sizes. Only it takes few months for items to arrive from China..
@@MyTechFun Easy enough for anyone to remap your values into a spreadsheet! Personally speaking, when the scales differ so much, I find your method much easier. The maxima and differences can easily be seen to compare across they types just by looking at the scales anyway.
Thanks Igor for the recommended insert space dimensions at 6:57, it's very helpful. Note, the idea is to insert the Hex nut at the top end of the 3d printed part (not the bottom end as in your test), then its load capacity is ±30% greater than the last threaded insert you tested.
lol awesome stuff thank you
Method #2 is way more accurate since hanging on it makes sure the force vector is aligned with gravity
First of all, I thank you for making an extremely useful video! I hope your butt is fine. 09:46 😂😂
I wonder if using smaller sized hexagonal standoffs (ones that look like a nut, but one end is like a screw for continuation) would be better?
The idea would be that "hopefully" the scrend end of the standoff would be melting together with the plastic and thus make it not fall out and the hexagonal part would still work for torque.
Likely not so big of a financial gain, but for times when you have standoffs laying arount I wonder if they can be used.
The third type of insert nut is called a *Double Twill* insert nut
Thx, I really like these useful comments (too)! I couldn't find that info befre video.
You should get/make a block and tackle or pulley set up for these tests. You'd be able to test to much higher forces without hurting yourself. Great work though! Very useful info
Working on safer solution, I need another rod to attach second pulley.
Idea for a next video maybe: Have you considered inserting a screw in a design? Or maybe just a thread?
Nice video. Tell me, even though you're outdoors how are you cancelling that wind noise. What mic are you using and what sort of software are you using to process the audio?
Sony ECMCS3 with sponge on it, attached to zoom h1. Audio+video combined in Davinci Resolve free video editor.
Why not use a litle preprocessing on the nut? Like mount it on a drill/lathe and make a groove around. IIt should improve the strength making it similar to the injection molding part (or even better.
Hi great video... what soldering iron do you use and where do you get it?
just seen it in the description
Well done, putting your body under fire for data
How would you remove a molded insert like those? I have a project that has a insert that is stripped.
Looking at your test how come you chose to use the heated nuts on the same surface that a bolt head would also be on? Would there not be tremendous amounts more of holding power by simply having the nut on the other side of the plastic test piece. When I use these I never design my part to use a nut like how you have used them in your test.
Hello! For the hex nut, the adjustable soldering iron that I can find has 200C as minimum temperature and not 180 as you conduct your test, will that be fine for PLA?
Should work with 200C too, just follow when to remove the soldering iron.
That is a cool soldering iron, where did you get that?
Ts100, from AliExpress
Great video 👍 i also recommend checking CNC Kitchen channel cause he had some good videos about the inserts too.
100+ kilos from such a tiny thread. That's insane.
Hi Igor, can you please share the link to your soldering station with digital temperature adjustment on the wand ? I’d like to purchase one as well.
It is TS-100
Hello, you should use a winch or something like that to apply force, it would be much easier but maybe less entertaining ;)
But I do this only for entertaining.. /joke/. I am working on better and safer (and more boring) solution, only I coudn't wait for these results, I was very curious.
Wonderful trick, except for PETG which doesn't respond to heat the same way as PLA and ABS. Maybe it's my blend?
Nice video. Is there any chance that you could do a test where you are pulling through the part to take advantage of the increased area of the hex nut? Also, a torque test for the same reason?
Yes, in near future, but first I have to prepare some stronfer measuring equipment, because my weight is not enough for that pulling test. But this would depend a lot from type and strength of plastic material.
@@MyTechFun if I may, I would think a cheap and easy way to do this would be a hand winch and a few pulleys.
@@Jazz3006 Yes, only I need something on the oposite side, where to attach a pulley. But it will be done soon anyway.
Insert a Hex nut in 3d print then put top cover with a hole the size of nut hole size. Two parts.
Interesting solution, but depend of the design, sometimes thats not possible.
Or just insert it deeper, plastic will reflow over the top and make it significantly stronger.
is it necessary to have 100% infill for the hex nut?
No, but at least 3 walls.
can’t you just insert the nut while printing and print over it? it worked with magnets for me so inserting nuts will be even easier?
I don't understand why we wouldn't put the insert in from the opposite side of where the force would be applied, making a shoulder for the insert...
Depend of the design. Sometimes you need object to hold this pulling force or in both directions.
I wonder what would happen if you score a diagonal in the centre of each face of the hex nut which creates a llittle valley for the molten plastic to collect in . I can send you a jpg if you wish
With what tool you would score that diagonal? I guess you mean the line scored into the nut would be parallel with the nuts top-bottom faces and go along the nuts faces "circularily".
But I wonder that the nut is metal so if there are simple tools that can make that little valley into the metal at home simply?
@@u9vata I think I would use a mini grinder wheel disc 30mm attached to a drill. Grind a line into the hex nuts sides ( x6) so that when it is pushed in to the plastic there is a valley that the plastic melts into these valleys and ends up a smaller diameter than the outer hex edges. Similar to the score marks on the sides of the other nickle threads you tried.
@@das250250 I was thinking more in lines of: get a thin wire, a hammer and something that holds the nut in place...
I could make scars on a nut I tried now on its surface face, but harder when I want to score its side. Mostly hard because the nut itself is pretty small.
@@u9vata I am happy to send you my idea in picture via an email or app
i wonder how the nuts would fare if you created basic knurling on the outer surface
Yes, I was thinking about that too, but I wanted to test standard nuts, without modification. Because knurling would be different from case-to-case.
@@MyTechFun it would definitely be a case to case scenario as the angle of the force would change the engagement of the knurling i just felt it might be a good test as the threaded inserts had protrusions to prevent pullout
the turning force should be fine though
"Pull out load" lol... I'll grow up someday.
4:15 name of this tool?
I'm pretty sure thats a TS100 Portable Soldering Iron
@@TheGamerFreak007 Thanks a lot dude :D
@@Peppins You're welcome :)
108kg
hahah all for science
see what happens when u stop working out
Yeah, but that happens to all swimmers, even if they are still active as masters ;-) ruclips.net/video/4NPm_v_p1iQ/видео.html
To much talking before anything happens.
Did you use the same depth for all?