Threaded Inserts for 3D Prints - Cheap VS Expensive 💰

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4 жыл бұрын

Buy our own CNC Kitchen inserts at cnckitchen.store/ or at resellers www.cnckitchen.com/reseller and on AMAZON (EU) geni.us/s8rYtQ
I tested different types of threaded inserts for their strength and usability to find out if it's worth spending more money on special "3D printing" inserts. Since the last video really performed well I made another video on that topic in order to answer some questions and comments. This test covers M3 inserts and tests them in PLA and ASA.
Also find the results on my blog: www.cnckitchen.com/blog/threa...
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Пікірлер: 1 100

@CNCKitchen 4 жыл бұрын

Don't forget to share this video on Facebook, Reddit, Twitter and other social media!

@Deqster 4 жыл бұрын

Impressive analysis committee and methodology as usual Stefan!

@quatre1559 4 жыл бұрын

On your torque out test, the reason for failure of the bolt head is because you are torquing againts the insert itself, you could try using a longer bolt and thread lock it into the insert and use a washer to provide lateral support for the fastener head and shank.

@cthulpiss 4 жыл бұрын

In my practice most (if not all) of the insert are being pulled out from the opposite end - so "pull-out force" is not important, as printed parts (elements of HEVo) are starting to crackle ominously when screwing then hard :) Also - by inserting M3 bolt from the opposite end while heating insert with soldering iron helps A LOT with keeping them straight. And I used only cheap ones so far.

@the1stbuilder65 4 жыл бұрын

Just a heads up, your M3 aliexpress affiliate link is broken.

@Bednar121 4 жыл бұрын

There is a problem with the audio in the video, around 1:05 it cuts Your voice and then returns to normal after a second Great video anyway :D

@billbyrd9845 4 жыл бұрын

For me... your channel is the most important one for 3D printing. I say that because you address structural (as opposed to aesthetic) issues, and... you do it in a way that the layman can understand. There are other very technical 3D print channels, but they are useless to me. Their viewers would need to be advanced printers to know what they were even talking about. Thank you for the great work.

@ster9765 4 жыл бұрын

Agreed. I'm not a novice and this channel still has the best content. Some of the other popular ones all eventually devolve into "politics" of the 3D printing world - things I have zero interest in.

@mudawott 3 жыл бұрын

CNC Kitchen is the best resource channel for 3D printing. A lot of it applies for any printer on the market. I like makers muse is great for fun things to try. Or cool test prints. Bur cnc kitchen is legendary for data being pressnted in an interesting way

@The_Forge_Master 3 жыл бұрын

If you ever find yourself looking for thorough testing on household items rather than 3D printers, I highly suggest Project Farm. He tests just about everything. Tape, oil, ratchet straps, batteries, drain cleaner, tire sealants, portable tire pumps, nut removers, brush blades, windshield wipers, drywall anchors, the list goes on. Some tests are less scientific than others (the brush blades come to mind, lots of room for human error), but they're more than sufficient for how people actually use them. Plus he never accepts sponsorships.

@etch3130 2 жыл бұрын

@@The_Forge_Master however he has the personality of a small pencil.

@andrewmorgan7770 2 жыл бұрын

Agreed. CNC kitchen will turn you into an advanced printer and you won’t even notice it.

@andrew-wyer 4 жыл бұрын

Those "cheap" inserts appear to be overmolding inserts, designed to be held in place and have plastic flow around them. When you heat press those, I'm guessing a cavity is formed where the plastic did not flow and create the ledge necessary to mechanically lock into the plastic.

@cegan09 4 жыл бұрын

this is 100% what is going on. Those are meant to be in place at the time of molding, not added after the fact. That's why they don't have the lead in chamfer and they push plastic when you try to melt them in. They are not designed for this application, though they will work ok for light loads. When used in their intended application they are equally or more strong than the actual heat set inserts.

@vadimtrochinsky2078 4 жыл бұрын

Perhaps it would be worthwhile to experiment with holding the soldering iron for longer to see if melting the plastic more helps with that issue.

@KWang_12 4 жыл бұрын

agree

@jexom 4 жыл бұрын

I just print the hole smaller than it should be and hold the iron for a bit longer. The only time such a part broke wasn't even in the place of the insert despite it being the place with the most stress applied

@boblewis5558 4 жыл бұрын

Was hoping you would try a pull through test as well as a pull out since that would provide the greatest strength for them all. I.E. insert the insert on one side but screw the bolt into the other. Also, I wonder how well M3 wood inserts would work (if at all) i.ebayimg.com/images/g/2koAAOSwDoNd1PUd/s-l400.jpg

@alansmith2197 3 жыл бұрын

As an ex aircraft engineer, I've always fitted inserts from the back side for a superior fixing.

@TheVideoVolcano 3 жыл бұрын

thank you for sharing you experienced tips :)

@katura. 2 жыл бұрын

If that is a possibility, but if it is it will greatly improve performance. I would like to test out if it would be possible to insert them during the print with a pre programmed pause in the g-code for parts where that wouldn't be a possibility, though I think I'll run into problems with the bed level.

@Dandydorf 2 жыл бұрын

You mean so the thread goes from the other side through the plastic?

@benlawton5420 2 жыл бұрын

@@Dandydorf I think he means he'll insert it from the back side so the force on the end product will try to pull it further in.

@Thor_Asgard_ Жыл бұрын

not always possible but good when it is.

@elgullitch 4 жыл бұрын

Whenever possible, threaded inserts should be installed on the side of the part opposite from where the fastener is entering it. (Obviously this isn't possible with blind holes) This preferred orientation results in the fastener pulling the insert even more securely into the part. It would be interesting to repeat your pullout tests with your test blocks flipped over. I've found that the plastic part will usually fail catastrophically before the insert is pulled out.

@darrinbrunner6429 4 жыл бұрын

Thank you again. You're the only one who provides reliable, real-world data for this sort of thing, and it helps me when I design my projects.

@joeldriver381 4 жыл бұрын

Yeah- what Darrin said!

@sabeledger67 4 жыл бұрын

Now i wish I've seen this video 2 weeks ago, just had a project, where this would have been the perfect method...

@komitadjie 2 жыл бұрын

I would think your major advantage to a threaded insert, particularly when you might choose the cheap ones instead of threading directly into plastic, would be for something that doesn't require great strength, but *does* require repeatedly removing and re-installing the fastener. In those conditions, cross-threading and wear would quickly destroy the threads in plastic alone, where the brass insert would happily withstand as many cycles as you'd wish to throw at it without appreciable wear.

@olegvelichko1659 4 жыл бұрын

Surprised that the direct “screw into plastic” method was so effective at pull out resistance. Performed just as expected on the torque-our test. Didn’t think it was going to be any good at that.

@microdesigns2000 4 жыл бұрын

I did this with a bunch of M6 screws. I heated a screw with a small heat gun, and threaded the screw in to the PLA to form the threads. After the holes cooled, I stripped a couple of the holes by tightening the too much. The M6 threads are pretty deep, about the same as the wall thickness of the PLA. If I figured out how to create thicker walls around the holes than the rest of the model it would have been better. This video is great because I've wondered about which inserts would work best. Now, I wonder if the results would be the same with bigger screws.

@Tasarran 4 жыл бұрын

@@microdesigns2000 Generally speaking, the bigger you go, the easier the pull-out will be, but the harder the torque-out will be.

@PowerScissor Жыл бұрын

I always just tap right into PLA with a tap set and never had an issue where those threads were the weak point. I bought hundreds of brass inserts to use when the tapped threads fail...but they have yet to fail!

@davewilliams6172 4 жыл бұрын

Was just thinking about fitting them into a pocket from the back, The back hole should be sized for the insert but the front sized to just clear the thread thus leaving a shoulder for the insert to pull up to. Love the testing machine by the way

@g.j.647 4 жыл бұрын

I'm using your suggested method whenever possible and it works very well even with the cheapest inserts.

@newolde1 3 жыл бұрын

Another potential depending on the design is to make a slot for a regular or square nut to insert them from the side. This essentially embeds the nut in the middle so it is as strong as your piece on pullout. The only issue that I've run into with this (mainly with regular hex nuts, less so with square nuts) is torquing, as the nut may spin through the plastic when tightened as it's only held by 4 sides. I've solved this by simply filling the slot by melting filament which securely locks the other sides of the nut in. Again this is definitely design dependent, requiring the ability to create a slot in the side of the piece to slide the nut in sideways, but it is definitely the strongest when it comes to pull load as the nut is fully embedded in the piece.

@shelbyseelbach9568 2 жыл бұрын

Absolutely.

@tralfazy 2 жыл бұрын

@@newolde1 CNC Kitchen did some testing with steel nuts. Putting the nut in a bottom pocket gave over twice the pull-out strength over the side-pocket method! (165kg vs 85kg) Even threading a bolt directly into the plastic was stronger than side-pocket at 118kg! Helicoils and inserts were barely better than direct threading the bolt into the plastic at 120kg vs 118kg so inserts are a waste of time it appears. (maybe useful if inserted differently as some suggested here) There are some surprising results: kzfaq.info/get/bejne/aN2ClpR8x6ulhWw.html

@peterteal880 4 жыл бұрын

Thanks for making this series of videos. I, and probably many other people, find this information invaluable. I’ve always wondered if it was worth buying the more expensive, chamfered, inserts. Your videos are always quick, to the point, and well edited. Well done!

@atomicsmith 4 жыл бұрын

I don't even have a 3D printer, but I think it's amazing that you did this test!

@Daekar3 4 жыл бұрын

Stefan, I really appreciate all the testing you do. When I have questions about what I can get away with when designing for AM, you are my first source. Thank you so much!

@SuperMakeSomething 4 жыл бұрын

I recognize those stickers at 6:56! Thank you for the feature Stefan! Also great video on threaded inserts!

@joeemenaker 4 жыл бұрын

Fantastic tests. I think what this tells me is that just driving the screws directly into the plastic is fine, unless you plan to repeatedly remove the screw and replace it.

@Arek_R. 4 жыл бұрын

Once I was able to snap M3 A2 stainless steel bolt when screwing it into bare PLA part with 100% infill and thread lenght 10mm which was created by first drilling recommended size of hole for tapping and then tapped it with the bolt itself. Cheap injection molding inserts, completly useless, come out easily, get blocked at the end - so same results as you had. More proper press-fit type inserts("eBay" ones) work well for me, but I don't use heat like you do, I drill smallest recommended hole for this insert, then press it cold, requires quite a bit of force, at least 50kg, but then stays in quite well. Those special inserts "specially designed for PLA" yeah you're correct, those are inserts for standard plastic, didn't use them tho. And yes I do drill holes in filament, it's stronger as you have solid wall instead of textured wall, it's too much of a pain in the ass to try to print exact hole size, depends on too many factors, too hard to control it, just design 3mm hole, it will print as 3.2mm then you just correct it with 3mm drill.

@patrickweckermann9121 4 жыл бұрын

I think you nailed it in this one. As tempting as it is to go with the cheap inserts for low strength applications, the amount of time and effort of keeping them aligned is a deal breaker for me, especially if i was trying to do a small production run of parts.

@outsider344 4 жыл бұрын

For such a technical hobby the 3d printing community really does have a lot of folk wisdom floating around that is pretty much baseless. Its really nice to have these videos to provide some real information.

@ArnaudMEURET 4 жыл бұрын

So true. DIY 3D printing is the poster child of Cargo Cult.

@outsider344 4 жыл бұрын

@@ArnaudMEURET When I got my first roll of PETG I spent the longest time taking pains to 3d print everything as one part because I had seen loads of people say it was near impossible to glue it. But one day when I was out a family member accidentally broke one of my prints and glued it back together. Turns out super glue works fine on PETG. I learned a lesson about 3d printing common knowledge that day.

@FreeOfFantasy 4 жыл бұрын

@@outsider344 It kind of depends. ABS you can just partially dissolve with acetone and get perfect properties in the joint, as if it had been one piece (disregarding internal structure from infill). Super glue works well if you just want a stiff joint. If you are however using the flexibility of PETG properly gluing it is hard.

@outsider344 4 жыл бұрын

@@FreeOfFantasy I agree. But I had seen people saying you just can't glue petg at all. That they avoid printing it because the only way to join pieces is with mechanical fasteners. You do make some compromises with the material properties at the joint when you use superglue but that beats the heck out of having to screw parts together.

@DreamingBearcat 4 жыл бұрын

I've been using some I got from Adafruit and have found that, as I iterate, I waste a lot. Thankfully, I've found that you can actually reuse them if you screw a screw in all the way, blast it with a heatgun, and pull. Ruins the part, but if it's a failure anyway who cares? Just thought I'd share in case it helps anyone.

@CNCKitchen 4 жыл бұрын

Good idea!

@AlexAnd3885 4 жыл бұрын

This is actually where the cheap injection molding inserts excel - they are so easy to pull out that you can reuse them again and again... -.-

@tinayoga8844 4 жыл бұрын

Sometimes we don't need a lot of holding strength but instead need the ability to insert and remove the screws a number of times without damage to the plastic. In this case the cheap inserts could be more than sufficient.

@TheMidnightSmith 4 жыл бұрын

Did you watch the entire video?

@EdyStauch 4 жыл бұрын

@@TheMidnightSmith if you don't need a lot of holding strength the cheap ones are good enough. Now that i know that cheap ones holds up to 30KG i surely going use then for hold up to 15KG...

@KiR_3d 4 жыл бұрын

if it has no chamfer then it's a pain in ass to work with!

@LopezfsS 4 жыл бұрын

@@KiR_3d you can maybe remedy this by adding a slight counter sink to your design.

@KiR_3d 4 жыл бұрын

@@LopezfsS Sure, but it can be hard to implement if you have thin walls (actual walls) for example. Then on one end it will have almost no grip.

@TheRealStructurer 2 жыл бұрын

Another great video from the kitchen 👍🏻 I am impressed how much detail you put into them and how much that helps us! Keep them coming!

@ethanadams598 4 жыл бұрын

I'm new to 3D printing. I've been watching your videos to get some tips and tricks to improve my skills. I don't normally comment on KZfaq videos but I would like to say your videos have helped me tremendously in improving my skills. Thank you for the time and effort you put into your videos to help all of us. Keep up the good work.

@mnp2169 4 жыл бұрын

I would be interested to see how this compares to having inset hex nuts instead. I tend to use nuts to fasten my prints together (similar to the construction of a Prusa) for ease of use since it doesn't require a soldering iron. I could be persuaded to switch if threaded inserts were significantly stronger though. I suppose this largely depends on the amount of infill used.

@ionstorm66 4 жыл бұрын

My guess is the nut will have a higher pullout, but would have lower torque out because it crushes the part. The threaded inserts are touching the bolt head when they failed in torque out.

@Etna. 4 жыл бұрын

Hi there! I worked in the recycling industry for years and when we started to use 3d printed parts for our valve systems, we quickly banned all inserts. They just won't hold and become loose due to vibration. You can't loctite them and no other glue seems to work either. The solution was using square nuts in channels. They are not only cheaper but can also handle higher torques than inserts or hex nuts. I hope that helps! Regards, Etna.

@ElizabethGreene 4 жыл бұрын

Inset hex nuts are my favorite too, either installed after the fact in a slot or captive in the part by installing them during printing by pausing after the last layer before the hole is closed up.

@FreeOfFantasy 4 жыл бұрын

There is also the question of square and hex nuts. I would guess that square work better in this application.

@ccricers 4 жыл бұрын

I haven't gotten around to using threaded inserts yet, mainly because I'm too lazy to go buy a new soldering iron lol but somehow preferred to buy hexagonal female standoffs. I use them in the same fashion as inset hex nuts, using friction fit to hold them in place and put in a screw from the opposite side so they stay put.

@fredgenius 4 жыл бұрын

I fit them from the back of the part where possible, then they perform much better!

@runklestiltskin_2407 4 жыл бұрын

That's a great idea! You can even make so that the hole has a smaller diameter on the end. Awesome, thanks!

@fredgenius 4 жыл бұрын

@@runklestiltskin_2407 You can also make insert hole with alternate layers smaller/larger, and glue the insert in with epoxy...

@timha4102 4 жыл бұрын

Same here. I fit them in through the backside and then pull them in ffom the front with a screw. So you don‘t need the space for the soldering iron.

@fredgenius 4 жыл бұрын

@@timha4102 Yes, I use this trick to help get the insert square, so the screw is perpendicular to the surface. I use a long stainless screw so I don't burn my fingers, and easier to judge the correct angle.

@dasquiddi 4 жыл бұрын

thats also an idea that i thought About an had liked to see as a test

@NJKirchner 8 ай бұрын

Thank you so much for these great guides. Over the past few years as I've done 3D printing your experiments and wisdom have really helped to smooth out the process for me. I know that making such videos and experiments are a challenge and can be not as fruitful as you might need them to be to pay the bills, but hopefully the small consolation of being a true and wonderful virtual mentor can temper the struggle. Thank you Stephan 🎉

@olympusneo Ай бұрын

As I was searching for threaded inserts for hardwood, your website kept showing up. I follow your channel so I'm delighted to see that SEO for your website is really good.

@maxximumb 4 жыл бұрын

One thing to consider with the cheap inserts, well all inserts, with 4 inserts working together, like the fan mount, the cheap inserts would give you up to 156kg before they started to fail.

@DanielDroegeShow 2 жыл бұрын

You should never rely on multiple fasteners to do the job unless one is strong enough by itself. The rest are just for support but all of the load will only be applied to one and not spread evenly.

@pablopicaro7649 4 жыл бұрын

would like to see test of Screws that are specifically made to fasten into plastic, and that self tap the hole. Like those found on many consumer electronics.

@chemistrykrang8065 3 жыл бұрын

They'd be pretty good for pull-out (dependent on length, obviously) and fairly lousy for torque. The holes also deteriorate quickly if you take the screws in and out. I actually watched this video whilst buying threaded inserts (and stainless M4 pins) to replace the self tapping screws that hold on my car's pollen filter housing and can no longer be properly tightened. If you will need to remove and refit the screws then self tappers aren't a good choice in any material.

@Gh05tk3y Жыл бұрын

You and teaching tech are my best resources as I get into this hobby. Thank you for all you do.

@euroriderdk 4 жыл бұрын

Stefan, I totally love your very professional approach to all the project you make. Maybe one if not the most serious 3D printing channel out there. Please keep up the good work. I keep watching your video, even if I dont need it, just to see the level of high quality :) Five stars from me *****

@BasedBidoof 4 жыл бұрын

aww hell yeah. I was hoping you'd do a video on this. You do such great breakdowns.

@antalz 4 жыл бұрын

Great video once again. I would have loved to see the embedded-regular-nut technique too, that's my go-to technique. I would suspect it had very high pullout strength, but relatively poor torque-out strength, especially for small nuts.

@TheLinuxBust 4 жыл бұрын

Those animated graphs next to the pull test are really nice!

@jeffpoulsen435 4 жыл бұрын

Danke Stefan! I don't have the time to do tests like this with this much fine detail. I'm letting my work colleagues now about your channel. Please keep going.

@PauMallol 4 жыл бұрын

Would be interesting to see case variation with screw directly to plastic, reasonably tightened, and performing the pull out test after some time: from my experience screwing directly to plastic suffers often from creep or material relaxation over time thus might not be a long term reliable solution. Otherwise it was a great video, as usual! Cheers!

@iliya-malecki 4 жыл бұрын

i model threads in the part in fusion360, with a little bit of chamfer on top, and directly screw in the plastic. In my experience, with 4 perimeters of 0.4 nozzle this is a rather durable connection, even after a half a year of screwing in and out 1-2 times a week threads hold properly, i just make sure not to overtighten them. So, id be glad if you tested torque and pull-out force that this connection can withstand with differing amount of wear on it - perhaps, strength after 0 cycles, 10 cycles, 50 or even more

@satibel 4 жыл бұрын

Also self-tapping and regular screws with no thread would be interesting.

@bleach_drink_me 2 жыл бұрын

Thanks for the testing. I need some inserts for a project. Came here because I watched this video abouy a year ago and remembered you tested them. Here for a refresh on which are best.

@MrCharkteeth 4 жыл бұрын

You do such amazing work, and you showcase everything so well in your videos! You are awesome! Thank you! :D

@thinfourth 4 жыл бұрын

For the next video How well do embedding an ordinary nut compare

@fredgenius 4 жыл бұрын

Good question. From experience, captive nuts perform better (when used on the reverse side of the part, or even embedded inside the part), simply because they have a larger surface area to engage with the plastic.

@RentableSocks 4 жыл бұрын

@@fredgenius captured hex vs captured square nuts!

@Coloneljesus 4 жыл бұрын

They can be fiddly as hell, though.

@Anyone700 4 жыл бұрын

@@fredgenius Your claim does not make sense with respect to the empirical data given. If you had the hot melt insert on the back side of the print, the plastic would again be the weak link. Look at what the inserts did in the last video when he had infill. The inserts were strong enough to blow apart the plastic well beyond their diameter. Having more surface area is a moot point when the weakest point is the surrounding infill.

@fredgenius 4 жыл бұрын

@@Anyone700 As I said, it is my experience. Much depends on the material, and structure of the print, I suggest you try for yourself and form your own conclusions.

@jefbed212 4 жыл бұрын

Wonderful video. I usually use the under-sized hole method. I've also had success with regular M3 nuts thermally set into one side of the part. The measurements of having a nut thermally set in a hexagon pocket in the opposite end of the part would be interesting. This is cheaper than the Chinese brass injection molding inserts, and likely provides greater strength, due to the exposed diameter of the nut being supported by almost the entire thickness of the plastic.

@licensetodrive9930 4 жыл бұрын

I've been using M2 & M3 bolts to hold printed pieces together that can't be printed in one go and don't need separating, but I will be watching this video with interest as it's always good to know new engineering techniques. Thank you.

@BeeWhere 4 жыл бұрын

Great job, this is super interesting and I appreciate the time and energy. Keep up the good work

@marcozacarias1675 4 жыл бұрын

Outstanding work lad!

@benjamindoerr8831 4 жыл бұрын

Stefan, thanks for the research!

@ChristianWerner 4 жыл бұрын

Very nice review, thank you! I used to rely solely on captive nuts. Seeing your results, I think I'll use inserts with confidence in the future.

@rickrandazzo 4 жыл бұрын

Excellent video. I never even thought of using inserts and you answered every question I had.

@JernD 4 жыл бұрын

I would be curious to see the effect of hole geometry on the pullout strength of the cheap inserts. For instance, you could try having a conical top to facilitate threaded insert alignment. You could combine this with a narrower diameter below the cone to help grab on the smooth ring of the cheap threaded insert.

@SianaGearz 4 жыл бұрын

Unfortunately the insertion path robs you of most of the freedom there. Because the bottom is flared out, the top is flared out; once you insert the bottom, you have displaced the material and it won't really fill the void around the waist of the insert no matter how you designed it originally, i would think, since the plastic is never fully molten.

@quadplay2591 4 жыл бұрын

Me too, I use the cheap inserts and found good results when reducing the printed hole diameter to something like 3.5mm . Yes it causes excess pla to ooze out when inserting but it definitely makes for better pull out strength. I suspect some experiments will show that its possible to make usable inserts with the cheaper type.

@Underp4ntz_Gaming_Channel 4 жыл бұрын

Those "Ruthex" Specially designed for 3d printing are just standard ones and can be bought everywhere and is not made by them lol!

@zphreaky 4 жыл бұрын

Always providing great information and tests! Thanks for all the work!

@TalbotNC 2 жыл бұрын

Very informative along with supportive data. Thanks for your work !

@theheadone 4 жыл бұрын

awesome video once again. I finally supported you on patreon, I'm happy to help support your fantastic videos!

@CNCKitchen 4 жыл бұрын

Thank you very much for the support! Highly appreciated.

@MBrewah04 4 жыл бұрын

McMaster Carr has a huge selection of quality inserts for plastics.

@CNCKitchen 4 жыл бұрын

No McMaster in Germany unfortunately.

@derektran9404 4 жыл бұрын

@@CNCKitchen That sucks, McMaster Carr is such an amazing resource.

@FlexDRG 4 жыл бұрын

I have the cheap Ali inserts. Mostly for items with repeated screwing and unscrewing with little pullout load. I also design a small indented circle that works with the outer diameter of the insert as a position guide. I also modified a soldering tip to have a cylindrical tip that fits into the insert to keep it aligned and stable and improve heating of the insert.

@CraigHollabaugh 4 жыл бұрын

Excellent research, test results and presentation. Video could not be improved, well done. Thanks from Colorado.

@vincentbarkley9121 2 жыл бұрын

I was wondering about the pullout strength of bolts heated to 210 degrees C then screwed directly into PLA. It seems like this would give higher pullout strength because the PLA can flow more fully into the thread form. Another brilliant video Stefan.

@alfredonovoa8124 4 жыл бұрын

In some cases you might put the cheap inserts on the other side of the piece in order to get better performance

@julians.2597 3 жыл бұрын

Damn, these videos are always to the point and address all the points I'm intested in on a certain issue, definitely the best ressources for learning to construct structurally sound 3d printable designs

@NWGR 4 ай бұрын

Thanks for this one! I just came across this while shopping for some heat set inserts for my prints. I ordered a ruthex assortment and their tips as well. Thanks again!

4 жыл бұрын

When I need, I insert square M3/M4 nut into print

@fededevi1985 4 жыл бұрын

SO basically expensive insert perfectly solve a problem that doesn't exist.

@georghartmann6971 4 жыл бұрын

no ... an insert is way better, when using the screw very much. here he tested only first use, not long time use ;)

@freezEware 4 жыл бұрын

@@georghartmann6971 good point Mr. Hartmann, I however always screw directly into plastic (or to a nut behind it). Inserts are just not ever absolutely required, really, so I've never needed them..

@BRUXXUS 4 жыл бұрын

The undersized hole was seriously impressive! Seem like it's worth spending a little more on fancy inserts if you can. Definitely going to keep this video in mind for future projects!

@parrottm76262 4 жыл бұрын

Thanks so much for your continued efforts and resulting tests. Very worthwhile.

@djdottor 4 жыл бұрын

Half an hour ago I looked on Aliexpress to order some M3 Insert Nuts XD

@swc0ll 4 жыл бұрын

Well, contextual content production is definitely better then contextual advertising.

@chloemcholoe3280 4 жыл бұрын

damn that 0.1 difference is great. most printers I see make it 0.5~ smaller. mine used to do 0.3mm i think? i'll check again EDIT: huh mine can do 0.1 too with ease. I was wrong this hole time....

@SianaGearz 4 жыл бұрын

Yeah 0.1-0.2mm is normal. More is usually holy overextrusion batman.

@satibel 4 жыл бұрын

Mine was on point, though I need to put it back together with the new stepper drivers.

@Pantology_Enthusiast 2 жыл бұрын

.... that pun... you are a certain kind of hole. have my upvote.

@737smartin 4 жыл бұрын

Nice work-thoughtfully tested and well explained! 👍

@insanewave_print Жыл бұрын

I am grateful for your work! There are also many 3d printing engineers in Russia and your videos are a very useful tool, especially tests and comparisons. Выражаю благодарность за ваш труд! В России тоже много инженеров, занимающихся 3д печатью, и ваши видео являются очень полезным пособием, в особенности тесты и сравнения.

@smorris12 4 жыл бұрын

The cheapy inserts need plastic to fill the recessed section between the knurls. Good for plastic injection, no good for printing.

@GRBtutorials 4 жыл бұрын

I’m wondering, what if you twist the insert while inserting? Would that be good or bad for the cheap inserts?

@ifell3 4 жыл бұрын

Never got a notification off this one, glad I've just noticed it!! Always have used the eBay ones, but they are quite expensive. You also can reuse them, use the soldering iron to pull them out and let the pla burn off.

@JPToto 2 жыл бұрын

I wish I had consulted this video before ordering inserts. Well done, and thank you for the detailed testing!

@lasivianleandros3558 4 жыл бұрын

I never thread the plastic or use threaded inserts, I put a nut on the backside instead. This is far stronger than any threaded insert.

@cobra4439 4 жыл бұрын

4:47 I have spotted the deathly hallows

@JAYTEEAU 4 жыл бұрын

Excellent coverage Stefan, I will definitely keep this in mind if I need to use inserts. Cheers, JAYTEE

@paulmeynell8866 2 жыл бұрын

This was great, good to see I’m not the only one who wants to test stuff!.

@chloemcholoe3280 4 жыл бұрын

i hated these inserts my whole life. now I found out it was cause I used the wrong kind... I'll start using them more in my designs i guess xD

@MakerTemple 4 жыл бұрын

2:40 - chamfer the hole

@Bishop0178 3 жыл бұрын

my thought exactly

@Promethium666 Жыл бұрын

DANKE!!! This very helpful video has helped me prevent a future headache, I haven't need to use these inserts in any prints yet but your video made me think about the kit i purchased. I had purchased a knurled insert kit and they were the nasty cheap ones more made for injection moulding but falsely sold for 3d printers, they have no chamfer and the knurled part is at the bottom and top so they clog with material and don't sit flush while skidding around on the print. I've returned the item and in exchange purchased a chamfered knurled insert kit, I was going to get the ruthex ones but for £16 for 100 m3 pieces I decided with another brand that is £16 for 240 pieces of m3-m5 inserts that are exactly the same in design appearance with the knurling changing direction and a nice chamfer for seating the insert into your work piece.

@SmithyScotland 4 жыл бұрын

I appreciate the work you put in to these tests.

@CNCKitchen 4 жыл бұрын

Thanks!

@Tgiles13 4 жыл бұрын

“Quality screws” shearing at 3-4nm?! Haha no.

@Tgiles13 4 жыл бұрын

They arent bad but still wouldnt call them quality

@_Piers_ 4 жыл бұрын

Yes, that was very odd.

@bumv2 4 жыл бұрын

M3 screws are not that big. A random screw calculator at www.amesweb.info/Screws/Metric_Bolt_Grades_Strength.aspx gives 2.1 Nm minimum for the best 12.9 grade, so these are quality indeed IMHO.

@cofa4011 3 жыл бұрын

Thanks a lot for these tests dude ! It was very instructive.

@spicemasterii6775 4 жыл бұрын

Sir. Amazing video. These results can be directly used by us therefore saving tons of time and effort. Appreciate your hard work.

@dizzicz 4 жыл бұрын

Excellent as usual. Thank you. You are only guy I'm supporting on Patreon.

@kurtsigouin5199 3 жыл бұрын

Thank you for this very informative comparison, it undoubtedly has save many persons the grief of using cheap inserts.

@CRIZZZLPT Жыл бұрын

really apprechiate your commitment, since i was a pullouttest aswell at one point

@davebarkerdesign 4 жыл бұрын

Great info Stefan.Nice work as this will help me determine when to use a more expensive insert.

@monty5066 2 жыл бұрын

Another great test. Nicely presented.

@HowIDoIt 4 жыл бұрын

Very cool Stephan! really good info on the strength of the threadserts

@MrBroGrow420 Жыл бұрын

great video, was curious of the process, I was prototyping a handle cover for something with some PLA and with just set screws the plastic of course ended up cracking away at the layers when you over torqued it as you'd assume, so also got these heat inserts to use with the set screws and I got the same style of the amazon ones you showed in this video, and they work much better. Very informative video, great content.

@AthanCondax 4 жыл бұрын

Hey Stefan, I just wanted to thank you for your awesome content.

@Joxman2k 2 жыл бұрын

I hope you know Stefan that you have a great effect on the whole 3D printing community at large. I have seen experts reference your videos many times :)

@carbide1968 4 жыл бұрын

Ty for testing these. This is very useful information.

@davidhutcheson5375 2 жыл бұрын

Really useful vid. Thanks for taking the time to put this together so clearly. Has anything changed in this area since this video was published?

@MrKelaher 4 жыл бұрын

I use chip board screws direct into material, 6 sided holes in the 3d print - the hex holes seem grip really well. I set short axis of hex hole (parallel sides) to inner diameter of the screw (inside thread, measured at top of screw with calipers) Seem to work :) Thanks again for all you hard work.

@legolas0741 3 жыл бұрын

great engineering testing work. good presentation of the results. Liked your video very much.

@flymario8046 4 жыл бұрын

I think all of them are great with the exception of directly screwing into the plastic. That has let me down too many times. Thanks for these tests! I use the M3 cheap ones you showed and am even more happy with them after this video. I will probably be purchasing the ones with the angled tip in the future as they do seem easier to apply perfectly where you want them.

@haenselundgretel654 4 жыл бұрын

Again an extremely well made analysis! Cheers mate!

@diyprojectchannel 4 жыл бұрын

Super Test 👍 Ein wunderbarer Kanal und eine Bereicherung für KZfaq. Danke 😊

@fiveleafcloverfpv4445 4 жыл бұрын

Hi, I use the cheap ones for when needed. More like multiple loosen/tighten threads. Because pla wears out. But I have another approach. I make the hole slightly smaller. Heating up a little and then pull them in with a bold on the other side. Not completely through the hole and a little plastic in front so it's locked up. And before pulling it in a drop of CA glue. Maybe you can test something like this too. Yesterday I saw your epoxy / CA glue video. I also thought CA would improve strength between layers but turns out it doesn't. For expoxy I use Z-poxy but probably much more expensive then HK. Although it less yellow I think. After a while it still colors yellow due sunlight. And try some carbon fiber or glascoat with CA instead of epoxy in your next test. Keep up the good work.

@2112user 3 жыл бұрын

Thank you for the video, honestly only ever used the Injection molding inserts and just figured they were all about the same. One difference between how I use them and how you tested could make for a video idea. When I design holes, I make the octagonal rather than circular..... they seem to be printed more accurately in size, and since they are printed so small, there's little difference in the viewed shape made. Too that, I usually design object to accept the insert in from the rear or the part, the chase the threads with a tap. IDK if it helps with strength, but my thought was that I'm essentially trying to pull the inset through the plastic when tightened, rather than pulling against the direction of insertion.

@iteerrex8166 4 жыл бұрын

Nice test Stefan thanks. Looks like the expansive ones are the ones to get. Not only they perform better, but also locate correctly. If a part has many inserts, accurate positioning becomes very important.

@garrickstokes 3 жыл бұрын

Excellent video! Thanks a lot 👍 Your work might not be laboratory grade science but you are definitely sending many makers in the right direction! Have a great new year and keep up the good work 😁