I have a very special guest on the other side
of the line hello Everson can you hear me? Sure man what's up? I saw your latest video about
threaded inserts and it really make me curious, what size of the bolt you use there? Oh you're
going to test it? That would be awesome, it's uh, it was an M6 bolt but you have to sand the head
you know. Sure give me a week and I will check if the connection is stronger, see you later,
maybe at the end of the video. Let's do this yeah [Music] hey welcome back, this work is some kind
of extension to video published by Geek Detour where my friend Everon present different methods
how can we insert those threaded inserts to be flat with the surface. If you're not familiar
with the threaded inserts check his video. Maybe just one thing I would like to add, one
of the biggest advantages of these tools is the removability of the bolt, so in case you want
to insert and remove that bolt several times definitely you should avoid those screws which
will cut the thread into plastic or the wood. I will test three different methods: the first
one will be pressing the insert against the desk, the second one will be with Everson's
secret tool: for that I have a secret tool Yes pressing the insert with the bolt
and since they have some conical ending, they will press the insert a little bit deeper
and with this resulting a little bit more melted plastic around it. Maybe this will result a
stronger connection, we will see, and the third one we'll be just pressing down with the soldering
iron to be just slightly below the surface and for this I will not use any special tools, so probably
the repeatibility will not be too good (different depth and similar) but in that case I don't know,
even the standard deviation may be considered as a result to. Before you jump forward into video what
do you think which method will be the strongest? I think the difference will be measurable but
not significant, but we will see soon. First I have to prepare my bolt I will use M5 and I'm
using the lathe machine to remove those numbers, specifications for the material. Nice and
flat, and I'm measuring this cylindrical part, very important because I have to create a hole
for it and I know that I have to design a little bit bigger hole because when it will be printed,
it will be a little bit smaller, and the bigger diameter is just for the aligning during the
test. For these test objects I'm using five walls and 50% infill, this is Polymaker PLA Pro in red
color and I will print everything on BambuLab A1 printer. The hole has the perfect size
because that cylindrical part tightly goes in and I prepared all nine test
objects and now it's time to prepare my soldering iron. I have this tip, I made
it from the old bolt quite ugly but it's functional. I'm starting with the first group,
first inserting with the soldering iron, when it is almost completely in, I'm pressing
it against the desk, and then it will completely flat with the surface. And all three objects are
prepared, the next group similar start pressing with the soldering iron but then pressing in
with this bolt. And again all three test objects are prepared, they're marked with number two,
and the third group is just pressing down with the soldering iron slight below the surface.
It would be nice to press in with the bolt, but I will not touch it. The third group
is also prepared and they look very similar to me so I hope the repeatibility will be
quite good. Everything is prepared for the measuring. I started with testing using this M3 eyebolt and as you can see it deformed at
approximately 30..35 kg so not really good for my application. Completely
deformed, so I made a stronger connection. I hope this will be strong
enough. And here you can see me in the action. And what size of the load I have to pull? The average here is 140 kg, let's move to group number two
which was pressed in with the bolt just a little bit bigger load 147 kg average and the third group: press with
the soldering iron below the surface, and it looks like this is the strongest from
these three. And this is how these inserts looks like now after the testing, very similar
in all 9 cases. We can analyze the results to see which method is the strongest, we can
watch the percentage or analyze the graph, but actually for me the real conclusion from
this is that all three methods are very strong. I mean 140 150 kg pulling out load, that's
incredibly strong for M3 bolt. Now we have to clear something: there are two main groups
of the application, with first one that object we want to attach with the bolt will align
to that insert or the surface. In that case, no matter how we tight it, actually the the
pulling out load will be the first failure there. But there are application where we have some gap
between that insert and attached object. In this case, the applied torque may pull out this
insert. The question is how big torque will start pulling out this threaded insert. Now for
your information, with the standard screwdriver we can apply let's say 3.5 Nm torque. I tried the
my torque which I usually use for M3 bolt, it is a little bit below 1 Nm. Officially actually the
1 Nm is the maximum for M3 bolts, 1.3 for some stronger material bolt. But the question is: are
we still in a safe zone OR with this torque we will start pulling out the insert. So let's try to
answer this question. And again I needed some DIY hacks. I was playing a little bit with my lathe
and milling machine, creating these two parts. This distancer is from the brass the new test
objects are printed from the Bambu Lab marble PLA. Dimension of the hole is perfect again I will have two test objects: the first one will
be the verion Pressed Against the desk. Nice and flat. And there will be another one, and this one
will be pressed in with the bolt. You can see, it is deeper a little bit now. I'm using here
this brass distancer. With this I will reduce this torque, but in real application
properly you will use something from steel for example. And in this case actually
this real torque will be a little bit bigger. The maximal torque was 0.8 Nm. Quite disappointing
and this inserts looks very similar to those which I pulled out earlier. This one should be stronger
a little bit because it is pressed in with this bolt and it's a little bit deeper. And now let's
repeat this test and a pull out test. This bolt method was a little bit stronger, let's see if
this will be the case here. The torque 0.9 Nm, so slightly stronger, but I'm still not
too happy with these results. This was an interesting surprise. I thought the torque will be
much bigger. Now this means, that if we don't have any object immediately above the threaded surface,
and there is a chance that it may be pulled out, you have to be very careful how big torque
you will apply to it. If you do have an object above it, in that case, maybe pressing against
the desk would be much better because in that case it will be flatten with the surface and
immediately when you apply some torque to it, it will align to that surface above it. Two more
bonus tests, let's say we print a hole and with the tap tool we cut the thread into it. I'm using
this method very often but only with a bigger threads. 0.3 Nm. And this method I'm using very
often exactly with M3 threads. I printed here 2.8 mm hole and then this bolt will cut the thread
into it. And for the feeling it is stronger. And measuring the torque this will be around 1 Nm,
so for the first thought this is strong. Yes but very important thing to remember! That this, we
can do only once. If we remove the bolt and later we want to reuse it, the threats are partly
damaged, the connection will be very weak. So this method can be used only if you use the bolt
once, without removing. Interesting data. First I was surprised with how big Force we need to pull
out the threaded inserts, but at the other side, how small torque is enough to pull them out. Now
these are one of the smallest M3 threaded inserts I could buy. 5 mm in diameter and the total
length is also 5 mm. There are bigger ones too, and maybe I should upgrade because in some
applications this may be not enough. There are so many tests about threaded inserts on the
YouTube and I hope somebody will do the test with this method, measuring different size
M3 inserts, measuring the torque necessary to pull this out. I'm very curious about this.
I hope I don't have to do it myself. Everson, what's your opinion about the results? Oh
no no no no no no man, you should test it! Everybody love to see you testing. Yeah I am a
little bit disappointed that the strongest one is the ugliest, you know in the top, but I will
continue using the flat one. Your results opened more questions, we we need to talk later yeah
we we'll talk later. Man thank you so much for testing it, great thing. You're welcome.
Thank you for watching and happy printing!
