These fidget centers the latest fad
we've seen a few 3d printed ones but
they tend to explode if you go over
50,000 rpm! Now as you might know we just
got a 3d printer which is actually the
only 3d printer in the world which can
print carbon fiber inside of the part!
It's called the mark 2 by MarkForged and
with the click of a button you can print a
super-strong composite part, so let's build
the world's best 3d printed fidget spinner!
Now on the Hacksmith channel we tend to
only have two kinds of projects: Marvel
projects and Batman themed
projects, so let's make a Batarang spinner!
Using SolidWorks let's design the
spinner. Now the most important part of
the fidgets spinner is making sure that
it's perfectly balanced, for standard
shapes it's pretty easy to do you put
the bearing in the center of the part
but since this is a Batarang it's not
perfectly symmetrical! Luckily using
SolidWorks I can calculate the center of
mass with a click of a button now we can
place the bearing and its exact center
now that the model is done we can send it
to our printer to print! The Eiger
software allows us to choose the carbon
fiber reinforcement we want in the part
so we're just going to put a fiber ring
around the perimeter of the part which
should prevent it from exploding!
Alright so we've got the part printed
now and we're using a standard 608 style
bearing but this is actually a ceramic
bearing these are designed for ultra
high speed applications
now we've designed it to be press fit so
we actually use this milling vise to
push it into the part so it's nice and
snug now normally when installing press-fit
components you want to use an arbor
press unfortunately we don't have one so
we're going to make do using a vice
instead alright now that we have the
bearing pressed in let's install the
finger guides alright so this seems to
work pretty good but we're going to
speed it up even faster using air
pressure now we're hoping to get about a
hundred thousand rpm out of this which
would be pretty dangerous to hold on to
so we're actually going to clamp it at
the table and put up some safety
guarding so we don't get impaled by
plastic in case it explodes!
alright that was pretty fast but I think
we make it go faster let's turn up the
air pressure needs a smaller nozzle a
smaller nozzle will allow the air to
come out at a higher velocity and
hopefully result in a higher rotation
speed for the spinner... WHOA!
we maxed out the sensor now let's see
what happens with the dropping orbee on
the spinner that was pretty cool but
what about a handful of Orbeez?
all right so we have some more Orbeez
and I will dump them all on it.
alright that was awesome we got this
thing going over a hundred thousand rpm
and I really think the embedded carbon
fiber stopped it from exploding because
other 3d printed spinners have exploded
one spun up with an air compressor
anyways we're actually doing a giveaway
so you can actually win this very
spinner and it's super easy to enter all
you have to do is go to gawkbox.com/thehacksmith
and sign up for an account
download some free games
to play and you can actually tip the
channel by playing these games! On May
31st at 11:59 p.m. Eastern Standard Time
we're going to be taking the top three
people on the leaderboards and sending
them one of these spinners so more
information on what Gawkbox is check out
that video there, thanks again for
watching and good luck!