How to Design Hinge for Tennis Bracelet: Rhino 3D CAD Jewelry Design Tutorial #66 (2019)

How to Design Hinge for Tennis Bracelet: Rhino 3D CAD Jewelry Design Tutorial #66 (2019)

Hello everyone welcome back to PJ Chen Design.
Today we’re going to talk about this tennis bracelet, and how do you
design a proper hinge for the production. Are you ready? Let’s get started! Let’s bring in a stone first. If you
don’t know how to build a stone, I have a tutorial. I will put a link at the
description below, and also on the right top. So let’s build a bezel for it. I’m
going to build as it is for rendering so you’re going to see something like
this. We want to have the edge is really nice and rounded, and we want to have a
puffy and make sure that you cover the culet area, and then we’re gonna have
something coming up like that. and right over here, since this is for
rendering purpose, we are going to have it cut around the stone.
Something look like this, and coming over here. Let’s join everything together, and don’t worry about that
first one may not be really good. You can always turn on the control point, and
then you can kind of edit until you like the result. So we kind of bringing a
little bit following the stone. Now this is our profile. once we have
this profile we need to take a look on what we have here. The stone size that I have
is roughly about 3. something, and this is the wall thickness. It’s
about less than two millimeters. Depends on the design that you have. This
is what I use for the tutorial, but you can always change it to fit
into your production, and the cost. Now we have this profile, what we wanted to do
is using this under the surface. There’s a “revolve” and we want to set it up to
the “0”, and then we want to set it up for 360 degree, and then we’ll get a
bezel like this. Okay, you probably don’t want to cover too much of a bezel it
depends on the design and how much you want to show the stone. All of this about
the stone knowledge can found on my stone setting class
online. I will put the description again on the bottom for you to check it out.
Alright, we have one that here, we need to make sure that what is the
distance that we have in between and then we can design a hinge in between. So
I just make a copy with the Gumball, and we are going to draw a box right
here. The box should cover both of the area something like this, but you don’t
want to over that area, and let’s go ahead to take on the top view now.
Depends on how thick you want it with the opening area, and again this is based
on your design. I’m going to roughly do something like this, and we are going to
move it back to the center by using a line horizontal tool, and let’s type at
0, let’s go ahead to make a copy and paste and hiding one of it, and we are going to
move this out here, and we want to make sure that cut all the way on the bottom.
Let’s go ahead to 1D scale this guy, and snapping into the end point here, and
end point here, and then we will have something like that. Okay
so the first one we’re gonna do very simple “Boolean difference”. This will be
Boolean out of this. Alright, so we have that opening there. The second things we
gonna call back the one that we hided over here, and then we are going to do
the design right here. A few things you want to pay attention here. First,
where is your pin is going to be. I will say you don’t want the pin to be the too
thin 0.6-0.8 mm is fine. So I’m going to set it up
for 0.6 millimeter here, so that will be the pin. What we want to pay
attention is once you have this pin here, you wanna think about how much you
have on both sides of the wall. You definitely don’t want to be wall to be
thin over there. That may break during the production. The
second thing we wanted to do is using the same Center and making another
circle here. What I’m trying to do here is try to see where I should do the
radius for my block. Let’s go ahead to measure this one. On the radius of
this guy is 0.65. Let’s hide this one first.
So I know that we need to fillet edges with this one, 0.65 with
this one. Now everything is there we will need to move the block. Snapping
into the center of this one okay and now look in the top view is already
off-center. Let’s using the align horizontal, type in “0” and back there.
Alright, so let’s turn on what we hide there, and take a look on that. So I’m
going to do a test here, we are going to rotate it, and we are going to rotate
with the center over here, and let’s try to rotate and see if there is anything wrong.
Alright, so we will come over here. Normally you won’t have it bend that
much, but if you do, you see the corner is possible to touch the stone. So
it’s not too good. That means we need to kind of giving a radius on the bottom, or
make it thinner. I would prefer to have a radius. So it’s not cutting our stone.
then I’m gonna come over here, and try to do a fillet like 0.5 over there
with this edge. So that way, it won’t touch the stone
once we rotate it. So now this piece in black is exactly the same width with
this opening. In the scenario like that, once you print out this won’t
able to fit in. So we might need to get a slightly smaller in order to fit in. Okay
that’s one thing, and looking at the gap right there. The second thing is we can
only bend this bracelet in this orientation. It is because the opening. If
you plan to have this orientation, you see it’s blocking what we
wanted to think about is what kind of movement that we wanted to have. If I do
want it to go up and down in this orientation, I might need to have this go
slightly smaller, at the same time the pin that goes through it my need to be a
little bit loose, in order to create that kind of movement. Okay so I’m gonna
design in the way it only goes into one direction. Okay so now when we look at
this, we don’t want anything is blocking the stone, so for that extra, I cannot do
1D scale, because that will change the curve over there. I simply just need to
do a boolean difference, so let’s make a block and this block is somehow right
there inside of the body, and then we can do boolean difference this out of this
one. Before we actually boolean together, let’s take a look on the hole and the
size that we’ll need to work on. First if this is the pin size, let’s say we’re
going to have that extrude a “planar curve straight”, then we’ll have that as a
pin. Let me turn it in blue color. If the pin size is exactly with the hole
on this size, it won’t move. It will be super tight, so what we wanted to do is
have that to increasing the size just a little bit, and making a copy. We want the
pin follow the shape, so what we’re gonna do is we are going to “boolean split”. This
will be split by this guy, so we can get rid of those two.
so now we need to cut the hole out of both of them, so we are going to do the
“boolean difference” this and this will be different out from there. So
now you see the pin is slightly smaller to get through, and both of them has
the same size of a hole. When everything is set and done, we are going to boolean
these together, so now we have a proper hinge for the production. The key is
we need to have half of the left side and half of the right side. So what I’m
going to do is I’m going to draw a box snapping into the center. In the center
over here, and then make this box is able to cover entire area like this, and move
this up on the top view. We are going to use “boolean split” again. This
and this it’s going to be split by this one. So let’s take a look on that. We
can delete the one on the left, the right one on the right.
so let me also delete this stone right here. What we need to do now is to move
that one from this point to this point. Make sure they are hundred
percent aligned well. sometimes when you try to snap they may not snapping into
the right place. Okay, if they are in the right place, we are going
to pick up both of them, and then let’s do the “boolean union” so now they become
one piece. Okay this will be the element for us to do the “array along the curve”
then you will get something similar like this. I hope you like and enjoy the video.
please like and comment and share my video that will help my ranking on
YouTube. and help more students. Thank you, and I will
see you next!


  1. We want to explain to us Renault Kuros the whole way to open a file and save it and want to program B Arabic language and explain the Arabic language Thank you.

  2. Hello pj i have going to rhaino training from last week your tutorials r so good improve my training thank u so much

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