OpenSCAD - Model a Bearing in less than ten minutes.
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- เผยแพร่เมื่อ 25 ธ.ค. 2016
- This shows how you can easily model a bearing in OpenSCAD.
You can find code for this video at ( the code may be slightly different than in video ):
github.com/mathcodeprint/open...
There are two examples there:
simplebearing.scad - This example is just the bare bones. No fancy parametric stuff here.
github.com/mathcodeprint/open...
parametric_bearing.scad - This shows how to use "Parameters", you know those things us mere mortals call constants. It also has the bearing as a module, and how to use the module.
github.com/mathcodeprint/open...
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Everything I print is directly converted to millimeters so I would say the units are millimeters and thats a nice thing to count on without having to scale
That was slicker then Eel doody! a 3 minute roller bearing! badass my man!
Thank you very much for the video, it was the first think I made with openscad! I believe I improved on yours slightly and it didn't add too much complexity to include the radius'd edges. I look forward to following more of your videos!
//X,Y,Z
//Another attempt at a bearing
//Render Options
$fn = 50;
//variables
rw = 08.00; //Race width
r = 00.50; //Radius
id = 20.00; //Inside diameter of bearing
od = id+(rw*2); //Outside diamter of bearing
c_rw = rw-(r*2); //Corrected racewidth after minkowski
d_bb = 05.00; //Diameter of the ball bearing
r_o = d_bb*0.50; //race opening for lubrication
//Bearing race assembly
rotate_extrude() {
difference() {
//bearing races
translate([((od/2)-(rw/2)),0,0]) {
minkowski() {
square (c_rw, center = true);
circle (r = r);
}
}
//bearing path
translate([((od/2)-(rw/2)),0,0]) {
circle (d = d_bb);
}
//cut out for bearing lubrication
translate([((od/2)-(rw/2)),0,0]) {
square([r_o,rw+r], center = true);
}
}
}
//Ball bearings
for (ball = [0:30:360]) {
rotate([0,0,ball])
translate([((od/2)-(rw/2)),0,0])
sphere(d = d_bb);
}
Very nice video, learned a lot in a small amount of time. Thanks, Patrick
Hi, can you make a video where you create {whatever I need}?
Nice and simple subtraction and circular extrusion.
FANTASTIC!! Thank you for sharing this
Thank you !! impressive and simple.
Pare ser una herramienta de diseño 3D muy buena.
Trataré de usarla para ver si la adopto.
Saludos desde El Salvador.
I dont know if a newer version solved this better but the rotate_extrude() function might be missing parameters of how it defaults. You had the shapes on the XY plane and they extruded while rotating about the Y axis and maybe thats a logical though process by the dev. I don’t think its too unusually. I would first think you stay within a plane, say your objects are within XY and you rotate about X but this is cleaner to think about (that you are drawing your cross section)
Hi Do you use an external editor for openscad. If not why not.
I understand thanks
can you create joints in openscad? (i think theyre called mates on solidworks)
Hi, there, just getting started in SCAD, and this is a super helpful tutorial to get acquainted with the language!
4:40 did you mean for that circle to be off-center of the rectangles? Maybe the circle should be translate[15,0,0]) circle(3.5)? Or am I ignorant of good bearing design?
Oh yeah, it seems to be a mistake because 4:25 "that's the centerpoint between these two...". The center point is 15.
Same with the balls at 7:55 ... rotate([0,0,ball]) translate([15,0,0]) sphere (r=3.25)
No, I think this was addressed in the comments quite some time ago. I was just going for an approach.
@@mathcodeprint Okay, thanks! This was very helpful, and I've been able to use openscad for a couple drawings already. Thank you!
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Thanks for the video, there are a few things I'm confused about.
the halfway point between 10.5 &19.5 is 15, not 14.75. I don' understand why the finished product looks right yet this non centered point is painfully apparent when taken one step at time?
rotate_extrude(){
difference(){
union(){
translate([10.5,0,0]) square([5,7],center=true);
translate([19.5,0,0]) square([5,7],center=true);
}
translate([15,0,0])circle(r=3.5,center=true);
}
}
yet this works exactly the same.
//rotate_extrude(){
//difference(){
//union(){
//translate([10.5,0,0]) square([5,7],center=true);
//translate([19.5,0,0]) square([5,7],center=true);
// }
// translate([14.75,0,0]) circle (3.5);
// }
//}
just put this in and you can see it's not centered?
union(){
translate([10.5,0,0]) square([5,7],center=true);
translate([19.5,0,0]) square([5,7],center=true);
}
translate([14.75,0,0]) circle (3.5);
But I finished your final and it appears to be centered? Very confused by this?
The reason for the measurement difference is because of the limited vertices in a single sphere correct? Given the sphere was perfectly round, they would be touch at 15?
Add comments, and you will remember for later. :-)
The races are not the same thickness I guess. The sphere is right where he subtracted the circle from the two squares.
How did the height of the object change when you did Rotate_Extrude() ? it was a flat 1mm piece. But after you did the Rotate_Extrude, it was all of a suddenly 10mm tall?
I would like to know too
@@alttrashpoubelle7602 according to the docs (top Google result for rotate_extrude) the 2d shapes get automatically rotated 90 degrees round the X axis before being extruded round z. Kinda weird.
Actually that's mentioned at the 9 minute mark ☺️
How WOULD one add a bevel or a chamfer to the outer edge of the ring? Would it have to be cut using a separate piece of geometry?
Yes. Generally speaking you would use a difference to remove the material. In another video I try to build the raceway starting with 2d geometry and rotate_extrude. In that case you can include the chanfer in the 'sketch'. Chamfer and Fillet can be difficult. There are also various libraries that can help with this.
@@mathcodeprint I've been doing some digging on forums. It seems that this is simply one of OpenSCAD's natural shortcomings. It's hard to bevel an edge when it can't be selected explicitly, and as an edge grows in complexity, beveling it becomes more difficult and expensive.
It's quite easy to bevel. I drew another square and a difference between that and a circle to create the bevel shape, then moved it to the correct location, then a difference with the rest:
rotate_extrude(){
difference(){
difference(){
union(){
translate([10.5,0,0]) square([5,7], center = true);
translate([19.5,0,0]) square([5,7], center = true);
};
translate([14.75,0,0]) circle(3.5);
}
translate([-19,0,0]){
difference(){
translate([40,0,0]) square([5,9], center = true);
translate([37,0,0]) circle(5);
}
}
}
}
Thanks from 6 years in the future.
Can you make a video of how to design a mechanica siren rotor And stator???
electric engine!
at 4:43: why is the center 14.75 and not 15? which is the center between 10.5 and 19.5?
Because i am a little careless at times :)
@@mathcodeprint Thanks god, you are human !
$fn = 50;
rotate_extrude(){
difference(){
union(){
translate([10.5,0,0]) square([5,7], center=true );
translate([19.5,0,0]) square([5,7], center=true );
}
translate([14.75,0,0]) circle( 3.5 );
}
}
for ( ball = [0:30:360] ) {
rotate([0,0,ball])
translate([14.75,0,0])
sphere( r=3.25 );
}
notice something is wrong with the codes but its always a damn typo lolol
And every time I saw it coming haha
Why the need of union?
So the difference is applied to the union in one operation. Otherwise you would need to apply difference to each square separately.
pretty underwhelming until six minutes 20 seconds in. Then I saw the light.
Can it be printed without support? the balls would be floating.
PLZ ENLARGE the FONT
can u fakin give link
Absofakinlutely :) , look in description, just added.
@@mathcodeprint
❤️❤️❤️
Openscad has got to be the most stupidest 3d software out there.
@Robert Slackware no because a modern 3d cad is way better at everything this is trying to do. I am really hard pressed to find what makes someone use this.
@Robert Slackware If someone uses the machine that controls the CNC to draw in 2020 they are stupid. A 3D cad capable machine (for simple drawings and assemblies) can be had for under 400euro easily(not even taking 2nd hand into account). When cnc machines and their components cost many times that.
But this would have been a valid point about 10 years ago for sure.