Spinning Double Ball Bearings

by idea_beans, published

Spinning Double Ball Bearings by idea_beans Dec 14, 2012

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16700Views 2392Downloads Found in Mechanical Toys
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After printing a few spinning gears and ball bearings, I thought why not combine them together to make a toy? The gear part was then modified to look like a saw blade so it looks meaner.

Not really sure if this classifies as a toy, but I've used them as coasters before and they worked great!


This thing is easy to print. Everything is printed in one go, and then you just have to remove the raft and supports. Give the balls a bit of cleaning and pushing, then they'll get loose eventually.

I printed these on UP Plus 3D printer. 0.2mm - 0.3mm Z resolution. Speed: Normal or Fast.

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16700Views 2392Downloads Found in Mechanical Toys
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im legally blind

i can see, BARLY!

I TRIED printing this on a 3D CUBE this morning, and had bad luck. I am not sure why. My machine began the print perfectly, but when the items thickness got to be about 1/16" thick the print went haywire! My settings are fine, but something in the program caused a spacing malfunction as near as I can tell. It could very well be my machine, but if anyone else has this issue just make a note of it! Cheers, Clint

Great model !
But, unfortunately, I have a problem..
When i choose the STL file in slic3r (version 0.99) It says it has self-intersecting faces and the Gcode comes out wrong.
I tried to repair the file via http://cloud.netfabb.comcloud.netfabb.com but it doesn't work!
What should I do?

This comment has been deleted.

Hi, I'm not familiar with slic3r so I'm not sure why it couldn't print the file. When I drew up the model, I had allowed enough gaps between the ball bearings and the walls so they don't touch each other. I have printed many of this models so far and they all came out fine on my UP Plus printer. Maybe you can ask someone who uses the same hardware/software as yours and see if they can print this one okay? Thanks

Oh yeah, printed with ABS

Works great on replicator 1. full excelleration.. .2 layers 235 extruder temp. Full support. It took a little bit of tinkering and twisting, but everything works great!!

hi, can you share the design files? I wanted to make the pins on the outer ring a little longer so its a bit more secure.

Hi, what material did you print it with? All the ones I've done they were all tight fit because I only allowed 0.8mm gap between each ring, and the pins were around 4mm long. I reckon if you made the pins too long, they would stick too far inside the bearings and obstruct the balls. I can only export the file as STL or 3DS, so I'm not sure that'll help. Maybe you can use MeshMixer or Meshlab to modify the STL file I've uploaded? Thanks :)

I used ABS. Maybe i could use Meshlab or Blender to modify it. Ill have to try it out. It might be better to just increase the thickness of the outer ring so it isn't so flexible.

It may be because of those circular cutouts on the outer ring that made it flexible. I can always reduce the size of those circles and upload another file, but it may not look as good. :)

I like the one with the smaller centre. Looking for design to encapsulate each wheel. No experience with this , suggestions?

When you said 'encapsulate' did you mean a sphere to enclose the ball bearings? I haven't seen any bearings in sphere form yet, but maybe it's because after the object is printed, the supports will be too hard to remove from inside the spheres?!

You are probably right. But i am trying to get the wheels spinning around each other on a pin and then make a sphere that screws together around it- I could use some help! Argh!