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Thrust Tolerant Needle Bearing

by Qube3Bot Sep 19, 2017
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Hey, that`s good

Hi there,

thanks for this great design, it works pretty well, I'm thinking to made spoolholder bearing from these, I would need to increase the inner diameter of it in order to match the size I need, and add some solution for tightly fitting into the spool.
Do you think you can share the CAD file of this bearing so I could modify?


I can do that. The native file is from Creo. What CAD are you using?

Thanks, I'm using Fusion 360 :)

You probably need a STEP file. I've included both the native file and a STEP file.
A design consideration: An increase in the number of pins will also increase the number of clearances. This needs to be balanced out in order for all the pins to remain reasonably distributed rather than gathering to one side. If your goal is managing the OD, simply make the pins larger and reduce the ID. If you have some numbers in mind, I can quickly generate reasonable configurations for you.

Hi there,

many thanks, so actually the inner diameter I'd love to have is 12mm, I'm not sure about the outer diameter, because that would depend on the inner diameter of the spool, which can be vary...
So I was thinking to make something similar to this: https://www.thingiverse.com/thing:2198955 where, let's say, those "arms" are supposed to hold the bearing in the middle of spool.
is challenge accepted? ;-)
Many many thanks for the files, I'll look at them.


Steel ball bearing + Filament spool holder
by mordr3d

Try printing the attached stl and see how it turns out. 12.12mm ID (for clearance) and 32mm OD and 12mm tall.
If you need a clearance tweaked, just let me know. If it works for you, I'll post the STEP file.
Does Fusion 360 have feature recognition?

hey, that was quick, thank you, I'll try it now :)
talk to you in 2 hours :D

Hi there,

so I did the print, it got a bit tight, I'll try to loose it up a bit, as for me it looks good, I think it'll work if I manage to unstuck the pins.
on the other hand the internal diameter got 11.5mm, and the rod I'm using as axel is 11.6mm.
I'll try now to scale up a little bit in the slicer...

I managed to get the pins loose, I'll try to print with scaling up

These do require a bit of effort to clean up. They are also dependent on the type of filament you are running. Managed final ID is often very dependent on the slicer. However, I can tell you that a successful bearing will run in a wind-spinner with ease.

I've added the step file so you can play with it.

edit: These have been spinning for about 9 months :) https://photos.app.goo.gl/XKoLjJ4qCKRvQ24w8
The hub in this was still stuck to the build plate... https://photos.app.goo.gl/rsDhrd7hp9FsigJH6

That is PrintRBot PLA filament on a 3D Systems Cube 3. The effort comes in when you break up all the stringing going on in the small clearances.

many thanks again!

actually that's a realy good idea to make such wind mill toy stuff to the kids :) thanks for that too!

The design is genious! Inverting the principle of a ball bearing is awsome. Cool idea.

Thanks :) I just wanted a bearing that stuck to the build plate :p Stay tuned for a project build using this.