this post was submitted on 08 Mar 2026
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ADHD
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i've tried finding one i like for a while now, ever since i got a 3d-printer... i feel like i need something with more heft to it. weirdly the thing that has worked best so far was a cylindrical pill box which opens with a spiral motion. flicking the top makes it spin all the way open and it's smooth enough to close on its own.
Maybe you could leave some space in your print for some kind of weight you can glue in
probably, 608 skate bearings are pretty commonly used as weights. i'm not good enough at designing stuff yet though, i'm just browsing for other people's stuff.
It's really easy to add holes. One way is to just pop the shape you want into TinkerCAD, export as an STL, import into your project, add the part to your model as an assembly, toggle the shape type to a negative part, then position it where you want it. Then slice the plate, find the layer where you want to insert the weight, and right-click to add a pause. Then pop it into the hole and resume the print
Okay, yeah... I guess that is a lot of steps, now that I see it written out. But none of those steps are hard, lol. Takes like 5 minutes, once you've done it a couple of times.
I often put 4.1mm by 1.6mm cylinder holes into tiny prints to add 4×1.5mm magnets. If you want to add bearings for weight, I'd suggest trying a cylinder hole so it slides in easily. (I haven't tried it myself, but it makes sense in my brain that way).
I'm not sure the best way to keep it from sliding around in there, if your tolerances aren't right. Maybe put some glue in at the same time? If you leave it paused for a couple of minutes, I imagine the bed heat would dry the glue quickly, so it shouldn't ruin your print with moisture, I wouldn't think.
i could use tinker... but i'm trying to learn freecad. i found a model for a gearbox that turned out to be very badly optimised and to use waaaaay too much filament, so i'm trying to recreate it. hopefully that will learn me enough.
I use "better" CAD software for "real" projects, too, but TinkerCAD is really quick for popping out a simple shape, like a prism.
If you find one you really like and want heavier you could have it printed in metal with like shapeways or PCBway or something I bet! Or even metal-fill filament depending on your printer!
i probably could yeah! that's clever.