Ball Joint Boltable
thingiverse
Ball joint that is boltable between things that fit for you. Bolts and nuts M6. The smaller holes are for little pins that prevent the addons from turning. I used M6 set screws. These holes give enough "hold" for the screws. Just screw them in there. :) Remark: Inventor likes to scale the stl parts. So make sure to check the scale when processing it with your slicer. (I usual need to make it 10x bigger.)
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