This GoPro (action camera) mount is made to fit to my generic lockable ball joint eco system, which can be found here:
https://www.printables.com/model/370429-generic-lockable-ball-joint
As the inner thread inside the GoPro mount is a standard metric M10 thread (designed to fit to M10 metal screws when printed) you can also use it to connect to other M10 based mounts. But please note that the published M10 rod with 12mm has a thread-stop for a reason. If you simply force in a M10 screw until it is fully tight, you may damage the part on the inside.
Both parts are fairly easy to print. Put them on your print bed in the uploaded orientation and print them with a brim. No supports are necessary. The brim can be very cleanly removed with a hobby knife after printing. I recommend PETG due to its flexibility. Use a good number of perimeters to make the parts strong (at least 4). If you do that, 25% of infill should be fine. Due to the relatively fine M10 thread, I recommend 0.15mm layer height, but 0.2mm might be good enough as well.
All you need in addition the printed parts and a M5 nut for the GoPro screw, can be found in the parts collection of the generic lockable ball joint eco system.
Your satisfaction is my reward, please give me a like or publish a photo of your print if you like this design.
The parts are well tested and I trust that they are strong enough to hold and action cam (unless there is significant acceleration force applied to it). Still it is your responsibility to care for your valuables, I will not be to blame if you loose or damage your camera. Use at your own risk.
The author marked this model as their own original creation.