Hello everyone,
I want to build a robot-arm and for this reason I ran into the problem, that I have cables which twist at a certain point.
If I turn around to hard, they would tear apart. So ist there a "gadget" which can take one cableside, twist inside of it and another independet cable side. Pretty hard to explain so I drew a basic sketch on how I imagine it to work.

 

It's called a slip-ring.
https://www.adafruit.com/category/230

 

@nsaspook Thanks a lot! That is exactly what I was looking for!