I’m not sure if this is the right place to post, I hope it is. I’m a mechanical student and don’t have a lot of experience on how to move objects (yet). For a project I have to move 4 items which are attached on shafts. I would like to be able to move those items 180 degrees inside and back outside. Picture: The items weight about 50kg each. How should I do this with bearings? How should I make those rotations? With 4 stepper motors or pinions or…? Thanks in advance.