I was surprised to find that there was not a nice slew drive design on Thingiverse so I made one. It's completely* parametric so you can integrate it into your projects. It's perfect for moving a large load around (for example a telescope or solar panel) with a deep reduction ratio. A NEMA 17 stepper should generate significant torque using this. It uses 6mm BBs for rolling elements
The STL files are for a randomly chosen 100mm gear. You can adjust this for your own needs. Change the gear ratio (This will require tweaking my gear tooth profiling).
*Parametric but you might need to tune it a little.
PLEASE REMIX. I'd love to see this get more advanced features like an hourglass worm.