kmutlu
nice
This is my first and smallest 3d printed bowl feeder. You get both the .stl files for printing as well as the SolidWorks files for modification. You can see a video of it running with M3 hex nuts here: https://www.youtube.com/watch?v=xXfcDdvP9jU
I print all my bowl feeders in ABS plastic as I find it gives excellent wear characteristics. I finished the prints by sanding the working surfaces smooth and then wiping them down with acetone on a rag. This will significantly lower the force needed to make parts feed.
This is a very basic design - if you intend to use a 3d printed bowl feeder for more than experimenting I recommend that you consider my MKII or MKIII bowl feeder instead which are more mature technologies.