See video for more details https://www.youtube.com/watch?v=9irox5Cnp1w
This is a simple pet kibble dispenser, made to exactly fit a cheap easily available stepper motor.
Check out this great remix that adds extra parts: https://www.thingiverse.com/thing:3424616
Print "screw" and "whole"
I've provided "testBearingRing" so you can print this to compare with your bearing size, before printing the whole model
Arduino compatible board
28BYJ-48 Stepper motor
Stepper Controller (ULN2003)
(Optional) 608RS Bearing 8x22x7mm (or equivalent)