Metric Spur Gear design in fusion360 Module 1. I uploaded various size in stl but with the F3d file you can modifiy the Module and the number of teeth quite easily with the User parameter. Four differents size, 15, 30, 45, 60. The two set screw holes are 3.3mm ready to be tap for a M4x7 thread. Bore hole is 8mm. The gears is 20mm thick.
I printed them on the Ender 3 Pro(no mods) I printed them with almost all suggested setting from Cura. 20% infill top and bottom layer 0.8, nothing fancy.
Here's a link to a video of how I made it.
I got the idea to design it this way after seeing @Makersmuse video about user parameters
I used OVERTURE PLA filament that work perfectly fine for this simple project : https://amzn.to/2TR1dfR