I'm trying to increase the torque on the output shaft of my robot's gearbox. I have a motor with a pinion attached to it with 8 teeth. I want to create a gear with 33 teeth that will mesh with the pinion that I currently have. I've got access to a 3D printer to make the gear, but I don't know how to design the second gear so that it will mesh properly.
What parameters do I need to know about the first gear (8 teeth) to ensure that the second gear (33 teeth) will mesh correctly? How do I translate these parameters into the design of the second gear?