Ok, sorry let me try to be clearer. I measured the diameter of a 50-tooth gear (excluding the teeth) to be approximately 1 and 1/8th of an inch. So to find out how many teeth on one inch, I divided 50 by 1 and 1/8. This gave me around 44 for the pitch. Is that correct? Sorry if I sound clueless, this is the first time I've worked with this kind of mechanical engineering.