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I am by no means a gear guy but.....
Do you have any further basic information, like pitch diameter?
@
going to need more so... suggest to go to the source of your step file and ask the questions but...
assuming a helical spur gear (may need some modification)
Here is what you are trying to find for the basic spur:
This is what is needed to get there
There is more for the helical part of the gear but this is most of the way there