Hello my name is Jeffrey Cabrera. I had a question about involute spur gears. So I have some gears already assembled with motors but I don't know their sizes, in order to create a new gear to combine four of the gear(like a planetary gear) that will be connected with a fifth motor that will drive the new gear. Is there a way to get these measurements? All I have is a caliper. Thank you. I need this information for a class project. Thank you