I have a worm gear set with no drawings. I need to model them. The only things I know are 1) The Gear ratio is 30, and the worm gear only has one thread. It is a single start as opposed to a multi start worm. 2) The diameter of the worm is 0.7 Inches, and the length of the worm is 0.852 Inch 3) The diameter of the gear is 1.007 Inches, and it has 30 teeth.
I do not know the pressure angle, diametrical pitch or gear module.
What other piece of missing information would I need to know? How do I go about figuring out the diametrical pitch? How do I figure out the module.