Sounds like I found a number of bugs in Solidworks and good subject to make  a lesson on.

I am fairly new to Solidworks, however I am not new to 3D CAD.

I made a sector with inner teeth + a gear in the same part. "ratchet one half"

Then I separated them into two different files. "Body1" and "Body2"

Than I started an assembly.

I want there to be a relationship between the outer cog surface (that faces in), the small gear with two surfaces and the inner cog surface (that faces out).

I tried to do this with variables but I cannot make a global variable for this assembly that everything will obey.

I don't see the parent part for one of the sectors so I cannot access the sketch of it. I have to go to the ratchet one half.SLDPRT for that.

But how do I tie it back to the assembly?

The large cog surface has 50 teeth. The small cog surface shoud have 40. The sprocket has 10 teeth and 8 teeth. That is because 5*10=50 and 5*8=40.

This small gear will be at a bisect from both sectors.

I am not sure what is going on in my model.

Please help.

This is a class-related project and if I wont finish it in a month I will have a bad grade.

If you want to make a video on how to make something like this work, I would really appreciate it.

Please help me. Thank you.

Parts will be printed on a 3D printer and made into something that I will have to present.

I hope that I attached everything that is needed to show the problem.

I don't want you to do my work.

If you can explain this on a simpler model, this will be nice, but I am not sure where there are bugs and what problems come from my misunderstanding of the subject matter.