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? About helical internal gear in SW


New member
Hello, and please help:)
How can I create a Helical gear With internal teeth? I've searched the toolbox and I could not find anything.I know the complicated way of plotting with the involute profile, but I'm looking for something easier, like a site to generate the gear-weel.

I have a second question.
Is there a way when I create an assembly with 2 models to merge them in one whole body instead of two contiguous?

Thank you in advance