How do you create a spring ball in Autocad?

Can anyone show me how to create a helix in Shape f ball Autocad?

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2 Answers

Stupid question... What is a spring ball?

 
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I understood!
Firstly create sphere. Then create cutting profile, as your desire shape. After that, create path of the cutting profile as helix. Finally cut the sphere by profile following the path helix. Then fillet the sharp edges.....

 
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