Unfortunately, I had written catia instead of solidworks.I have dimensions from an article and i attached it for you.1. I'm sure someone here can help you. What have you modeled so far? Do you have any dimensions indicating the size of your part?
2. You say you are new at CATIA, but you asked your question in the SolidWorks forum; which CAD system are you using?
Thank you for your answer peterYou can start by creating a revolve for the center shaft.
Then create a helix out of three sections: a tapered one that has an increasing diameter, one with a constant diameter and a tapered one with decreasing diameter.
Create the shape of the section that revolves around the shaft. Could be a rectangle.
Create a sweep that uses the spiral as a guide and the rectangle as a profile.
That should do the trick