Hello everyone.

I need to draw a grain selector which is used in our single crystal production industry, it's kinda spring-like. Its real shape is like below.

A successful model is like below.

But all I can do now is to draw an assemble like

My question is how can I draw two ends curve up or down, so that two circle planes will be horizontal, then I can easily make a connection with other cylindrical parts.

My procedure is to draw a circle to make helix, then sweep with an circle.

Hope you could help me!

Great thanks!