Standard Spiral Tool in Illustrator can create only logarithmic spirals, but what we should do, if we need spiral with equal distance between turns - Archimedean (arithmetic) spiral?
This is really simply. First step - create several parallel lines.
Select right anchor points with Direct Selection Tool and move them a little up.
Here is what we got.
Group all lines....
... and drug-and-drop to Brushes window.
Window "New Brush" will appears. Select "New Art Brush".
Type a name or just press "Ok" button.
Create a circle and apply your new brush.
I hope this tutorial was helpful. Thank you for reading this and good luck!