I made this a while back when I couldn't find a place to buy the specific spring I needed for another build. I hope also you will find use of this.
Print settings:
15% infill, 2 walls, PLA
Usage:
Notes:
The model creates spring which are about 12mm in diameter measured from the center of the wire. Scale it to your needs but mind that the hole at the bottom might need to be drilled to make the wire fit after scaling.
I used regular steel wire for this and they are surprisingly strong and hold their shape. Ideally you would want a special steel type for making springs.