How to make 3D spring profile in AutoCAD

This video illustrates all the steps involved in making this 3D spring model

  1. Step 1:

    This is final rendered image of spring profile
    And you will find complete video tutorial here https://www.youtube.com/watch?v=HxLBxDofRJ0

  2. Step 2:

    I selected arbitrary dimensions to make this model just to keep making this profile simple.

  3. Step 3:

    In a step spline has been converted to polyline before sweeping the circle over helix profile because it was returning error while sweeping on spline.

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