AUTOCAD Questions and Answers

How can you make a spring, spiral or screw thread?

To make a spiral or screw thread use an AutoLISP routine such as spiral.1sp, it will create a spiral path according to your need. Then you can use EXTRUDE command with a reference object, using the spiral as the path.  Also, there is another way you can do this, by using Mechanical Desktop (MDT) or Autosurf by using augmented lines as path.