hihow we can make spiral by extruding a circle, in autocad 2016thanks

Hello durrani11, first you have to do an HELIX then place your circle at the extremity then SWEEP it along the helix.This will give you a spring for example and it can be an other thing than a circle but any shape as long as it's a REGION.The helix may not be of constant diameter, you will have to set the properties of it and you can draw an approximate helix then open the properties pannel ( Ctrl+1 ) to set the dimensions.Please tell us if this helped or not.Eventually see the Tpi 835 listed here under : How to draw a spiral in AutoCAD?
philippe JOSEPH2021-07-25 08:42:49