Modeling a Sheet Metal Screw

Terry Capps · 26th September 2011, 10:43 AM

I sometimes model mechanical assemblies that are quite small so that I can see how all the pieces will fit together before I actually build it. I know how to model a "machine" screw, but I am having trouble modeling a "sheet metal" screw. For most of the screw, the thread modeling is basically the same as it is for a "machine screw", but at the end of the screw the diameter of the shaft and threads decreases down to a point (see attached pictures). I can imagine doing it if there was a "revolve_with_scaling" function, but there isn't. The "Extrude_with_scaling" won't work because the profile of the thread needs to revolve around the shaft, not just move around it.

Does anyone have any idea how to do this?

26th September 2011, 10:43 AM	#1
Terry Capps Senior Member Professional user Join Date: Dec 2004 Location: Corsicana, Texas Posts: 133	Modeling a Sheet Metal Screw? I sometimes model mechanical assemblies that are quite small so that I can see how all the pieces will fit together before I actually build it. I know how to model a "machine" screw, but I am having trouble modeling a "sheet metal" screw. For most of the screw, the thread modeling is basically the same as it is for a "machine screw", but at the end of the screw the diameter of the shaft and threads decreases down to a point (see attached pictures). I can imagine doing it if there was a "revolve_with_scaling" function, but there isn't. The "Extrude_with_scaling" won't work because the profile of the thread needs to revolve around the shaft, not just move around it. Does anyone have any idea how to do this? Attached Thumbnails Last edited by Terry Capps; 27th September 2011 at 10:54 AM.