CAD tip # 836:

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How to draw a 3D spiral in AutoCAD?

To draw a spiral curve use the 3DSPIRAL function in the SPIRAL.LSP utility - can be downloaded from Download.

If you need a 3D coil (spring) as a solid body (model), draw a circle (or another profile) and extrude it along the 3D spiral trajectory using the _EXTRUDE command. Or use the SOL_SPRING function in the LSP archive as above (sol_spring.lsp).

You can also use the SPRING utility from Download to model 3D solid springs (helical objects).

Since AutoCAD 2007 you can also use the HELIX command.

ACADACAD2008ACAD2007MDT

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2.1.2001 107129× FAQ

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applies to: AutoCAD · AutoCAD 2008 · AutoCAD 2007 · MDT ·

See also:
Tip 13960:	Fermat's spiral in AutoCAD.
Tip 13906:	How to construct a 2D spiral shape in Inventor?
Tip 13653:	FPoly - draw fixed-length polylines in AutoCAD.
Tip 13163:	Blended transitional solid between irregular regions, circle-rectangle transition (3D in AutoCAD)
Tip 10708:	Modeling compression injection screw for molding machine.

Selected tip: How to transfer your Plot style table to Excel?

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