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leeminardi
en respuesta a: ksporry

Start with a cylinder and a helix.  The radius of the helix (red) is smaller than the radius of the cylinder.

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CReate a closed polyline profile of the thread shape (yellow) and position  it at the start of the helix being careful to orient it on a plane that contains the centerline of the cylinder and the endpoint of the spline. The white line was used to help define the UCS and position the shape.

image.png

 Sweep the shape along the spline.

image.png

Subtract the swept profile from the cylinder.

image.png

 

Use the Windows snipping tool to make screen captures. It's better and easier than using a camera!

lee.minardi