How to model a Wood Screw?

[Quick Karl]

Anyone know how to model a tapered screw? A wood screw is a good example of what I need to model.<?:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" />


Second - once I figure out how to model the tapered thread, how can I increase the root of the thread progressively along the axis of the screw?

 

[michael3130]

Yea, it can be done simply enough.


I've used surface intersections to create guide curves to get this tapered thread effect.


1 - Create your helix.


2 - Sweep a surface perpendicular to the axis along the helix


3 - Create a revolved helix the same shape as your taper of your wood screw and make sure it intersects with the helical swept surface.


4 - Create an intersection curve


5 - Sweep your thread profile along the intersection curve.


As for the second question, if I understand you correctly, can you not just create a second helical path at a different pitch?

 

[greghenson49]

go to 3dcontentcentral.com.....you'll find some wood screws there.

 

[Quick Karl]

As it turns out I need to model a dual-tapered-helix wood-screw; something more along the lines of a tapered drill bit, but with a higher twist rate than a typical drill bit. I've made some progress on the part so far so all is good, plus I can't read whatever language many of the parts on 3dcontentcentral.com are described in, so most of the stuff there is pretty worthless to me.