where to find Acme screw model?

[cadastrophe]

I have been looking for an accurate full Acme screw, but any so-called models I've seen on suppliers sites are just simple cylinders.
Does anyone know where I can find a full model or information on drawing one?
TIA

 

[borgunit]

I do not know if this is what you want. Give it a peek.

http://www.eng-tips.com/viewthread.cfm?qid=42158

"Everybody is ignorant, only on different subjects." — Will Rogers

 

[CADSTUDENT]

You have hit upon what is missing in ACAD. The problem is how to build a 3d helix in ACAD. This function is in MDT and Inventor. I use an aftermarket plugin called 3DPOWER tools to build the helix which is listed in the eng-tips forum. Afterwards, I draw the screw blade and extrude the blade using the path option. Everything else is easy.

Hope this helps,
John

 

[acaddesigner]

If you are looking for a helix, try

http://www.3designersmate.com/download.

It is a free 3D spiral/ Helix application which makes a 3dpolyline for you.

Hope this helps
Paul