Need a tip on threads: how do I extend to the ends of a rod without a massive chamfer?

Lyle_Walsh

threading a rod or cylinder, the helix ends at the ends but the threading needs to go past that or else i end with blind pockets.

_Ðave_

Just make an extra working cylinder which is longer than the actual one and create the helix on the working cylinder.
then hide the working cylinder. HTH

NeilCooke

Hi @Lyle_Walsh hopefully this blog post will explain a technique

https://www.onshape.com/cad-blog/tech-tip-how-to-build-a-nut

coleman

@Lyle_Walsh
You can chamfer the ends before you sweep the threads and that should solve your problem 

Lyle_Walsh

so no way to get the helix extended?

_Ðave_

Just make an extra working cylinder which is longer than the actual one and create the helix on the working cylinder.
then hide the working cylinder. HTH

Lyle_Walsh

Thanks _Dave_ BUT now i have to make its mate and add the thread to the cap.  If I use an extra cylinder the thread goes too far.  I got around that by making a box for trimming.  ANY hints?