thread

oldřich_sazama

I have a small problem, I try to create a thread and no success

https://cad.onshape.com/documents/cd182c6c970e5f7f3e1f322a/w/f0b78c05d481c7aeece4a5e6/e/10ca24f2f91fde9b443fa1cf

owen_sparks

Hi @oldřich_sazama

Couple of issues, the first being your sketch does not hit the sweep path helix.



So in this copy of your document I've added a "pierce" constraint to the sketch to make sure they connect, and also rotated the helix 90deg so we start on the end of it:-



https://cad.onshape.com/documents/4ffe7c28846ac9377418b383/w/13461373e469618f37d1b49a/e/474e97fee2d3aee67164c4a0

Worth noting that unless you really need them modeling threads is not good practice.  They add a lot of overhead to the model, and if making for real then you'd probably just want the pilot drill hole in 3d with a note on the drawing to add a thread.

BTW nice project, I really miss target shooting (all but banned in the UK) so would love to be doing this kind of project.

Hope that helps,

Owen S.

owen_sparks

Hi, sounds fun.  I really miss my .22lr rifles and pistols

If you 3D print I would do this.  Add a hole for a nut.





If you use metric nuts then there is a custom feature to make the holes.  All you need is a point in a sketch.

 I've added it here:- https://cad.onshape.com/documents/4ffe7c28846ac9377418b383/w/13461373e469618f37d1b49a/e/474e97fee2d3aee67164c4a0 if you wish to try it.

Owen S.

owen_sparks

Hi @oldřich_sazama

Couple of issues, the first being your sketch does not hit the sweep path helix.



So in this copy of your document I've added a "pierce" constraint to the sketch to make sure they connect, and also rotated the helix 90deg so we start on the end of it:-



https://cad.onshape.com/documents/4ffe7c28846ac9377418b383/w/13461373e469618f37d1b49a/e/474e97fee2d3aee67164c4a0

Worth noting that unless you really need them modeling threads is not good practice.  They add a lot of overhead to the model, and if making for real then you'd probably just want the pilot drill hole in 3d with a note on the drawing to add a thread.

BTW nice project, I really miss target shooting (all but banned in the UK) so would love to be doing this kind of project.

Hope that helps,

Owen S.

oldřich_sazama

Thanks lot. I am from Czech republic guns is not banned here yet. And if I model this for melat CNC yea I not make threats but for 3d print I like to try. PS this is for .22LR rifle for bipod. 

owen_sparks

Hi, sounds fun.  I really miss my .22lr rifles and pistols

If you 3D print I would do this.  Add a hole for a nut.





If you use metric nuts then there is a custom feature to make the holes.  All you need is a point in a sketch.

 I've added it here:- https://cad.onshape.com/documents/4ffe7c28846ac9377418b383/w/13461373e469618f37d1b49a/e/474e97fee2d3aee67164c4a0 if you wish to try it.

Owen S.