Inside thread flaw

jpoppinmoneyunit

Hi, can you give some advice on how to make inside threads end and start in a taper?

Here's a picture of the issue I have, either the thread stops abruptly or it will make an odd pocket in the design.

John_P_Desilets

 jpoppinmoneyunit

Can you leave a link to your document for us? Please be sure to share it as public. Thank you in advance!



I made a quick example of using the revolve tool for creating a thread. I have the chamfer made in the initial sketch before doing the sweep cut. 

https://cad.onshape.com/documents/78418b14ffc60bc369dba865/w/6532603cd21f075aa31c4479/e/720962d71b32fe9ac2e728bb

coleman

@joppinmoneyunit

I usually just revolve remove the face where your thread ends.  It doesn't give you the taper you are looking for but it does clean it up and transition as opposed to the abrupt stop.  

Create a sketch on the triangle face where your tread stops, use command for the entire contour, revolve remove with the base of the triangle as the axis.  

John_P_Desilets

 jpoppinmoneyunit

Can you leave a link to your document for us? Please be sure to share it as public. Thank you in advance!



I made a quick example of using the revolve tool for creating a thread. I have the chamfer made in the initial sketch before doing the sweep cut. 

https://cad.onshape.com/documents/78418b14ffc60bc369dba865/w/6532603cd21f075aa31c4479/e/720962d71b32fe9ac2e728bb

jpoppinmoneyunit

Hi guys. Thanks for the input.  Apparently I don't have email notifications on.

Here's a link to my model. 

https://cad.onshape.com/documents/f513f984b0eca2e4926b1761/w/d0cedc316d2ba6b390050559/e/80a3e0078325288df1c9a145


I will try both suggestions and see what works best!

jpoppinmoneyunit

I think I got it fixed.   It definitely would be nice to have a thread tool that will automatically reduce the taper on threads so it has a nice transition.