Why isn't a custom (user inputed) pitch value not allowed for "tapped" hole features?

StephenG

I recently had a need to model a M12 x 1mm threaded hole to accomodate an off the shelf component.  

  
The only pitch values available to me are those in a limited selection list. Why can't I override the pitch value?

Two additional comments:

1. The "Tapped" for hole type term really should be "Threaded". Tapped implies a specific manufacturing process to produce threads; there are other equally valid means to create a threaded hole.
2. When using the Hole feature to create a threaded hole there is no visual indication that the hole is threaded. The lack of a visual indication makes it more difficult to understand important aspects of the part design by simple visual means. 

An option to add a helix type curve to the Hole feature, representative of the actual threads created, would be really helpful and should not result in much of a graphics performance penalty, especially compared to modeled thread geometry.    


Even something as simple as applying a texture map, or a color difference from the base part for threaded holes would be very helpful. 

(Please do not suggest the use of the Thread FeatureScript to model the thread geometry. That is not a practical solution.)  
    

sebastian_glanzner

Hi Stephen,

I'm also struggling with this. It seems like the fine metric threads are missing. 

If you need a helix which is always attached to the part, you can try my feature script:
https://forum.onshape.com/discussion/10835/new-featurescript-cosmetic-threads

john_mcclary

Couldn't have said it better myself @StephenG

make sure to add your votes to these Improvement requests
https://forum.onshape.com/discussion/8745/cosmetic-thread-in-onshape-then-easily-distinguish-between-different-hole-in-3d

https://forum.onshape.com/discussion/6857/external-cosmetic-thread

sebastian_glanzner

@StephenG

I had an idea! You can browse the featureScript source of Onshape and find two featureScripts you will need:

hole: https://cad.onshape.com/documents/12312312345abcabcabcdeff/w/a855e4161c814f2e9ab3698a/e/75b72139bd104b1bbf74528e
holetables: https://cad.onshape.com/documents/12312312345abcabcabcdeff/w/a855e4161c814f2e9ab3698a/e/7404cb4ca6ff18ada8fce168

Start a new document and create two featureScripts. Copy and paste the text. 

In your custom holetable script you can add new tapped threads or dimensions:


In your custom hole script you have to link to your custom holetable by using import:


I just tested it and it works 


This is not ideal, it is only a workaround.

john_mcclary

Nice @sebastian_glanzner !

StephenG

If it possible to create a custom variant of the OS native Hole feature, wouldn't it be possible to modify the UI and replace the Pitch selection list widget with one that allows user keyedin values? 

cemturkmen

I have the same problem but why do I have to deal with script for a simple "Text" that will only appear on the drawing. Pitch is hugely important in manufacturing and assemblies. It must be possible to choose desired pitch. For example I use M46x1 nut, I should not change the pitch manually in every drawing

paul_bunnell

I love my OnShape, but this is the first time I have seen a fundamental feature that is inadequate.  I hope an update is being worked on!