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  • significance of cosmetic thread feature

    Discussion in '2D and 3D CAD general discussion forum' started by ajit332, Sep 1, 2010.

    1. ajit332

      ajit332 New Member

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      Hello, can anyone tell - the significance of cosmetic thread feature used into CAD modeling / drawing...
      :cry:
       
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    3. gupta9665

      gupta9665 Well-Known Member

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      Cosmetic Threads are used to represent threads (both external or external). The idea is to save time and reduce file by avoiding to create the actual threads on the part.
       
    4. DesignTechnologist

      DesignTechnologist Member

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      I don't typically add any cosmetic threads at all to my DWG's. Looking at the DWG, it would look like a hole. The call out would tell what the thread is. The local machine shops we use like this better because it doesn't clutter up the DWG with thread features since they are looking at the call outs anyways.
       
    5. maniacal_engineer

      maniacal_engineer Well-Known Member

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      If you put cosmetic threads on a hole, then use the 'add hole callout' option under annotations, then the thread callout is put on the drawing, as well as the hole size and depth. The nice thing is that they update dynamically. I think the display of the threads can be suppressed if you don't like it.
       
    6. dakeb

      dakeb Member

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      You need to include cosmetic threads so your drawings comply with draughting standards, open outer circle in plan, dotted thread lines in hidden elevation detail, solid double lines in section.
       
    7. broby

      broby New Member

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      Some CAM programs will also recognise cosmetic threads and insert a tapping operation automatically. If you only show a hole you then need to correctly identify the thread operation manually.
      Also, if the hidden lines are shown on a drawing with multiple holes that are tapped and multiple plain holes, do you honestly think it is a good idea to not show which holes are tapped and those that are not? I do not think it is a good idea to rely solely on a single callout pointing to one hole only in that circumstance.
       

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