Pendant w/ Thread - Need Help

Discussion in 'Design and Modeling' started by 6516440, Apr 13, 2012.

  1. 6516440
    6516440 New Member
    Hi,

    What im doing:
    So I am designing a pendant to give to my girl friend. It will be the first thing I print on shapeways. The idea is the pendant will hold a message on a piece of paper wrapped around a pin inside. The pendant will be two parts and made of sterling silver. My CAD skills are more then adequate to produce the pendant, Im using solidworks.

    The problem:
    Im not sure what specs I should give the screw thread. So i wanted anyone's advice on the pitch, clearance and size of the thread. The nominal diameter is 4mm. The pendant is pictured both with a cross section and with out. I have read the material data sheet, but the minimum detail of 0.6mm isn't as much clarification as i would like.

    Any help or feedback would be appreciated as im looking forward to doing more projects through shapeways.

     

    Attached Files:

  2. bradykineticcuriosities
    bradykineticcuriosities Well-Known Member
    You could model the thread easily, but your tolerancing will vary depending on how it is oriented in the build.

    This is just an idea, but what about having a pin lock? I couldn't find a picture of an example, so I uploaded a quick concept.
    Pin lock.jpg

    The transverse pin is inserted and turned clockwise to lock - it would be ideal to have some sort of detent so it would stay locked.
     
  3. 6516440
    6516440 New Member
    Thanks for the response, Unfortunatly i submitted my order a day ago. I will post some pics of what I did.

    As for your idea, i do like edison sockets, i should have thought of that.

    i left a gap of 0.1mm between the threads, i hope thats enough for the tolerances.
     
    Last edited: Apr 26, 2012
  4. bradykineticcuriosities
    bradykineticcuriosities Well-Known Member
    If it doesn't work out you can get a tap and die and clean up the threads - assuming you modeled a standard thread that is.

    Let us know how it goes!