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Pendant w/ Thread - Need Help [message #46943] Fri, 13 April 2012 14:24 UTC Go to next message
avatar 6516440  is currently offline 6516440
Messages: 2
Registered: April 2012
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Junior 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.

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Re: Pendant w/ Thread - Need Help [message #47488 is a reply to message #46943 ] Wed, 25 April 2012 19:02 UTC Go to previous messageGo to next message
avatar bradykineticcuriosities  is currently offline bradykineticcuriosities
Messages: 61
Registered: February 2012
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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.
index.php?t=getfile&id=16367&private=0

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.

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www.bradykineticcuriosities.com A good head and a good heart are always a formidable combination.
Re: Pendant w/ Thread - Need Help [message #47509 is a reply to message #47488 ] Thu, 26 April 2012 06:13 UTC Go to previous messageGo to next message
avatar 6516440  is currently offline 6516440
Messages: 2
Registered: April 2012
Go to all my models
Junior 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.

[Updated on: Thu, 26 April 2012 06:14 UTC]

Re: Pendant w/ Thread - Need Help [message #47526 is a reply to message #47509 ] Thu, 26 April 2012 11:17 UTC Go to previous message
avatar bradykineticcuriosities  is currently offline bradykineticcuriosities
Messages: 61
Registered: February 2012
Go to my shop
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!


www.bradykineticcuriosities.com A good head and a good heart are always a formidable combination.

 
   
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