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Thread: Stone tension setting help

  1. #1
    Join Date
    Oct 2009
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    UK
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    Default Stone tension setting help

    Hello there,
    I want to give tension setting a go and I've found a nice project to follow that at least *looks* do-able. However, it says to use a Hart bur 3.5mm (45 degree), and I've searched for this on the Cookson site but can't find anything that matches. I've googled it and got some US matches but I've not found anything to order from the UK. The gemstone will just be a test-friendly CZ 3.5 faceted round stone. Can anyone suggest a cookson bur that would do the job? ...and any other tension setting hints and tips would be great!
    Many thanks.
    scooch.

  2. #2
    Join Date
    Dec 2009
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    Central London
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    7,791

    Default Tension setting

    Cookson's Bearing Cutter Bush No 414 will do the trick if you choose the appropriate size for your stone. But remember it really does mean tension.The metal must be hard and thick enough not to distort in use, or the stone will drop out. People I know who do tension set rings use stainless steel with diamonds. Sorry to be such a pessimist. Dennis.

  3. #3
    Join Date
    Aug 2009
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    Default

    Just to say, though, that I finished making one last night - a round aquamarine set in silver wire. The most important thing is obviously getting the tension right. That little stone isn't going anywhere, it worked really well. Good luck!

  4. #4
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    Aug 2009
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    Birmingham, UK
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    Default

    I've just completed a 0.52 ct tension setting commission - it worked out rather well but was a devil to spring open being 3mm wall thickness in Titanium

    Click image for larger version. 

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  5. #5
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    Default

    Quote Originally Posted by geti-titanium View Post
    I've just completed a 0.52 ct tension setting commission - it worked out rather well but was a devil to spring open being 3mm wall thickness in Titanium

    Click image for larger version. 

Name:	tension2.jpg 
Views:	46 
Size:	47.8 KB 
ID:	1016
    Oh that ring..... would look good on my finger I reckon!

  6. #6
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    Quote Originally Posted by lynnm View Post
    Oh that ring..... would look good on my finger I reckon!
    Is that a proposal lynn?

  7. #7
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    Default

    for that ring? why not!

  8. #8
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    Quote Originally Posted by lynnm View Post
    for that ring? why not!
    Damn! too late! The customer picked it up yesterday otherwise we could be honeymooning in Hawaii by now

  9. #9
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    Quote Originally Posted by geti-titanium View Post
    Damn! too late! The customer picked it up yesterday otherwise we could be honeymooning in Hawaii by now
    well I didn't ask hubby if he minded either... plus I don't have a passport.... oh well I shall have to up my anti and learn to make my own I guess!

  10. #10
    Join Date
    Aug 2009
    Posts
    68

    Default

    *Quietly hides her plain silver band and 5mm aquamarine ring in the corner.*

    Good grief that ring is GORGEOUS!

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