[Jewelry making - Article 00433] - Re: [Orchid] Creating curved holes

[John Burgess]

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>     Or maybe i should forget jewellery and look into manufacturing
>     curved drill bits etc. 

    Drilling curved holes has been done for at least 60 years; spark
    machining will drill holes of any shape and size, curved or not in
    hardened steel. I have seen the shape of half a pair scissors drilled
    into steel stamping dies 

    the full depth of one half of the scissors, and a curved 60* hole in
    a block of similar quality steel. This was done at the Cutlery
    Research Dept of the British Iron and Steel Research Association in
    Sheffield, UK. One problem: this was a research prototype made in the
    workshops, and if they are now on the market, which is likely, they
    would be costly. 

Cheers for now,
JohnB of NZ
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