[Jewelry making - Article 00389] - Re: [Orchid] Tapping earring post

[Phillip]

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>     Off list I can give you the drill bit numbers for the taps you are
>     working with. For very thin stock, you will want to use 100% full
>     thread, whereas the above is for holes as deep as the diameter of
>     the tap. 

    That went over my head, sorry. I don't understand what the
    percentage scores relate to. 

    I only need one size of tap & die, which is for 0.8mm wire. For me I
    think a range from 0.5mm to 1mm would be usefull if I get the time
    to use them in a design. 

    I'll appologise in advance for a total memory block on the
    appropriate technical term - the few I know. 

    The depth of the cut on the die is important as much as the thread
    should be fairly deep. What is more important is how close the
    threads are spaced. It needs to be long. The main metals would be
    750 gold and plat, so I can get a lot of turn fast. The tapping side
    of things is simple enough. I only need to tap into a soft metal
    4mm's tops. 

    I imagine I would struggle with the smaller ones. I did in the past,
    but if I do one I will do a hundred, so I am sure I will sort out
    the right drill size pretty quick. 

    The tapping sets I see around are probably not made with jewellery
    metals in mind. The best sets are available. I know because you can
    buy earring posts with the threads just right. The problem is that
    the butterflys/scrols are often too expensive for what they are. They
    are easy to make and if you can make one by hand cheaper then you can
    personalise it at the same time. They come out nicely.
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