[Jewelry making - Article 00427] - Re: [Orchid] Harbor freight's dapping set

[brainnet]

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>     the block has 18 holes, and there are no punches that fit the 3
>     largest holes in the block (which are, of course, the ones I
>     wanted to use the most). 25 minus 18 = 7 and, since I've already
>     identified 3 holes for which there are no punches, 

    There is a misconception that dapping tools should fit the domed
    depression in the block. My experience is that one almost never uses
    a punch that is close fit to the depression. Instead a punch is used
    that is one third to one half the size of the hole. The center of the
    disc is punched down hard and fast towards the bottom of the hole,
    then the punch is used to 'stroke' the metal against the sides of the
    hole, beginning at the bottom and moving up the sides. It is like
    stretching a canvas, where you do opposite sides in turn until you
    have done the whole thing. Think of it like pushing pastry into a pie
    plate with your hands, stretching it into the shape. Usually there is
    not a perfect progression from hole to hole, and to put a partially
    domed disc into a hole that is just too small for it tip the disc up
    up, almost sideways, and tap with the (1/2 size or so) dapping tool
    while turning the domed disc, and it will shrink until it fits into
    the hole, then when it fits, strike the center again and repeat the
    stretching..... 

best
Charles
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