From our archives: Basic bead setting irst the stones diameter is measured at the pavillion and a dent is made in the metal for the pilot drill (about 1mm diameter). Then the metal is drilled through. The metal is drilled again until the hole is about 3/4 the size of the stones diameter. Lubricate the drill bit. As long as there is a 0.3 mm seat left there is enough to set with. It is an easy mistake not to take out enough metal, 3/4 of the diameter of the stone is probably a bigger final drill bit than you think. Hold it on top of the stone to see how much stone sticks out on each side of the bit.....
Posted on: Thu, 08 May 2014 02:12:36 +0000
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