Stepped ring mandrel (ID mm sizes) for wire wrap jewelry
by kRe, published
robmartin701 had the great idea of making a stepped ring mandrel - I was so happy to finally get an inexpensive version of this type of tools... well... but I live in Europe, we are measuring ring sizes differently.
So I made this version with inner diameter sizes (in millimeters).
If sizes 16mm to 21mm are not what you need: I tried to make this thing parametric
Will add pictures of the printed thing later...
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Print it with a well-calibrated 3D printer, otherwise the ring sizes will be off.