Embroidery Thread Bobbin
thingiverse
My wife asked if I could print her a bunch of bobbins for her emroidery thread (she has about 200 colors from some giant batch she ordered online). She gave me a bobbin to use as a template. Five minutes with a digital caliper and TinkerCAD, and here we are. I recommend 100% infill as it is only 1mm thick -- I doubt you could convince your slicer to use less filament if you tried to print at a lower infill anyway. By measurement, this is a perfect match to whatever brand bobbin my wife handed me. Best of luck!
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