Bobbin (Customizable)

thingiverse

Bobbin design originally tailored for classic Elna sewing machines but capable of customization to suit any sewing machine. Our Elna machine came with one metal bobbin measuring approximately 21 x 11 mm. This standard bobbin size is slightly larger at 20.1 x 10.8 mm, although it can be adjusted using OpenSCAD or the Customizer (if functioning properly). I advise utilizing this smaller size in a vintage 1970s Elna machine as the plastic threads are less slippery than metal. This two-part design provides a snug fit and can be challenging to disassemble once assembled. To ensure secure bonding, I recommend applying a small amount of super glue inside the larger piece before joining the two halves together. A moderate amount of force may be required, and precise alignment is necessary for successful assembly. After assembly, wipe the interior bore clean to remove any excess glue, taking care not to allow it to seep into the tiny empty space within the bobbin.