Ống suốt (Bobbin) Brother cho máy may LS14S

I measured a bobbin included with Brother LS14S and made a print compatible version from scratch. 

If you want to use it with your other machine, this bobbin is 20.5 mm x 11.0 mm with 8.70 mm outer diameter shaft and 6.50 mm hole.

You print in two halves and they slide together to create the full bobbin. One of the halves has curved edges so it keeps the thread away from potentially coarser 3D-printed surfaces (the OG bobbin has similar structure.

You should print at 0.1mm layer height or less for the shafts (or full object) otherwise they will be less smooth to slide into each other (0.2 mm means bumpier layers). The part tolerance is 0.1 mm radially for the shaft (0.2 mm total).

Regardless of the fit, I use a dot of CA (super) glue on the shaft and then hold it pressed tight until it sets.

Needless to say, this is a tiny object so calibrate your flow & retractions for best results. :)

You may want to try for a glassy transparent material if you prefer to see thread level or colour during use.