Thread spool end winder

thingiverse

Here's a holder to secure loose thread ends on a spool. This device fits snugly over 17 mm OD cores and can be easily adjusted for an even tighter fit by increasing its size by 1-2%. It also scales up well to accommodate larger core sizes. Be cautious when winding the thread, as it may get caught in the winding section. However, a significant advantage of this design is that it remains securely on the spool regardless of whether your machine holds it vertically or horizontally perpendicular to the thread feed.