And woe unto anyone who guesses wrong on how much wire the job will take. To solve those problems, [Sandeep] came up with this clever and effective toroid winder. The idea is to pass a small spool ...

There’s the main rotary axis, and a wire-guide that moves along it ensuring the coils are wrapped tightly without gaps. It’s an impressive build and you can tell he’s put a lot of thought ...

Check Winder Specifications Ensure the winder supports your watches’ TPD and rotation requirements. Most luxury watches need 650–1200 TPD, but check your watch’s manual for specifics.