How do they do this? Any idea?

[NavMicroSystems]

OK Darrel; here's neat little project for you....;o)

Darrel,
you should start with a machine for Toroids, that's the challenge!

Simple coils can be wound on mothers sewing-machine
all you need is a counter for the turns.

;-)

[Melanie]

We have one of those... there is a large split ring which fits through the toroid core and closes to form a continuous concentric loop. The wire is then spooled onto this ring, anchor one end, and it is then despooled onto the torroid core whilst the core is rotated.

Air-rifle pellets are so cheap, you'd wonder why anyone would want to bother making them. Wouldn't it be cheaper just to import them from Russia? If you're only in Turkey, the freight costs would be minimal... and they sure need the currency, so you could strike a real deal.