Evan’s Ramblings has posted about machining a yarn winder out of steel.
A lot of the folks reading this might not know much about yarn winders. It’s easy to figure out what they do based on the name, but they’re actually a bit more complicated than you might expect. When I saw my first yarn winder, I didn’t get why it looked the way it did.
You can … take large balls of yarn and split them up into smaller, more manageable balls, which is useful for knitting or crocheting projects with many different colors. A yarn winder is also essential when you have fancy yarn that comes on unwound “hanks,” since using an unwound hank is very, very frustrating.