We just learned about Swarf.
Another part of metal machining is called Boring.
When a hole has been drilled into a piece of metal, sometimes you may want to make the hole bigger, or sometimes to make a tapered hole that starts small and opens up as it goes out.
The boring bar is put into the hole that was already drilled, and then it spins around and makes it bigger or tapered.
(from: wikipedia - boring (manufacturing))
Kid Facts - Blast from the past: Category 3 Hurricane
