Hi
For a very special work in the musical instrument area, I had the need of a very small boring bar.
I simply has the idea to reuse somewhat my D-bit design, which ended up working pretty well.
It's only 4 mm in diameter.
http://www.labellenote.fr/file/homem...g_bar_0001.jpg
http://www.labellenote.fr/file/homem...g_bar_0002.jpg
http://www.labellenote.fr/file/homem...g_bar_0003.jpg