Make717: Milling a Square or Hex on Round Stock

Fair warning: this post is to document a specific procedure for members of Make717. Regular subscribers don't need to feel guilty for skipping it!

MAKERS: the machine shop at Make717 has all you need to easily mill square or hexagonal shapes on round stock. This before-and-after photo shows what I mean:

Z-Axis Digital Readout - A Story in Pictures

See if you can create the narrative just by looking at the pictures!