Tuner’s Cube. I made it for my dad for Christmas 2010. Aaron helped me over Thanksgiving break to figure out the details and did some machining on it too. It started out as a ~3.5″x3.5″ solid square piece of aluminum.

We made a jig to hold it so it could be removed and place back in again at the same position but on a different edge.

The rotary table on the mill was used to turn it out:

Second half of the jig — this was Aaron’s idea, and it worked great. Just use a piece of mild steel with a hold cut into it and clamp it down on top.

Lots of chips:

Next in mill

Video: Wedding Ring from Steel and Pennies!