Well, I got bored doing production in my little shop, so I decided its time for a little fun
For starters, I have acquired two chunks of 303 Stainless! They are 5" dia and 3 1/4" long! So I setup my little horizontal band saw, and cut the bar stock into cubes around 3 1/8 x 3 1/8 x 3 1/8. Then I used my face mill to rough them down to around 3.010" cubed. Lastly, I put new carbide inserts into my face mill, and took one final pass on all six sides leaving a nice smooth, flat, parallel, perpendicular, and square cube! Then I drilled a 1/2" hole to the center o the cubes from all six sides.
Widgit