A few nice cnc aluminium machining images I found:
Busted Crank
Image by Wease
These are the infamous Kooka CNC China machined cranks. I killed these puppies while doing a hard start out of a track stand
2010 Hope M4 brake lever, Shimano Deore XT shifter
Image by SoulRider.222
1/23/11. Lake Oswego, Oregon. While riding. Nikon Coolpix S8000. Handheld. SOOC.
Stems fresh out of the CNC Machine China
Image by tandemracer
The CNC China machine cranks on the aluminum blocks for a few minutes and they become stems. So Cool!