Anemometer made for an M8 bearing to minimise friction, the bearing fits inside the support.stl file. Note a modified version can now be found at http://www.thingiverse.com/thing:338464

The centre goes through and rests on top of the bearing, providing an anemometer that responds to minimum wind speeds. The wind cups (remixed from the Coffee Cup Scoop on Thingiverse) slot into the central hub. Created in SketchUp.

The wind cups were printed individually with the other components printed as a group, attached here as the .thing file.

Printed using the medium settings with raft but no support, stl's may need rotating to sit flat on the print bed if downloaded individually...