My first Gear Head was created from an '50s air compressor, an aluminum dental training skull (?), Mt. bike gas shock and old chain drive gear. I really like how this turned out. Below, The proud new owner and humble artist.
And my latest, Gear Head 2.0, the result of having some fun with old Erector set parts. I incorporate bicycle brakes, slide door parts, gears/bearings & a vintage blender base. Currently on display at Arts and Crafts Cooperative Inc.(ACCI Gallery) in Berkeley, Ca.