I need to buy or fabricate a strong crankshaft for a strandbeest-like glass robot.
I'm making a walking robot out of glass based on Theo Jansen's strandbeest leg design. Fabricating the crankshaft has proven an odious challenge. I'm looking for a source where I can buy either a complete crankshaft to my specs or parts from which to fabricate my own. It needs to be about 30" long, with 6 crank arms (offset 120°, therefore 2 at each angle), throw on the crank to be 1". My original design was for a 1/2" diameter shaft, which is necessary if it's going to be glass, but if metal the shaft diameter could probably be smaller. The video here shows the crankshaft I made, but I don't really trust it.http://instagram.com/p/x8xcPeyn-1/?modal=true
The prototype leg: http://instagram.com/p/wewqr1yn6a/?modal=true