RMax's head, shoulders and upper right arm. The right upper arm
is a Shimano XTR
quick-release front bike hub. The elbow u-joint will be
attached to the end of the bike hub.
It will attach onto the central spinning part so that it transmits
the spin of the hub down the arm.
The Multiplex jumbo hubs seem to have enough torque to move the upper
arm with ease.
We'll see how they fare when the rest of the arm is attached.
The left arm has a heavy-duty
Phil Wood hub attached as the upper arm. This will change to
a lighter-weight hub like the
right arm. So far the design of the right arm is mechanically
simple with as few moving parts