Post date: Jan 27, 2012 10:51:28 AM
I've uploaded two designs of pin joints in the CAD link. I know we were talking about using square aluminum tubing, but using solid aluminum might be easier to machine for two reasons
1.) If we just use a wider piece of aluminum, we can machine the yoke and "bone" into one piece, instead of having to deal with attaching/buying a separate yoke.
2.) Counterboring a solid piece of aluminum ensures that the bearings stay in place. Then again, we can always just use flange bearings, insert spacers between the bearings, or just use one wide bearing. This can be worked around. Issue number 1 is more important, in terms of simplicity, number of parts, and cost (no need to purchase $80 steel yokes if we don't need the weight).