Wow, thats alot of weight to take out of something that could be crashing into other robots. as far as for a manipulator.
Nice machining though, very nice piece.
I was led to believe that square or sharp corners (like the ones machined at the bottom of each triangle here, and like the ones cut into the bulkheads of the Liberty ships of WWII) were to be avoided because they could develop very high concentrations of stress and lead to failure. Why this design? Most other machining work you see here includes nice stress-reducing curves.
They are curved, it’s just hard to see. Check the next picture of them that was uploaded.