Quote:
Originally Posted by DELurker
Coming back to the original post...
Remember that steel is as strong as aluminum per pound. To accomplish the same task will require the same weight of either metal.
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Not true. Aluminum (as a generalization for FRC, you can find exceptions) has a significantly higher strength to weight than steel. In fact, for shafts/gears, your 7075 aluminum is both lighter and stronger that the common stainless steels places like andymark use. In terms of ultimate yield strength, aluminum is roughly 1/3 the weight and almost twice as strong.