Quote:
Originally Posted by alchemy
If the myth that an unsupported cast iron crank will bend due to prolonged exposure to gravity is true, do you really think some lightweight wood will keep the cast iron from bending? Wood's density is WAY less than cast iron, and even cast iron can't hold up to gravity. The wood will probably be pulverized.
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Yes, I do. Density and compressive strength are different things. A flathead crank weighs 70 lbs. The main beating journals are 2.5" diameter and although I don't have one to measure, are about 1.5" wide for front and center with the larger rear around 2". This gives me a collective bearing area of 12.5 sq in. Divide 12.5 by 70#= 5.6 psi. Douglas fir has a compressive strength 7,239 psi parallel to the grain. It's not even close to being " pulverized".