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Re: how thin is too thin?
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Originally Posted by Joe Johnson
The general rule of thumb I try to follow if I can is to have at least a tooth thickness below the root diameter and 1.5 of that number if I can get it.
In this case the tooth thickness is 1/(2XDP) = 1/64 = .064" You look like you are only at about 1/2 of what I WANT to see. But... ... anyone who's read the NBD paper knows that I give up my rule of thumb when pressed.
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1/64" ~= 0.0156" and 3/2 x 1/64 ~= 0.0234" so by your rule-of-thumb sanddrag has enough thickness (0.028") below the root diameter above the keyway.
Still it seems thin to me. I would not want to shock load it.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
 since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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