Quote:
Originally posted by Mike Holt
For those of us that are of simpler minds what is shear (single or double) in layman's terms? I replaced mine with grade 8 but after reading Dave Smith's response and now this thread, am going to go back to grade 5. I'm just not up on the stresses and this shear term as it applies to this situation.
Thanks
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Mike,
I recommend that you visit
Making the Grade A Technical Discussion Grade 5 vs. Grade 8 Fasteners By David M. Potter.
You will find this article is quite easy to understand and dispels the myth of grade 8 bolts being "Brittle". It also shows a bolt in shear and tension loads.
Dave Smith's engineering guys have probably found that the stresses implied for their application do not require a grade 8 bolt. Therefore a grade 5 is adequate.
(If I were you, I would stick with the grade 8 units.)