Originally Posted By: willbur
It's not just about ultimate strength. The cheap tools get their strength using alot of cheap steel. This adds bulk and hinders access to tight places.The better/expensive tools use the strongest steel, are slimmer, and get into those places. Just saying...
Makes no difference, they are all limited to the same size, I am only taking into account a solid square cross section. 1/2" x 1/2" which is the 1/2" drive.
Originally Posted By: Vikas
So? You are saying that they have 10X error? Frankly, I *think* your calculations are suspect! Because if you are right, all the ratchets would have been broken before hitting 90 ft-lb!
I love the math and science but this is not cutting it.
Yep! I think their setup is suspect, the results comparatively should be ok but at the error they have who knows?
Not sure where you got 90ft/lb I get 41,000 psi which is under the Ultimate strength of A36, which is one of the cheapest forms of steel, these tools are probably using something a little better.
for the top end of A36, 80,000psi ultimate strength figure for A36 I get 173 Ft/lb