American Locomotive
Well-known member
Don't get me wrong - I rag on Torque Test Channel all the time, especially on their impact comparisons and how they try to extrapolate torque values. That's why I appreciated in this video that he just reported the PSI achieved on his test rig. Even then it could still be improved by a load cell directly measuring the applied torque.
I'm super critical of their methods, and I could find very little wrong with this test. Like I said earlier, this is a really great test of open end wrench geometry. Poorly designed (or traditional) wrenches concentrate a lot of stress on the corners of fasteners. It doesn't matter if the bolt is made out chocolate or steel. If the wrench can distribute its force more on the flats, than the corners, it's going to work better on ALL fasteners.
This isn't a test of ultimate wrench strength. The very worst of the wrenches here did experience spreading of the open ends, which the soft nut helped to mitigate. That's more of a metallurgy thing, than a geometry thing (unless the wrench had a ridiculously thin cross section for whatever reason). But shooting an XRF gun at the wrench isn't going to tell you much besides what alloy it is. Things like hardening, heat treatment, cryo treatment (if applicable) and even the forging process itself all contribute tremendously to the strength of a wrench.
I'm super critical of their methods, and I could find very little wrong with this test. Like I said earlier, this is a really great test of open end wrench geometry. Poorly designed (or traditional) wrenches concentrate a lot of stress on the corners of fasteners. It doesn't matter if the bolt is made out chocolate or steel. If the wrench can distribute its force more on the flats, than the corners, it's going to work better on ALL fasteners.
This isn't a test of ultimate wrench strength. The very worst of the wrenches here did experience spreading of the open ends, which the soft nut helped to mitigate. That's more of a metallurgy thing, than a geometry thing (unless the wrench had a ridiculously thin cross section for whatever reason). But shooting an XRF gun at the wrench isn't going to tell you much besides what alloy it is. Things like hardening, heat treatment, cryo treatment (if applicable) and even the forging process itself all contribute tremendously to the strength of a wrench.