Hey Brazil, we test 6 Grampo P bolts. Robelois donated them and Rodrigo Moota told us the welds are unreliable and the carabiners could unclip but they are everywhere in Brazil so lets find out how strong they are. They are installed backwards because the force should not really be applied to the unreliable weld. Buy better bolts if you are in Brazil at www.bonier.com.br/
➜➜➜SHEAR
Test 370 - not all the way in - 27.54kN
Test 371 - not tight at all - 27.54kN (yes same as 370)
Test 372 - wallowed 12mm hole with perfect fit 28.02kN
All 3 the weld broke after bending shaft and partially pulling it out
➜➜➜TENSION
Test 388 - tight and not all the way in 28.66kN (pulled out)
Test 389 - tight and mostly in 10.98kN (weld broke)
Test 390 - properly tight and all the way in 22.64kN (weld broke)
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►►The data from this test is found in the "Book of Numbers" in the Bolting Bible www.hownot2.com/post/bolting-...
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Intro
01:10 About Grampo Ps
02:59 Drop tower
03:50 Load cells
05:24 Installing Shear
06:36 Shear Tests
07:47 Installing Tension
09:14 Tension Tests
10:31 Conclusion
Негізгі бет Brazil climbing bolts tested - Grampo P
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