Toor Knives Tropical Thunder Valor CPM-3V Broke in China.

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A friend of mine is a knife reviewer in china, he tested a knife in topic recently and it broke.
Three days ago, I sent this to Toor Knives on their contact us page. They haven’t responded.
My friend in China who is a knife reviewer broke one of your knives during testing and it was the first time a knife he ever broke. It was broken in the specific step, in which he steps on the knife, he does this to every knife he tests and no other one broke.
The model is a limited edition Tropical Thunder Valor , CPM-3V version.
He considers this a premature failure since it is 5 millimeter thick of CPM-3V and asked me to help him contact you guys for explanation and warranty claim. He might contact you himself later.
He has posted a video on a popular video platform, here is a link to it, you may see the tesing and decide if it falls within your warranty. The knife was tested new-in-box and was not modified.

实操测评史上第一把断刀出现了！-Toor Tropic Thunder Valor户外实操测评_哔哩哔哩_bilibili

Toor Tropic Thunder Valor刃材：CPM-3V硬度：59-61HRC柄材：G10总长：28cm刃长：13.5cm切割线长：14.2cm刃柄比：1.074：1刃宽：3.2cm刃厚：0.49cm净重：264g含鞘重：324g, 视频播放量 33636、弹幕量 219、点赞数 1824、投硬币枚数 1366、收藏人数 300、转发人数 67, 视频作者 草蟀测评, 作者简介 国内外名刀实操测评 刀无贵贱 只分好坏 一把好刀 钢材是骨架 设计是血肉 热处理是灵魂 三者缺一不可，相关视频：TOOR KNIVES，不到两张的洋牌子刀！...
b23.tv b23.tv
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The link leads to his video.
Here are some screenshots from the video.
IMG-3591.jpg


IMG-3593.jpg

IMG-3594.jpg

IMG-3592.jpg


IMG-3596.jpg
 
That knife looks like Sabre ground 3/16 stock. I would have assumed it would have taken a bend. But I don't know the context of the test. Did it already have damage, that propagated a crack.
 
Does Toor advertise that knife as being able to survive such abuse?

I don't see how laying a knife across two logs and stepping on it until it breaks constitutes any kind of "test". In what conceivable real-world situation would a person do such a thing with a knife.

Contacting Toor to tell them their knife failed such a "test" is like pushing a car off a cliff and then contacting the maker to tell them their cars are unsafe.

Looks like China has their own version of Joe X.
 
Guys, I think your opinions are reasonable. He does step on knives often, but I just checked, he rarely stomps on knives.
It could be that stomping is simply much harder on the knife than standing on the knife since it is dynamic.
I have sent him a meassage, asking him to try stomping on some more knives so it can be compared.
If most knives of similar design breaks, it would indicate that stomping is simply too harsh.
 
Cobalt said:
That knife looks like Sabre ground 3/16 stock. I would have assumed it would have taken a bend. But I don't know the context of the test. Did it already have damage, that propagated a crack.
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It was not damaged prior to the stomping, his tests are mostly rather mild outdoor use until the tip and blade integrity tests.
 
David Mary said:
Rapid energy transfer vs. gradual application. One easily allows the material to deform and redistribute stress and one does not.
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Yes it is true.
Calculated Survival does a similar test which he hits the knife on the side with wood, many knives take damage.
 
I question why the reviewer would suddenly choose that moment to change the nature and intensity of his "step" test into a "stomp" test, and how he expected to gain meaningful data by doing so.
 
David Mary said:
I question why the reviewer would suddenly choose that moment to change the nature and intensity of his "step" test into a "stomp" test, and how he expected to gain meaningful data by doing so.
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It was mianly impromptu. He also stomped on a Kiku Matsuda knife in a recent test, but he didn’t do that to many other knives.
I agree, many reviews are more like TV shows than research, prioritizing entertainment over science.
Though not entirely worthless, they certainly are anecdotal information not valid evidences.
 
The broken pieces remain straight hence fractured in elastic range, where elastic/spring flexing blade shouldn't failed like that. Look like fractured was initiated at 1st/front jimping grove, where stress/strain forces concentrate at 1st grove's since it is probably the inflection/mid of the 3 points bending test. W/o jimping, I think this blade would pass the elastic flex test... While, 3 points plasticity test probably best done in control/shop/lab setting
 
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