Lock Strength - Extrema Ratio Fulcrum II vs Cold Steel Pocket Bushman

Cold Steel Knives

Cold Steel Knives

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Extrema Ratio's website states that the Fulcrum II folding knife has "toughness comparable to a fixed blade" - how did it hold up in our shock and weight tests?

Watch the video HERE to find out!
 
That was a let down. Sure wanted to see how much weight the pocket bushman could handle.
 
Please continue doing these tests. I know you guys catch a lot of heat from people about not being fair, not being polite by testing other brands, etc, but I really enjoy watching these videos as I'm sure a lot of guys here do as well. Keep up the good work!

PS. Please test the code 4 and the Spyderco paramilitary 2! Not necessarily together, but at some point it'd be great to see how either knife does when subjected to this stress.
 
That is just amazing that the Bushman lock can completely "heal" itself after that punishment. :thumbup:
 
wow that's surprising. I thought ER with that 6mm thick blade and lock would have lasted better...
 
I wonder how the Tuff Lite would hold up compared to these fancy knives.

On the other hand the $50 Pocket Bushman versus the $380 Fulcrum II is a bit of a shocker too.
 
I'm sure it's been said in other threads but I would love to see this test on the Extrema Ratio RAO. That is the knife they truly market as the folding fixed blade.
 
Interesting video. It just goes to show that price does not mean strong, nor do gimmicky names.
 
When you look at how much that ER costs, then reconcile it against the 4 MAX, I dont see any comparison
 
How about the first test any knife goes through is against the Tuff Lite. If it beats the Tuff Lite then you can move on to bigger and better knives. If it fails then, well, in this particular form of testing that $400 knife is not as strong as Cold Steel's $20 utility knife.
 
Very very surprised...
I would've been sure the Fulcrum would've won, by FAR... There was a test online, ages ago, where somebody compared a Fulcrum folder to a Strider.. (AR, IIRC) I believe they used a hydraulic press to test the strength of the lock, and it came out far ahead of the numbers Cold Steel came up with, if memory serves. I'm just really surprised. Good on ye' Cold Steel!
 
ohmyheckinslc said:
Very very surprised...
I would've been sure the Fulcrum would've won, by FAR... There was a test online, ages ago, where somebody compared a Fulcrum folder to a Strider.. (AR, IIRC) I believe they used a hydraulic press to test the strength of the lock, and it came out far ahead of the numbers Cold Steel came up with, if memory serves. I'm just really surprised. Good on ye' Cold Steel!
Click to expand...

Hydraulic testing right at the pivot, vs further down the handle is huge. Leverage causes a force multiplier the further away from the pivot you you get.
 
ohmyheckinslc said:
Very very surprised...
I would've been sure the Fulcrum would've won, by FAR... There was a test online, ages ago, where somebody compared a Fulcrum folder to a Strider.. (AR, IIRC) I believe they used a hydraulic press to test the strength of the lock, and it came out far ahead of the numbers Cold Steel came up with, if memory serves. I'm just really surprised. Good on ye' Cold Steel!
Click to expand...

I believe that was in a some German publication. I remember not being able to read the words in the article.
 
ohmyheckinslc said:
Very very surprised...
I would've been sure the Fulcrum would've won, by FAR... There was a test online, ages ago, where somebody compared a Fulcrum folder to a Strider.. (AR, IIRC) I believe they used a hydraulic press to test the strength of the lock, and it came out far ahead of the numbers Cold Steel came up with, if memory serves. I'm just really surprised. Good on ye' Cold Steel!
Click to expand...

I believe this is the article you are referring to:
https://www.bluelinegear.com/about/faq/7#n-77

Like ursamajor mentioned, hydraulic press generated straight force/pressure(lb or lb/inch^2) to the pivot while CS's test generate Torque(inch.lb) which increases multiplicatively the as the distance between the load and the pivot increases.
 
That's the one. Thanks!
If measured as inch/pounds, pressure is pressure, force is force, I'm not sure that it matters, if the data is represented honestly. 70 Bar is over 1000 PSI, and the Strider did even better, I'd forgotten that. Either way, my surprise remains. :)
I wish Andrew had given us an up-close view of the Fulcrum so we could've seen the failure more clearly. These tests are so fascinating. Cold Steel is really putting their money where their mouth is...so to speak.


hkyew said:
I believe this is the article you are referring to:
https://www.bluelinegear.com/about/faq/7#n-77

Like ursamajor mentioned, hydraulic press generated straight force/pressure(lb or lb/inch^2) to the pivot while CS's test generate Torque(inch.lb) which increases multiplicatively the as the distance between the load and the pivot increases.
Click to expand...
 
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