The Busse BLOCK Lock Is The Strongest Folding Knife Lock Mechanism In The World? ? ? . . . Check It Out ! ! !

I sent Jerry 4 videos of knives well under $1000 (more like $200), and 3 of them handled well more than 540lbs, so the claim that the next closest contender is $1000 and failed at 540lbs is very disappointing.

I don’t doubt the claims about the block lock, but c’mon, give the competition proper credit.
 
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Jerry Busse said:
The Busse BLOCK Lock Is The Strongest Folding Knife Lock Mechanism In The World ? ? ? . . . Check It Out ! ! !
The next strongest folding knife lock mechanism that we could find from any other maker on the internet, held a truly impressive 540 lbs. at 4 inches from the pivot!

We used the specs of the other maker's knife that held 540 lbs and built one of our GT models to be as close as possible to the same size for a fair comparison.
Ours is, however, made with a much thinner blade, and we call it the GT40 Magnum.

The Busse GT40 Magnum, held 1,260 lbs. at 4 inches from the pivot. (That's 720 lbs. more than the other maker's lock)

The Busse Block Lock GT40 suffered no lock failure or breakage and was fully functional after the test with secure lock-up and NO Blade play.

Let's Drink! 👍

Jerry 😁


Here Are Comparative Specs Of The 2 Knives Tested:

Busse Block Lock GT40 Magnum
Blade Steel: INFI
Blade Length: 4.0
Blade Thickness: .180"
Handle Length: 5.6"
Overall Length: 9.6"
Handle Material: Titanium
Approx. Weight: 10.8 Ounces
Made In The USA
Price: $???.??
Weight Held at exactly 4" from the pivot = 1,260 lbs.

The Other Maker's Lock Test Knife
Blade Steel - CPM 3V
Blade Length: 4.0
Blade Thickness: .250"
Handle Length: 5.5"
Overall Length: 9.5"
Handle Material: Titanium
Weight: 10.5 Ounces
Made In The USA
Price: $1,000.00
Weight Held at exactly 4" from the center of the pivot = 540 lbs.

Important testing criteria to note:
- We use a digital scale for more precise accuracy
- Weight must be hung from the handle at exactly 4 inches (No less. . . No More) . . . from the center of the pivot.
- Knives must be shown opening and closing in the fixture holding the blade, prior to and after applying the weight.
- Tests that don't meet this criteria will not be considered for comparison.

PICS!

Pic below shows the weight plate raised approx. 2 inches above the pallet.
View attachment 3200184

Pic Below = GT40 Magnum
View attachment 3200183

Pic below shows the GT40 in a vertical position.
View attachment 3200182
Click to expand...

This test, is wrong but results are impressive.

Because you are testing the lock you need to isolate the lock from the rest of the knife.

If the blade or the handle snaps than it's not a lock, it's the blade or the handle. I understand that with the design handle and blade became part of the lock, but unless the failure comes at the locking mechanism than technically the lock is stronger than the available materials.

Second. Because of the way experiment is set up, the weight is not on the lock but actually on extended lever (the handle length). So the actual weight applied to the lock is much greater than 1260.

We can actually do the math, with dimensions provided the numbers would be pretty scary...
 
jlauffer said:
I sent Jerry 4 videos of knives well under $1000 (more like $200), and 3 of them handled well more than 540lbs, so the claim that the next closest contender is $1000 and failed at 540lbs is very disappointing.

I don’t doubt the claims about the block lock, but c’mon, give the competition proper credit.
Click to expand...

Problem is it is possible that the way experiment is set up (see above) those knives would actually fail before their claimed failing point. Because more force is applied.
 
Volk said:
This test, is wrong but results are impressive.

Because you are testing the lock you need to isolate the lock from the rest of the knife.

If the blade or the handle snaps than it's not a lock, it's the blade or the handle. I understand that with the design handle and blade became part of the lock, but unless the failure comes at the locking mechanism than technically the lock is stronger than the available materials.

Second. Because of the way experiment is set up, the weight is not on the lock but actually on extended lever (the handle length). So the actual weight applied to the lock is much greater than 1260.

We can actually do the math, with dimensions provided the numbers would be pretty scary...
Click to expand...
Fair points, but not of any real consequence. For the first point, the flame and blade are not likely to snap before the lock, if they do then fair, a rethink is necessary but its a very long shot and Im pretty certain it wont happen.

As for the second point, all that matters is hat the length of the lever is the same, then the force will be the same. Whether its the weight of the plates or a multiple is not material.

But fair points either way.
 
Volk said:
Problem is it is possible that the way experiment is set up (see above) those knives would actually fail before their claimed failing point. Because more force is applied.
Click to expand...
Now this is where the lever length comes into play, do we know how the weight was applied to these knives jlauffer mentioned?
 
DamascusBowie said:
Fair points, but not of any real consequence. For the first point, the flame and blade are not likely to snap before the lock, if they do then fair, a rethink is necessary but its a very long shot and Im pretty certain it wont happen.

As for the second point, all that matters is hat the length of the lever is the same, then the force will be the same. Whether its the weight of the plates or a multiple is not material.

But fair points either way.
Click to expand...

Yes, I agree. Its hard to determine where everything is attached on blade side length wise.

In the very end with this lock design, this experiment is at best test of the knife rather than the lock. And then it comes down to tensile strength of the weakest component.

Sincerely yours
Guy who flunked math in high school and been doing his best to avoid doing math ever since.
 
Jack of All Blades said:
The 5max was the one that hit 1400 lbs.
Atlas mayhem failed at 1750lbs

Those were also through steel liners and g10 not full titanium slabs.

I like that they’re innovating to create a very strong lock but the claim that it’s absolutely the strongest mechanism in the world is a bit of a stretch.
Click to expand...

hugofeynman said:
You're absolutely right on the numbers. I didn't mention it because those numbers weren't obtained using real weights, like Andrew Demko and Cold Steel used to do, just a device that simulate weights. Is that device accurate? I'm sure it is, because those Cold Steel monsters are super strong. For most people, a device that simulates weights and using real weights isn't the same thing.😅
Click to expand...

Jerry Busse said:
Looks like we have to take our folder to its breaking point.

Let's Drink!

Jerry

.
Click to expand...


The question isnt just weight. How far from the pivot was the weight on the cs knives put? For example 1260lbs at 4 inches would be equivalent to 2520 lbs at 2 inches. Anyone know where cs measured from. Is there a video. I know cs likes making videos. So there should be something.
 
Cobalt said:
The question isnt just weight. How far from the pivot was the weight on the cs knives put? For example 1260lbs at 4 inches would be equivalent to 2520 lbs at 2 inches. Anyone know where cs measured from. Is there a video. I know cs likes making videos. So there should be something.
Click to expand...
4 inches away from the pivot was standard in their testing.
 
Cobalt said:
The question isnt just weight. How far from the pivot was the weight on the cs knives put? For example 1260lbs at 4 inches would be equivalent to 2520 lbs at 2 inches. Anyone know where cs measured from. Is there a video. I know cs likes making videos. So there should be something.
Click to expand...

It's even more than that, see Just above
 
Volk said:
Yes, I agree. Its hard to determine where everything is attached on blade side length wise.

In the very end with this lock design, this experiment is at best test of the knife rather than the lock. And then it comes down to tensile strength of the weakest component.

Sincerely yours
Guy who flunked math in high school and been doing his best to avoid doing math ever since.
Click to expand...
Hey you calculated the actual pressure at 4 inches, I gave up on that challenge and thought "good enough" :cool: 😂
 
DamascusBowie said:
Hey you calculated the actual pressure at 4 inches, I gave up on that challenge and thought "good enough" :cool: 😂
Click to expand...

Yeah and he is right. The busse knife blade is being held at looks like an inch from the pivot on the blade. And the weight is 4 inches past the pivot. So the torque on the blade itself where its held is 6300 inch lbs. Which is 525 ft lbs. By comparison a semi trucks lugs have to be torqued at 460 to 550 ft lbs. I think. Not sure. My memory fails usually. And the blade held. Pretty impressive. I still think the pivot is the weak link. More so than the blade in these knives.
 
I sent Jerry the video on the Demko Shark Lock test. 540lbs is what it held. They tried, without stepping up, to 585, & it failed. Failed right, but failed. So between 540 & 585 is its hold weight.
I have a Nano with this lock, my 1st Demko, it seems pretty close to the Block lock except the release is on the spine, & I think it's a bar lock. Great little knife.

You can find the vid by searching "Demko" & "500 pound test" on YT. 🙂
 
Jaxx said:
I sent Jerry the video on the Demko Shark Lock test. 540lbs is what it held. They tried, without stepping up, to 585, & it failed. Failed right, but failed. So between 540 & 585 is its hold weight.
I have a Nano with this lock, my 1st Demko, it seems pretty close to the Block lock except the release is on the spine, & I think it's a bar lock. Great little knife.

You can find the vid by searching "Demko" & "500 pound test" on YT. 🙂
Click to expand...

At 4 inches. Which is what jerry used.
 
Cobalt said:
Yeah and he is right. The busse knife blade is being held at looks like an inch from the pivot on the blade. And the weight is 4 inches past the pivot. So the torque on the blade itself where its held is 6300 inch lbs. Which is 525 ft lbs. By comparison a semi trucks lugs have to be torqued at 460 to 550 ft lbs. I think. Not sure. My memory fails usually. And the blade held. Pretty impressive. I still think the pivot is the weak link. More so than the blade in these knives.
Click to expand...
It doesn’t matter whatsoever where the blade is being held. It’s fixed. All that matters is the distance from the pivot to the point of weight application.

ETA - So the torque is 5,040 in-lb at the pivot, to be clear.

ETA2 - And I’m not going to bother doing the shear load calcs for the blade. A 1/8” by ~1” heat treated INFI blade is more than sufficient to hold the load as-mounted. Flip it 90º and that certainly changes.
 
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SpyderPhreak said:
It doesn’t matter whatsoever where the blade is being held. It’s fixed. All that matters is the distance from the pivot to the point of weight application.

ETA - So the torque is 5,040 in-lb at the pivot, to be clear.
Click to expand...
I was talking of torque on the blade itself. But u are correct about the torque on the pivot. I thought I was clear about that, but maybe not.
 
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