Benchmade 741 snapped @ thumb hole

Hahahaha I got a shirt from the last armorer's course I went to. On the back in big letters it says "I got it this way......."

Of course, no one wants to own up to doing something stupid. I know the onslaught is not a pry bar like some folders, but that is ridiculous.
 
Folders..... the most expensive pry-bars you will ever own.


3mm of hard, WEAR RESISTANT steel with a flat grind, even without the hole it would be quite obvious that the weakest point is where the flat grind meets the full thickness of the stock. His method of correcting center issues was his own un-educated fault.

Maybe not the best example but when our hocky mask friend stands on a blade where do they usually break?
 
knifenut1013 said:
Folders..... the most expensive pry-bars you will ever own.


3mm of hard, WEAR RESISTANT steel with a flat grind, even without the hole it would be quite obvious that the weakest point is where the flat grind meets the full thickness of the stock. His method of correcting center issues was his own un-educated fault.

Maybe not the best example but when our hocky mask friend stands on a blade where do they usually break?
Click to expand...

Should i take that to mean hole or no hole? :D
 
Volk said:
regular spring (sorry this is my technical shortcoming, I don't know what they are called, the springs in a form of a tube) to a spiral spring which the knife has (sorry once again I don't know the technical term for a spring that reminds a snail shell, coil spring?)
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Thanks for the translation Volk! You filled in the gaps of Chrome/Google's translator.

Regular spring in form of tube = Coil or Helical spring

The snail shell/coil spring is called an Omega spring. This might be a Benchmade-only term. I can't figure out what it's called in the real world.

Thanks again!
 
singularity35 said:
Yes, but doing what? and would a blade without a hole have survived the same treatment?
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Doubtful. The 741 is huge slicer and shouldn't be objected to lateral force.

In the case of the 741, the hole is going to be the failure point because it's the weakest point, but I don't think it's significantly weaker. A blade without a hole would probably fail as well.
 
I really do think that a hole makes a blade weaker but not significantly weaker than a blade of the same steel, dimensions, and geometry but without a hole. It is logical that less material means less strength but in the case of a spydie hole, I believe that the loss of strength of the blade is not significant in the way that the same blade but without the hole would survive forces that would induce failure in the blade with the spydie hole. Actual test results would be nice to see.
 
diversionmary said:
Thanks for the translation Volk! You filled in the gaps of Chrome/Google's translator.

Regular spring in form of tube = Coil or Helical spring

The snail shell/coil spring is called an Omega spring. This might be a Benchmade-only term. I can't figure out what it's called in the real world.

Thanks again!
Click to expand...

No problems, thanks for the spring clarification.
 
Dear Benchmade, nobody was more surprised than I when all of a sudden out of nowhere....................:eek:
 
Either there's a huge production flaw, or this guy's a thumb-wrestling world champion.
 
I own the Onslaught. Yes, it's thin, even at the thickest part. It's not as massive as the Rukus. But I am very sure you'd really have to abuse the knife to make it snap like that.
I don't believe the original story. I trust my 741 a lot more. ;)
 
philwar said:
I own the Onslaught. Yes, it's thin, even at the thickest part. It's not as massive as the Rukus. But I am very sure you'd really have to abuse the knife to make it snap like that.
I don't believe the original story. I trust my 741 a lot more. ;)
Click to expand...

You should believe
Because...
137037346.jpg

More photos http://photofile.ru/users/ramses/115024235/137037346/#mainImageLink
This happened when i try cut billet twig`s (with size like a finger)
BUT... Anyway i think that 741 is great slicer and very handy in EDC
Just want get normal heat hardening
 
singularity35 said:
I really do think that a hole makes a blade weaker but not significantly weaker than a blade of the same steel, dimensions, and geometry but without a hole. It is logical that less material means less strength but in the case of a spydie hole, I believe that the loss of strength of the blade is not significant in the way that the same blade but without the hole would survive forces that would induce failure in the blade with the spydie hole. Actual test results would be nice to see.
Click to expand...

Google "hole stress concentration factor" and read a bit.

The hole affects strength, period.

A blade without the hole will withstand more stress.

This is a case of "location, location, location". The use of a hole to open a knife blade is a design driver.

I also note the blade did not break at a grind line at the thickest part of the blade. That line is closer to the pivot.


As for breaking the blade using the strength of ones hands, I can see it. But then I have seen people close 210lb Baraban handgrippers.
 
Ratamahata said:
You should believe
Because...


This happened when i try cut billet twig`s (with size like a finger)
BUT... Anyway i think that 741 is great slicer and very handy in EDC
Just want get normal heat hardening
Click to expand...

What did you do, cut in and twist?
 
Wow, I thought my 741 would be great at de-limbing light pine boughs using the pistol grip.
 
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