Accidental Spine Whack--Share Your Anecdotes

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Aug 5, 2011
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As we see spine whacking and the myriad of opinions it brings up, time and again, I thought perhaps a thread detailing and cataloging actual experiences with accidental spine whack--resulting in lock failure and possible injury--in the course of use, might be, well, useful.

Obviously it won't be an exhaustive encyclopedia of spine whack/lock failure stories, but we have those who find it a stupid test and those who feel it is adequate if done lightly, to those who give it some good hard knocks before deeming the folder acceptable for use. I'm in the former camp, though serious users here who do it, do bring up some good points as to why, I respect that.

But how often does it really happen? Certainly, we could say that if a good lock avoids it happening even once, it's better than not. But it is mostly, for me, a solution to a nonexistent problem, exceptions notwithstanding.

I do appreciate the various locks on folders however.

Anyway, given the various debates raging over the test and how useful a knife is or isn't if it does not hold up to this, I thought sharing some actual experiences from users might be great.

I've experienced this long ago on cheap mall ninja stuff, but never since I "wised up," as it were.

ETA: I don't perform spine whack tests just to be clear. When I say I've never experienced such a failure I mean, by accidentally hitting the spine of the knife on something in the course of normal use. I've done this, but thankfully the lock held up each time.
 
No for the everyday Joe I don't get all the hullabaloo. A bigger problem is frame locks that stick open and you can't unlock it. Still that has almost never happened to me in actual use.

I suppose in combat (where you would probably be using a fixed blade anyway) maybe all the chaos and mayhem might see some spine whacks on the knife.

One of my favorite knives has a sweet and light lock that is quick and easy to use. The knife feels so good and the 440C steel is something I actually look forward to using. I don't think this knife will have any problems, ever, and it seems to be a light duty lock. Plenty for my uses.

The bottom knife

 
I was doing some work in a tight space and turned and hit the spine on the door frame. Didn't knock it out of my hands and the lock didn't let go either.
 
Haven't figured out how to spine whack while performing a knife task. But I have managed to do an edge whack on a Native 5. Cut a zip tie free, and blasted the edge against a cast exhaust down pipe.... The lock-back did great. The s35vn steel edge.... Not so well.
 
Like the poster 2 posts above, I was cutting in a tight space, through some stiff material that was grabby on the blade. Having to use some effort to remove the blade, I hit the blade spine on the confines of the space. The liner lock let go and the blade folded. Subsequent to this I did some research and testing. I found 1) people can be terribly unimaginable about how knives are actually used 2) there is a crazy amount of butt-hurt regarding the "spine whack test" 3) a light tap of the spine on my palm with this knife will cause the lock to fail. Since then, for me, it has been axis lock or nothing.
 
if you've ever had a knife (unknowingly) stuck in a piece of wood or other material, when you go to pull back on it... you are putting those types of forces on the blade and lock
 
Haven't figured out how to spine whack while performing a knife task. But I have managed to do an edge whack on a Native 5. Cut a zip tie free, and blasted the edge against a cast exhaust down pipe.... The lock-back did great. The s35vn steel edge.... Not so well.

This has happened to me as well. Usually it's an edge whack.
 
Bottom knife looks pretty cool actually, and I see it is drilled for left hand carry too, gets a :thumbup: from me!
 
Long story shorter I bumped the spine of my manix2 and it closed on my knuckle giving me a small cut and concern. So I smacked it lightly on the quite soft edge of my shoe sole and it closed again!!! After dismantled and cleaned I checked again and it was rock solid ,so it was something in the bearing lock but the knife was only a few weeks old then and has been much dirtier since then without an issue. I carry it almost everyday and I trust it now after I took it apart but I still don't know what went wrong.
 
I remember that some knife of mine got the spine bumped into something when I was cutting something somewhere, some time or other.
As nothing bad happened, that's as precise as my memory of it is. :)
 
Whenever I have to do this

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or cut some Parietaria or Hedera in the wall while hanging from the net at 20ft.

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I'd rather have the lock not fail on me when the back of the blade hits the rock or the metal net

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or the blade not fold trapping/hurting my fingers while trying to maneuver the knife in tight spaces

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Also, I have whacked the pivot of the gardening shears a few times with the spine of the Rajah II whenever they got hung up, specially after cutting very fibrous material or plants

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just my 2 cents
 
I was working in the ceiling space installing cables in between the roof trusses.Yup, smart rap on the spine and not just once.

Another time, I was up on a mango tree at my farm and trimming branches at almost full stretch. Again pretty smart raps on the spine when pulling a knife out of deep cuts.

And yes, in a possible self defense scenario, I'd prefer a knife that can handle a spine whack. Just because I may not be in such a scenario for my whole life doesn't mean it won't happen.
 
Excellent stories and pics! This seems precisely such a scenario where a strong lock that works is a good idea.

Do you have any fixed blades you use for these purposes?
 
I was working in the ceiling space installing cables in between the roof trusses.Yup, smart rap on the spine and not just once.

Another time, I was up on a mango tree at my farm and trimming branches at almost full stretch. Again pretty smart raps on the spine when pulling a knife out of deep cuts.

And yes, in a possible self defense scenario, I'd prefer a knife that can handle a spine whack. Just because I may not be in such a scenario for my whole life doesn't mean it won't happen.

Excellent stories, thanks. I don't usually consider self-defense with a knife as I use a cane. But, most people don't, I can see how it would be a viable option for them.
 
Also, it's cool to see such a large folder as the Rajah II in use outdoors, very cool. I've always kinda wanted one even though I'd have no use for it. It's a cool knife. I'd have a heckuva time sharpening it though.
 
My brother was 9; I was about 10; and my cousin 11. We were throwing each other up in the air and into the pool. I had my brother by the arms, and my cousin had his ankles. My brother was face to the sun, laughing. We swung him back and forth a few times at the edge of our pool deck, trying to build up momentum so we could toss him as high as possible over the water. On the downstroke of the last swing when we intended to whip him airborne, I think we put just a bit of extra muscle into it, such that my brother's arched back swung just a bit lower to the ground. I sort of saw what was about to happen before it did. The pool deck was made of metal sections that were locked down into place by panels which each had three bolts. One of the spinal nubs which stuck out on my skinny brother's back was in perfect alignment with the line of bolts which secured one of the panels to the deck, and as we drove my brother's body down during that last swing I cringed as this vulnerable, unsuspecting bone on his spine smashed into one of the metal bolt heads hard enough to shake the whole platform. This happened faster than my cousin and I could react, and we went forward with the entire motion, full force, tossing my brother--who had let out a blaring whelp and started to cry--high into the air. He paused midair flailing and struggling like a defenseless puppy, rotated slowly over, and then slapped down onto the surface of the water like an open hand, belly first.

That was the worst spine whack I've ever witnessed.
 
Excellent stories and pics! This seems precisely such a scenario where a strong lock that works is a good idea.

Do you have any fixed blades you use for these purposes?

Sure but at the time, it just seemed easier to use the knife I had in my pocket rather than go back down and get a more proper tool.
 
My brother was 9; I was about 10; and my cousin 11. We were throwing each other up in the air and into the pool. I had my brother by the arms, and my cousin had his ankles. My brother was face to the sun, laughing. We swung him back and forth a few times at the edge of our pool deck, trying to build up momentum so we could toss him as high as possible over the water. On the downstroke of the last swing when we intended to whip him airborne, I think we put just a bit of extra muscle into it, such that my brother's arched back swung just a bit lower to the ground. I sort of saw what was about to happen before it did. The pool deck was made of metal sections that were locked down into place by panels which each had three bolts. One of the spinal nubs which stuck out on my skinny brother's back was in perfect alignment with the line of bolts which secured one of the panels to the deck, and as we drove my brother's body down during that last swing I cringed as this vulnerable, unsuspecting bone on his spine smashed into one of the metal bolt heads hard enough to shake the whole platform. This happened faster than my cousin and I could react, and we went forward with the entire motion, full force, tossing my brother--who had let out a blaring whelp and started to cry--high into the air. He paused midair flailing and struggling like a defenseless puppy, rotated slowly over, and then slapped down onto the surface of the water like an open hand, belly first.

That was the worst spine whack I've ever witnessed.

That sounds like it could have been bad, hope your brother was okay after, nothing serious.
 
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