To Spine Whack, or Not to Spine Whack. That is the question

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Jan 28, 2001
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Okay lads, here is the question:

Is "Spine Whacking" a folder considered abuse? In my view, it is since you're basically treating a folder as if it were a hammer.
Who devised this method of testing the integrity of a lock and what knife maker or production company encourages this practice for testing lock strength?

Also, should a knifemaker repair the knife at the request of the owner, because the knife failed a spine whack test? For instance, several knife companies advise not to use their folding knives as hammers or prybars, for obvious reasons. Therefore, is this not considered abuse?

All your opinions will be appreciated.
 
I think spine whacking is a terrible idea. When during the use of a knife does one whack the back of the blade? Aren't we supposed to be cutting with the sharp side ;)???

I'm sure there are less abusive ways of testing for positive lockup.

~Mitch
 
I know Cold Steel does it on their Proof video. I have read of that test in a few knife mags as well.

Yes, I would call it abuse as you are "trying" to break it. Of couse, if it fails the test, do you really want it fixed? Therein lies the irony of a good knife; one is not supposed to abuse it, but you carry it for that one-in-million time when you "need" to abuse it.
 
Originally posted by el cid

Who devised this method of testing the integrity of a lock

I'm going to take a wild guess and say Cliff Stamp.
What do I win if I'm right?
 
Nothing wrong with a good whack into the palm of the off hand. That should show if the lock is slipping or not. To whack one on a solid surface is abuse,IMHO. What happens when one fails? It gets returned to a dealer who may just put it back on the shelf because there are no apparent defects, where it is sold to someone else who is unaware of the abuse by the first buyer. Not a good cycle.
 
It seems that there are quite a few unreasonable knife knuts who hold the position that a locking folder should actually lock! I don't claim to understand these people any more than you do, but they have been circulating rumors that some knives advertised as "locking" folders don't actually lock when closing pressure is applied. In what seems to be a strange cult-like initiation ceremony, they "test" the "locks" on these knives by applying closing pressure, both slowly and quickly, to see whether these "locking" folders actually lock, i.e., remain locked open when closing pressure is applied. One of the most heretical practices of this strange irrational cult is known as "spine whacking," where the irreverent cult member hits the back of an open folding knife on a hard surface such as a table or desk. They claim that this is a way of "testing" the knife, to see if it will remain locked open should something similar happen inadvertently during a hypothetical utility or combat scenario.

There are many who believe that such a scenario will never occur, at least not to them. Some are even converted to this weird cult when their locking folder closes on their fingers and sends them to the hospital. Others read such reports (true or fabricated) and are driven by fear to join this cult and begin the blasphemous practice of "testing" knives on their own. Cult members claim that since some locking folders will remain locked open in the face of such tests, those folders are functionally superior to and safer than those which fail the irrational test.

When reasonable knife knuts and manufacturers suggest that a knife only be used by applying pressure to the sharp side of the blade, thereby reinforcing the lock and ensuring that fingers are not cut, cult members fall back on the rhetoric of "chaotic combat conditions," "downward (closing) pressure that naturally occurs during a stab," and have even been known to have the gall to ask what "locks" are for and what they're supposed to do. I even overheard one of them say, "If you don't need your folding knife to remain locked open when closing pressure is applied, why don't you just carry a SAK or slip joint? I want my locking folders to stay locked open until I intentionally disengage the lock, no matter what forces are applied;" like I said, I don't understand these people any more than you do. When told to get a fixed blade, balisong, or OTF, which will certainly pass the spine whack "test," cult members cite legalities and continue to abuse poor folding knives.

This debate has been done time and time again, and neither side wants to give an inch. The stubborn, unreasonable cult members maintain, in the face of warranties, flames, "proper use" arguments, and ignorance, that a quality locking folder should be able to take this kind of abuse, repeatedly, and stay open. I don't see any possible way of turning them from their heretical ways. It's obvious that reasoning with them is futile. Perhaps we should all pray for them.


Jason aka medusaoblongata, spine whacking cult member #667, and damn proud of it.
 
Jason,
Ya got me ROTFLMFAO!:D

Why has no one has told me about this new cult?!:mad:
I could have made High Priest by now!
EASILY!
 
Originally posted by PhilL


I'm going to take a wild guess and say Cliff Stamp.
What do I win if I'm right?

My guess would be Joe Talmadge, but people have probably been spine whacking since day one.

Personally, I don't spine whack, but I can see the point. One day I managed to accidently hit the back of the blade of my Apogee hard enough to knock the knife out of my hand (don't ask :o) -- and cut my finger in the process -- but the knife didn't close. Real world spine whack test with passing grade.
 
Originally posted by el cid
In my view, it is since you're basically treating a folder as if it were a hammer.
Well, it may be unintentional, accidental, and finally not your choice after all. Someone may hit UR blade during whatever.
 
Here is one reason why I "Spine Whack Test" locking folders.
I was out collecting Magnolia blossoms for my wife one day. Magnolia blossoms have a tough and woody stem supporting their flowers. I was going for a really good one and brought out my new Boker Angler, flicked open the blade and started cutting. I had to do a little impromptu chopping(that stem was extra hard and woody) and when I drew back the blade's spine hit a branch above and snapped the blade closed on my index finger. It did not do major damage but if I had drawn back a little faster before making that chop I may have needed a bit more micro-surgery. It did cut my finger pretty good and I have the scar to prove it.:rolleyes:
NO "lock" blade should have closed with that relatively minor incident. I blamed the folder's thin little liner at the time, but recently found I was mistaken. I took the knife apart and discovered a tiny burr on the tang end that would not allow the lock to fully engage. Removal of that burr remedied the lock failure problem. It now passes the dreaded SWT and I now trust this knife to work as advertised.
 
Spyderco spine whacks every folder that leaves their factory. It's in their video.
 
I had never heard of doing this until I read about it in Bladeforums, so I tested about a dozen knives the other night by whacking them on a metal box covered with a towel. Didn't seem to hurt them, and I found some interesting results.

Not 1 single CRKT failed the test, but my Buck Odyssey failed every time. As a result I will never carry the Buck again.
 
Cold Steel may spine whack folders in their test video but they also say that the tests they perform do constitute abuse and are not safe. Personally, I don't see what's so bad about tapping the back of a (carefully held) blade to see if the lock is a total waste. I wouldn't want to pound it on an anvil, though.

As far as depending on a folding knife in an emergency situation, forget it. It's designed to fold up! Get a fixed blade -- and a good, thick one. Yeah, but that folder might be all you have at the time ... what if all you have is a stockman?
 
wow, it's amazing how many of these threads i've heard, but i haven't read anything new in any of them in a while. medusaoblongata, you did have me cracking up though
edit: oh yeah, i'm for "moderate" spine wacking.

- Pete
 
Originally posted by el cid
Who devised this method of testing the integrity of a lock and what knife maker or production company encourages this practice for testing lock strength?

As far as I know, Knifemaker A.T. Barr did.
 
Originally posted by Toolin
Spyderco spine whacks every folder that leaves their factory. It's in their video.

I've watched that on the Dealer Video...but that is not what some of these people are doing. I've seen some people advocate way more than that.

On the palm seems reasonable though.
 
Spine whacking is not abuse because a knife with a lock should lock, and that's it. Period. (only my opinion - your mileage, or missing digits, may vary)

I spine whack every one of my folders and if it doesn't pass, it doesn't get carried. It gets sent back, thrown away, or sold - with advanced warning to the buyer that it has a lock that fails. I will not carry something I can't depend on. By spine whacking, I don't mean I try to drive nails with the thing - I just whack it with enough pressure to make sure it wouldn't fold up on me unless I wanted it to!

That being said, I have LOTS of folders that pass my spine whack test. Only a select few fail.

A sampling of ones that have passed:
CRKT KFF
CRKT Mirage
CRKT Point Guard
Spyderco Wegner
Spyderco Endura
Spyderco Delica
Cold Steel Large clip point voyager
Cold Steel Medium clip point voyager
Cold Steel Medium tanto point voyager
Cold Steel El Hombre
Cold Steel Scimitar
Rekat Pioneer II
Kershaw Boa
Buck 110
SOG Stingray
and believe it or not - a couple of S&W crapola folders I picked up at the flea market!

A sampling of ones that failed:
Rekat Sifu (before I sent it in to be worked on)
Bear MGC lockback
Bucklite

I will always spine whack every "LOCKING" folder I ever own. I will not consider it abuse, since I don't do it very hard and I usually only do it once... Just hard enough to ease my mind, and let me know I can depend on it.

Here's a question to all the "non-whackers". Say you were assaulted by a thug with a knife. Say you pulled out your trusty "non-whack-tested" folder. Say you stabbed into some ribs, tendons, bone, etc... and say the lock failed and the blade folded and cut your first 2 or 3 fingers off. Would you test your folders "before the fact" after that?

I'm sorry, but I've gotta depend on my knives! I don't like folders near as much as fixed blades anyway. Try to make one of those fail the dreaded whack test!
 
...Balisong.......don't leave home without one!



"Hunters seek what they [WANT].., Seekers hunt what they [NEED]"
 
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