Anyone else have a liner lock problem with their 0200? Mine will pop open with a spine whack against the palm of my hand let alone a hard surface - and not a real hard whack, either. I sent it in to Kai and received it a back. It still fails a spine whack against my palm. It is marginally harder to make it fail but it still fails. I really don't want to send it back again - cost 12 bucks the first time and had a 3 week turnaround - so I'm thinking of trying to fix it myself. Any suggestions?
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0200 problems
- Thread starter 45Shooter
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- Jan 31, 2012
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That is NOT how you test a liner lock. Spine whacking is how you abuse a knife and void you warranty.
What could you possibly be doing with a knife that would cause it close like that? How have people been able to go decades with just slipjoints and not hurt themselves?
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*facepalm*
Looks we got another spine whacker.
Looks we got another spine whacker.
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This:thumbup: Spine whacking puts an enormous amount of stress on a lockbar and is not a good way to test one.
I knew I'd catch hell about spine whacking
But seriously, I really don't think a light spine whack is an unfair or abusive test of a lock. After all, the function of a lock is to securely lock even if somewhat abused IMHO. Accidents do happen. Suppose you were chopping and inadvertently strike the spine against something on the upswing and the lock fails? Even more seriously, what if you have to use your knife in self defense and in the heat of a fight strike it on a doorjamb, wall or floor? As to the 0200 in question, I tapped lightly - and I mean lightly, not a heavy full strength blow nor anywhere close to it - against a carpeted floor once and it popped open. That surprised me so much - because the lock up seemed rock solid with no play in any direction - that I tried it against my palm with the same result, though it took three slightly heavier taps. I flicked the knife open hard to get as much engagement as possible and tried again against my palm several times. Every time, in one to three tries, the lock popped. I just think that fundamentally unacceptable in what is regarded as a hard use tactical folder.
But seriously, I really don't think a light spine whack is an unfair or abusive test of a lock. After all, the function of a lock is to securely lock even if somewhat abused IMHO. Accidents do happen. Suppose you were chopping and inadvertently strike the spine against something on the upswing and the lock fails? Even more seriously, what if you have to use your knife in self defense and in the heat of a fight strike it on a doorjamb, wall or floor? As to the 0200 in question, I tapped lightly - and I mean lightly, not a heavy full strength blow nor anywhere close to it - against a carpeted floor once and it popped open. That surprised me so much - because the lock up seemed rock solid with no play in any direction - that I tried it against my palm with the same result, though it took three slightly heavier taps. I flicked the knife open hard to get as much engagement as possible and tried again against my palm several times. Every time, in one to three tries, the lock popped. I just think that fundamentally unacceptable in what is regarded as a hard use tactical folder.
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I knew I'd catch hell about spine whacking
Regardless of how stupid spine whacking may or may not be, you're not happy so send it in with a detailed description of what's happening and what you want done.
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you could always file the lockface of the liner a little bit to get better contact, but that would probably nullify your warranty. SOme knives if they have super early lock up, I file down to get full contact with the liner.
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According to who?
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Cerainly there are imperfect locks just as there are imperfect blades. I'm not a spine whacker and I never have been. But If spine whacking is not the correct way to test a lock's ability to perform its function, what method of testing is acceptable? 
Last edited:
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Wouldn't intended use be a good test? I've had a couple of 0200s in the past, and while they weren't really my kind of knife, I never encountered any kind of lock issue at all. Same goes for my 0700 which had the same liner lock design, and the 0780s that I had. Even though the 0780s had some vertical play, the lock still didn't fail.
Maybe a phone call to their CS dept. would allow you to detail exactly what the situation is, and come to an understanding of what to do about it.
Maybe a phone call to their CS dept. would allow you to detail exactly what the situation is, and come to an understanding of what to do about it.
Sorry, no pics - can't get a in focus close up
Lock up is definitely not early. The blade is twice as thick as the liner arm and at least 90-95% of the liner is engaged. I'm starting to think that the lock face was cut at slightly too acute an angle and maybe polished a bit too smooth. When unlocking normally, I feel absolutely no friction at the lock face the way you do on a lot of liner locks. I also just noticed that the blade is no longer centered!Sorry, no pics - can't get a in focus close up
Lock up is definitely not early. The blade is twice as thick as the liner arm and at least 90-95% of the liner is engaged. I'm starting to think that the lock face was cut at slightly too acute an angle and maybe polished a bit too smooth. When unlocking normally, I feel absolutely no friction at the lock face the way you do on a lot of liner locks. I also just noticed that the blade is no longer centered!