ZT 0452 lock up

If there are 'ZT fanboys' out there who go straight into denial whenever someone brings up a serious problem (I'm sure there are), they're not doing ZT any favors, IMO. Ignoring a defect, even if it's only a small percentage of knives affected, hurts the brand worse in the long run. And obviously, it also means that more people keep on getting defective knives. This IS a defect. If it isn't, I'd be very disappointed with ZT.
 
What serial number is it? From reading around on the lock problem it seems the earlier serial numbered 0452cf knives had the issue and the later not as much travel or any.
 
willgreenzilla said:
What serial number is it? From reading around on the lock problem it seems the earlier serial numbered 0452cf knives had the issue and the later not as much travel or any.
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That doesn't answer the question why my 0454, 0452, and 0562 all have the same problem...
 
Sikael said:
If there are 'ZT fanboys' out there who go straight into denial whenever someone brings up a serious problem (I'm sure there are), they're not doing ZT any favors, IMO. Ignoring a defect, even if it's only a small percentage of knives affected, hurts the brand worse in the long run. And obviously, it also means that more people keep on getting defective knives. This IS a defect. If it isn't, I'd be very disappointed with ZT.
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I would suppose it's a bit hard to find out, just what ZT would call this lock bar issue, now that they have no presence here. I myself never have any luck trying to run a big company down on something like this. Maybe someone knows a way to get a official statement on it. Before when there was a subforum here, these type threads went there and answers/solutions would come. Now you just have to send it in and see what they do, as I doubt you'd get much reason on why, or if it's considered a problem from the people handling ZT's phones.
 
I agree that this issue an unacceptable issue. I would send that thing in until they fixed it. Hopefully ZT won't make this a pattern. That said, to say "Zero Tolerance has zero tolerance for making a good lockface" is not only factually incorrect but a bit on the hyperbolic side of things. I understand some folks have issues but a blanket statement like this is just incorrect. Not one of my ZTs exhibit any sort of lock issue.
 
craytab said:
I agree that this issue an unacceptable issue. I would send that thing in until they fixed it. Hopefully ZT won't make this a pattern. That said, to say "Zero Tolerance has zero tolerance for making a good lockface" is not only factually incorrect but a bit on the hyperbolic side of things. I understand some folks have issues but a blanket statement like this is just incorrect. Not one of my ZTs exhibit any sort of lock issue.
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I agree I painted that with a broad brush. However I flat out don't like ZT, so I have no problems denouncing the brand. 3 bad lock faces in a row on my end, now this? That's more that just unacceptable...
 
Blues Bender said:
I agree I painted that with a broad brush. However I flat out don't like ZT, so I have no problems denouncing the brand. 3 bad lock faces in a row on my end, now this? That's more that just unacceptable...
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I would say that is fair. It would piss me off as well. And there are tons of other knives out there. Just isn't my experience or even close to it.
 
Any knife that exhibits this behavior is defective. I would return the knife for a refund and move on.
 
stabman said:
(but not a virtual fixed blade...)
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that was good.....


back to the topic....i think this falls into the old michael walker saying (i'm paraphrasing)he is happy people are using his invention but sees many are not doing it correctly. from big to small makers and everything in between. the liner lock got a horrible reputation with many, over poorly done ones that didn't work properly. other than holding open the blade without any pressure applied. same applies to this frame locks. in my mind anyways.

Jill and others with said knives and issues with lockbar locations...question...... what happens when you flip it open and it does normal lock up and then start cutting,...it pushes all the way over? seems odd. i've only personally seen really cheap knives do this when cutting with some force with them. usually from sloppy tolerances. i can't imagine zt would have sloppy tolerances..........i'm staying tuned to learn more.....
 
Ok...I've made up my mind. I feel like a kid again when my mom said, "Don't do that," and I did it and was sorry.

So here's an 801 and 808. Had the both for awhile, used a lot, never had a problem. So I did what some of are doing and put pressure on the lock bar. Did it to all of my ZTs. These two slid right on over. Defect? Misuse?



And in normal lockup.



So my question is: Will the lock bar go to the other side with out forcing it?

This reminds me of the disputes over blade lock up strength where you see people beating the crap out of knife till blade breaks its lock.

Unless the lock bar goes all the way to the right without forcing it...this not a defect.

Just my humble opinion with no disrespect to those who disagree.

Mike
 
I myself have seen these cheap Chinese Hinderer type clones do this and I'm talking about the ones that cost around 10-20 bucks on ebay, that have a all steel slab frame lock, no insert of course and cheap G-10 on the other side.
 
Comparison Reate same type steel insert:
Just flipped
ked850.jpg


Flipped and lock bar pushed as hard as I can with two thumbs.

2vlrypl.jpg
 
None of my ZT's do that.
My CRK Umnumzaan can be pushed most of the way over, but that seems to be the nature of the ceramic ball interface.

My Buck/TOPS CSAR moves over a fair bit in heavy use...it has a rather flat tang.
 
I have one 0452cf with a serial number in the 900 range, and it locks up solid at about 45%, not moving any further, even with pressure. Those that have an issue, should contact ZT. It should be an easy fix for them.
 
EyeDog said:
Ok...I've made up my mind. I feel like a kid again when my mom said, "Don't do that," and I did it and was sorry.

So here's an 801 and 808. Had the both for awhile, used a lot, never had a problem. So I did what some of are doing and put pressure on the lock bar. Did it to all of my ZTs. These two slid right on over. Defect? Misuse?



And in normal lockup.



So my question is: Will the lock bar go to the other side with out forcing it?

This reminds me of the disputes over blade lock up strength where you see people beating the crap out of knife till blade breaks its lock.

Unless the lock bar goes all the way to the right without forcing it...this not a defect.

Just my humble opinion with no disrespect to those who disagree.

Mike
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I do a lot of cutting that require force put on the blade, such as cutting wood lath, push cutting rope, cutting thick plastics, etc. I've noticed that when doing such tasks, my ZT's lockup to the point where it requires 2 hands to close the knife; not good for a fast-paced work environment or when wearing gloves.
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On opening the knife normally, lockup appears fine. I can be pushed over to 100% with moderate pressure. A framelocks lock is obviously on the exterior and is prone to be exposed to moderate amounts of pressure from your hand squeezing it. Now make a push cut that pushes the tolerances against their will, and the lockface moves in a little further, resulting in lockstick.

Read above.
 
Gonna throw in my experience with the 0452.

I just got one in the mail yesterday so i haven't been able to put to many miles on it but a decent amount of pressure forces the lockbar to about 60%. using the flipper sets it to about 30%. Using her nudges it over to around 45% but i dont think i could force it all the way over withought some serious force.

I would personally send mine in if it starts to go all the way over, but it prolly functions perfectly fine either way.
 
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