ZT 0566 hard to open

NeilB said:
I have two 0566s and both have an extremely heavy detent. I leave them half open over night, but so far it hasn't helped much. My 0770 is much the same.
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Why would leaving the knife open over night change its ease of manipulation?
 
I know a lot of people deassist the 566 but what do you expect when you change the builders design. It was intended to be an assisted opening flipper.
 
timwilso said:
I know this might sound crazy...but is this a first frame lock for you? If by chance it is, lots of folks have a hard time opening them because they put excess pressure on the lock bar unknowingly when trying to open them. I had the same problem on my sebenza until I realized it was my hand placement that was causing all the extra pressure against the lock bar & blade that made it difficult to open.
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NP, appreciate the advice. But no, I'm not pressing on the lock bar : )
 
PURPLEDC said:
Why would leaving the knife open over night change its ease of manipulation?
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The theory is, leaving it in a stressed, or loaded state will weaken the spring tension somewhat. I've usually heard this used on traditionals.
I do not believe it will be effective.

aguila327 said:
I know a lot of people deassist the 566 but what do you expect when you change the builders design. It was intended to be an assisted opening flipper.
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Not sure if that was directed at me, I DO want to use the assist.
 
aguila327 said:
I know a lot of people deassist the 566 but what do you expect when you change the builders design. It was intended to be an assisted opening flipper.
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For most people it works as a non-assisted flipper :thumbup:

After all, it has a detent like a non-assisted frame lock flipper unlike most AO knives. Mine was very difficult to open assisted. Torsion bar removed, it was fantastic. Most people who remove the torsion bar find it to be great. In fact if you read the OP he says it is better removed ;)

He wants it AO.
 
Well, I disassembled again, cleaned and checked everything, lubed only the contact surfaces with Militec, and reassembled without the torsion bar. It works pretty smoothly de-assisted.
I have to use a little wrist, but it opens pretty easily. Put the torsion bar back in, and it does work better. The degree of assist feels low however. With the Camber, I can really feel the spring loading,
and it fires right out. On the 0566, it only feels like its loading the last 30% of the travel. I need to use more of a "light switch" type action, and I still need to follow through with a little wrist action.
Still seems to be not quite right.
 
My mistake. I should wake up fully before reading these things. At this point I would send it to ZT. One thing I never expierienced was low torsion on their assisted openers.
 
filedog said:
The theory is, leaving it in a stressed, or loaded state will weaken the spring tension somewhat. I've usually heard this used on traditionals.
I do not believe it will be effective..
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Yeah I dont think that is going to happen. I know the framelocks and liners are not spring tempered but I dont see leaving them half opened is going to do any permanent change. I have used liner locks and frame locks for years and the lockbar pressure never changes unless I physically make it do so. The detent may get easier but that has more to do with small amounts of deformation to the actual detent hold. I think someone would have better luck wishing on a star.
 
filedog said:
The spring seemed weak (maybe cause the knife is sticking) I added MORE tesnion, still doesn't get the blade out. I'm not one of those who hate assist, I'd like to have it work properly.


Heh- so I'm NOT crazy - that's something. Yeah, it's not "user friendly" the way it is. Thought someone was gonna raz me about "soft girly fingers " )
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maybe you have soft girly fingers tho ;)
 
Yah, mine is hard to open too. I still carry it when I want something a bit tougher, but I prefer to EDC one of my three 0770.
 
filedog said:
Aside from that - a fair amount of owners report similar problems. Seems like a design flaw, or poor QC.
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Hard to say exactly what the problem is. Both of mine are slowly slacking off to something tolerable. Lube didn't seem to help much, if any. But, leaving them half open over night does seem to help some. I don't have the time currently to just flip them for hours on end, sadly, but at least they don't make my finger sore anymore.
 
No matter what I did, I couldn't make it easy to open with the torsion bar in. De assisted, it's great - very smooth - no pain :)
I LOVE the ELMAX this blade is made from. Easy to get very sharp!
 
I just picked one up myself, and it's nearly impossible to open. Probably going to return it. Disappointing.
 
Mine is tough to open with the flipper alone, but I read a trick somewhere that works well if you're OK with it: Apply just a tiny bit of pressure on the thumb stud (stop bar, really) while flipping. It should fly open.

Seems kind of dumb that it would make such a difference, but I decided to keep my 0566 and open it that way rather than returning it.
 
sldk said:
I just picked one up myself, and it's nearly impossible to open. Probably going to return it. Disappointing.
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It's easy to deassist, and becomes a very smooth manual flipper. One of my favorite knives.
 
It take 2 minutes to deassist it and that includes removal and installing the scale.
To get it centered and smooth here's the trick:
With knife open at about a 90* angle crank the pivot really tight. Then losen the 3 scale screws (G10 side) but don't remove them. Then push the blade closed (it will be hard). Press blade against the frame lock side then tighten the 3 screws. Finally losen the pivot and the blade should be centered and fire out smooth. I also put white lithium on the washers. This is for a deassisted 0566.
 
Mine was very difficult to open when I first got it a couple of weeks ago but it lightened up rather quickly with use. First day I had it I thought it was going to be impossible to use without helping it with the other hand. Now it works great. Just needs some break in time.

Seems to work best when using just the very tip of the finger and pulling straight down, so that the pad of the finger doesn't slide across the fairly aggressive jimping.

It's really about ideal for me now - still takes deliberate pressure to open it, but flips out with authority and doesn't seem like there is any risk of unexpected opening in the pocket.
 
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