Zero tolerance 0550 model..

gine

gine

Joined
Sep 2, 2007
Messages
1,169
I really like this knife, and it looks like a solid and well built Ti frame lock.
My only concern is the lock bar cutout.It seems a little thin compared to
the thickness of the Ti slab.It looks like a week link,and I wish it was twice
as thick.It looks similar thickness as lighter use frame locks,like CRK zaan,
seb,spyderco military ect..nothing against those models though,just medium
use knives...I would put up with a little stiffer lock bar action to have a
little more strength......This is prevented me from ordering this knife......
Anyone else notice this,I haven't seen much on it.....great knife...but
could be better with a beefier cutout.
 
I don't own this knife, but I have seen pictures of it, and it does not look too extreme. I don't think they can make it thicker and still keep the desired springiness. If you look at other popular and/or timeproven frame locks, they all have a cutout. The only linerlocks with no cutouts are the ones that are thin to begin with. I don't think there is any chance of that bit of Ti crumpling over and snapping off.
 
gine said:
My only concern is the lock bar cutout.It seems a little thin compared to
the thickness of the Ti slab.It looks like a week link,and I wish it was twice
as thick.
Click to expand...

I am NOT knocking any folders, but this fellow has a point. Batoning with a folder may be harmful to your knife. And folks, I really DON'T know what brand or model this knife is, so I'm not a hater.

Showing what happens when cut-out lacks sufficient support…post #25
http://www.bladeforums.com/forums/s...only-one-quot-post-with-a-slight-twist!/page2

I don't treat my knives hard at all. Some folks do, I guess.
Sonny
 
I've got some Kershaws: JYDII in Ti/SG2; ZT's: a 301, two 0551's, and an 0561; Benchmades: 630, 760, 790; and, even a CRK 'zaan and small Sebbie. All framelocks - all have about the same thickness/width at the spring relief in the Ti. The ZT's have the Hinderer style limiter, so over-extension shouldn't ever be a problem. I can't imagine describing any of them as 'medium use' knives! I'll wager C. R. would be shocked to hear his knives were 'medium use'. As knives - not pry-bars - I believe they all would rate as 'heavy use'. Just my opinion...

Thinking about it, I do have heavier use knives... a KaBar Becker BK2 - .25" of CS - heavy tang/handle... oh yeah, it's a fixed blade!

Your intended use must be pretty demanding!

Stainz
 
Stainz said:
I've got some Kershaws: JYDII in Ti/SG2; ZT's: a 301, two 0551's, and an 0561; Benchmades: 630, 760, 790; and, even a CRK 'zaan and small Sebbie. All framelocks - all have about the same thickness/width at the spring relief in the Ti. The ZT's have the Hinderer style limiter, so over-extension shouldn't ever be a problem. I can't imagine describing any of them as 'medium use' knives! I'll wager C. R. would be shocked to hear his knives were 'medium use'. As knives - not pry-bars - I believe they all would rate as 'heavy use'. Just my opinion...

Thinking about it, I do have heavier use knives... a KaBar Becker BK2 - .25" of CS - heavy tang/handle... oh yeah, it's a fixed blade!

Your intended use must be pretty demanding!

Stainz
Click to expand...
I never described the zt 301,561 as medium use knives,and never mentioned anything about JYDII,or any benchmades..
And no, the cutouts aren't all the same.Nothing against CRK,but I can't say it's not tough as a 301,so thats my
reasoning for calling it a med. use knife..just trying to categorize them. also just IMHO.

My uses are not that demanding...I know when to use a fixed blade.
 
I'm pretty sure someone showed a picture with the ZT 0301 side by side with a ZT 0551, which showed that the thickness of the Ti of both knives were roughly about the same. It only looks thinner because the titanium lockbar is monstrously thick in comparison.
 
Yeah I just looked at my JYD and my 300 and they're about the same. Can't imagine it being thinner than the JYD. I kinda wish it was cut on the outside though.
 
Stainz said:
I've got some Kershaws: JYDII in Ti/SG2; ZT's: a 301, two 0551's, and an 0561; Benchmades: 630, 760, 790; and, even a CRK 'zaan and small Sebbie. All framelocks - all have about the same thickness/width at the spring relief in the Ti. The ZT's have the Hinderer style limiter, so over-extension shouldn't ever be a problem. I can't imagine describing any of them as 'medium use' knives! I'll wager C. R. would be shocked to hear his knives were 'medium use'. As knives - not pry-bars - I believe they all would rate as 'heavy use'. Just my opinion...

Thinking about it, I do have heavier use knives... a KaBar Becker BK2 - .25" of CS - heavy tang/handle... oh yeah, it's a fixed blade!

Your intended use must be pretty demanding!

Stainz
Click to expand...
Well,you are right about the cutout thickness.I just compared my zt 301,kershaw JYDII SG2/TI, and my spyderco chokwe.
But the width on all three are different.The width on the relief cutout would give each model a different strength rating,
the zt 301 being the widest of course.The 0560 looks thicker then the 0550, in the pictures I have seen here on the
forum..correct me if I'm wrong...Would anyone put the 0550 in the same category as the 301 in strength?I know the length
of the bar and where the cutout is comes into affect too..

thx..
 
The minimum thickness, measured with my fine, made in the PRC, sale priced at $15 from Harbor Freight 6" digital caliper, are as follows:

CRK small Sebbie - .053"
" Umnumzaan - .055"
Benchmade 630 - .046"
" 760 - .046"
" 790 - .041"
Kershaw JYDII Ti - .043"
ZT 0301 - .042"
" 0551 - .042"
" 0561 - .051"

Kind of shocking, eh? The CRK's have a short double divit as opposed to a longer one, as the rest have. The bevel on the ZT 0551 is misleading - it makes it appear as thick as the 0561, which it isn't. The width of the flex divits varies - with the 0301, 0551, and 0561, in ascending order, being the widest. The BMs were the narrowest.

I say this tongue in cheek, but a CRK small Sebbie is a stout small knife - and a 'zaan is a stout medium knife. Mine don't get used as such... they were too expensive - and I can only afford the ones I have!

There is more to a stout folder than the flex divit's thickness in the framelock's Ti lockbar. Pivot screw - bushings - bearing surface - back spacer - construction screws - stop pin(s), etc, all combine to make a stout package.

Stainz

PS Last year found me buying a spare 0551 - I really love that knife. The one I wanted the longest was the huge BM 630 Skirmish - today, if I could only keep one of the above as a knife - it'd be the 0551 (My 0561 is still new - only a couple of days old!), Of course, if I had any sense, and could only keep one - it'd be the 'zaan... which I'd sell and buy a couple of the others with the proceeds. If I really had any sense - I'd have stopped with the first of the above knives - the JYDII in Ti & SG2! Think of the money I'd have... Heck - get the 0550 - you'll carry & use it a lot more than the 0301, etc.
 
Last edited:
jossta said:
I kinda wish it was cut on the outside though.
Click to expand...
So more like this?

IMG_1089.jpg
 
You get this to buckle...dang not sure what could cause this under folder usage. My opinion is the 0560 should be classified with a 03XX.

IMG_1091.jpg
 
Thomas, is that a new variant or an earlier, abandoned design? The deep-carry clip and laser-cut lock bar would suggest it's an upcoming model. Looks real good. I like the finish, too. Would love to see that make it to production.
 
I don't worry about the lockbar cutout on my ZT knives, I'm sure they are plenty strong enough for any use I have for a folding knife. And by the way bruleront, like your avatar, KG is one of my favorites and Discipline was a great album, the 5.1 version is awesome.
 
Stainz said:
The minimum thickness, measured with my fine, made in the PRC, sale priced at $15 from Harbor Freight 6" digital caliper, are as follows:

CRK small Sebbie - .053"
" Umnumzaan - .055"
Benchmade 630 - .046"
" 760 - .046"
" 790 - .041"
Kershaw JYDII Ti - .043"
ZT 0301 - .042"
" 0551 - .042"
" 0561 - .051"

Kind of shocking, eh? The CRK's have a short double divit as opposed to a longer one, as the rest have. The bevel on the ZT 0551 is misleading - it makes it appear as thick as the 0561, which it isn't. The width of the flex divits varies - with the 0301, 0551, and 0561, in ascending order, being the widest. The BMs were the narrowest.

I say this tongue in cheek, but a CRK small Sebbie is a stout small knife - and a 'zaan is a stout medium knife. Mine don't get used as such... they were too expensive - and I can only afford the ones I have!

There is more to a stout folder than the flex divit's thickness in the framelock's Ti lockbar. Pivot screw - bushings - bearing surface - back spacer - construction screws - stop pin(s), etc, all combine to make a stout package.

Stainz

PS Last year found me buying a spare 0551 - I really love that knife. The one I wanted the longest was the huge BM 630 Skirmish - today, if I could only keep one of the above as a knife - it'd be the 0551 (My 0561 is still new - only a couple of days old!), Of course, if I had any sense, and could only keep one - it'd be the 'zaan... which I'd sell and buy a couple of the others with the proceeds. If I really had any sense - I'd have stopped with the first of the above knives - the JYDII in Ti & SG2! Think of the money I'd have... Heck - get the 0550 - you'll carry & use it a lot more than the 0301, etc.
Click to expand...

Thanks for taking the time to measure out the cutouts.....Very interesting indeed.Most companies cutouts are close,and there probably is
a reason for this..maybe lock bar spring/memory ect..But it seemed like the really hard use folders i.e. strider have a very wide cutout
area,like more then half the handle width.This would make it a stronger lock then one with the same thickness and less width...

thx.
 
Oh,it looked like the 0550 because it has the same round lanyard hole.The current 0560 has a oval lanyard hole.
It could be the scale before 3d machining?
 
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