Disappointed by ZT 560

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kniferbro said:
I don't expect to have any. The grooves wore to that point and have stayed for a while. I really believe that once the races are established, wear rate drops significantly.
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would it be possible to see pics of the bearings and other mating surfaces, this makes no sense to me. I just took apart a new one and the titanium surface was perfectly flat, which would in my mind result in only one groove from bearings when wear occurs, yours has several different grooves.

Dave
 
kershawguy said:
would it be possible to see pics of the bearings and other mating surfaces, this makes no sense to me. I just took apart a new one and the titanium surface was perfectly flat, which would in my mind result in only one groove from bearings when wear occurs, yours has several different grooves.

Dave
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Sure Dave, once I get home from work. The multiple races you are seeing is probably caused by the fact that the KVT doesn't sit snug in the milled pockets. You can usually shake a KVT knife and hear the bearings move around.

Any specifics on what pics you would like?
 
Im afraid my 560 won't be able to drive nails like I want it to.
But I've had it since it was released and it has yet to fail as a cutting tool.
The bearings also make it a pleasure to open/close and that makes a fun conversation for non-knife folk.
ZT isn't going anywhere but up.
 
Here is a picture of a newer 560 I found for reference or comparison, I dont know how the kvt could be so loose it would shake around inside the milled pockets...it will be interesting to see other pictures...
 
brandoak said:
Here is a picture of a newer 560 I found for reference or comparison, I dont know how the kvt could be so loose it would shake around inside the milled pockets...it will be interesting to see other pictures...
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Looks like some galling starting and you can see where the bearings are digging in already. I'd hate to see it after adding some abrasive material like cardboard dust that gathers in that area. Will grind it right down quickly.
 
I think someone needs to look up the term 'galling'.

I believe the correct classification is burnishing which is to be expected.

Next thing we know people will be complaining that their detent balls are carving a groove in the blade...
 
kershawguy said:
would it be possible to see pics of the bearings and other mating surfaces, this makes no sense to me. I just took apart a new one and the titanium surface was perfectly flat, which would in my mind result in only one groove from bearings when wear occurs, yours has several different grooves.

Dave
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It could be just slop from the bearing holder itself plus the bearings not being all exactly equidistant to the center.

I am surprised at the groove. It means the handle was under tension (maybe too much?).
 
craytab said:
Wow. Classic troll picture. Good work! You are proving our point for us. You have no experience of which you speak so this is the best you can do. Cast doubt and troll. :yawn:
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Sorry craytab if I've offended you in anyway or by casting doubt on obviously a favorite knife of yours
by posting my concerns well founded or not. You seem very irritated and accused me of being a
“arm chair knife expert” and now a “troll”...so I made a funny picture....I think I have raised a genuine concern for discussion here for anyone who chooses to participate, being called names is not something I thought I would have to endure on this forum when I joined yesterday. Heck I just might use the picture as my avatar...lol
 
Yep. You need slightly thicker skin than normal to survive this place. But if you stick around long enough, it can become your home away from home. :)
 
craytab said:
Wow. Classic troll picture. Good work! You are proving our point for us. You have no experience of which you speak so this is the best you can do. Cast doubt and troll. :yawn:
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I dont know why u seem to take this so personally, or why u seem to white knight it against all the possible trolls in the world but ur coming across just as bad.
 
The wear from the bearings remind me of the grove that detent balls can make into the blade. Personally I've never had an issue arise from this.
 
brandoak said:
Sorry craytab if I've offended you in anyway or by casting doubt on obviously a favorite knife of yours
by posting my concerns well founded or not. You seem very irritated and accused me of being a
“arm chair knife expert” and now a “troll”...so I made a funny picture....I think I have raised a genuine concern for discussion here for anyone who chooses to participate, being called names is not something I thought I would have to endure on this forum when I joined yesterday. Heck I just might use the picture as my avatar...lol
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If you see nothing wrong with your "funny picture" then I wish you good luck here.

And don't you think if this was a serious issue it would have been brought up many times before by people who actually own and use ZT bearing knives?
 
craytab said:
And don't you think if this was a serious issue it would have been brought up many times before by people who actually own and use ZT bearing knives?
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I agree that we probably would have heard this come up a time or two.

I do appreciate the discussion but it's kind of a stretch to claim disappointment in something that has yet to and may or may not occur.
 
benchwarmer380 said:
The wear from the bearings remind me of the grove that detent balls can make into the blade. Personally I've never had an issue arise from this.
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Right. But that's steel against steel rather than steel against Titanium. I still don't think it's an issue if you don't abuse your knife. But I'll be interested to hear what Dave has to say. Until then, I'm sticking with the notion that bearing wear was factored into the design of the knife and tolerances were incorporated to offset it. But we'll see.
 
benchwarmer380 said:
I agree that we probably would have heard this come up a time or two.

I do appreciate the discussion but it's kind of a stretch to claim disappointment in something that has yet to and may or may not occur.
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And in a knife he only owned for an hour and never used. Plus posting multiple "funny pictures". And further making claims about our glass slipper collection. That is not a discussion.
 
To me it seems that I'm the only one who has a knife that has (and has pics) what the OP fears will happen to bearing knives that ride on Ti.

The 0562 pictured has zero play (held to my HIGH standard), and is still smooth if not smoother than when it was NIB.

Shouldn't that settle this debate?

...for now :D
 
benchwarmer380 said:
I agree that we probably would have heard this come up a time or two.

I do appreciate the discussion but it's kind of a stretch to claim disappointment in something that has yet to and may or may not occur.
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Knfebro's picture is a prime example that it has occurred and could happen to all 560's when used on a daily basis. Is it something that should be corrected? I think so. Many knife makers and companies foresaw it as being a problem and designed or included a hardened surface for there bearings to ride on.

I went camping last week and my friend picked out a camp site for us, I was disappointed in it because it had a dead tree with a widow maker hanging from it, of course it was something that has yet to and may or may not occur......but...then again I dont think he likes me.....I did find a snake in my tent.....4 separate times.....hhmmm:o
 
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brandoak said:
Knfebro's picture is a prime example that it has occurred and could happen to all 560's when used on a daily basis. Is it something that should be corrected? I think so. Many knife makers and companies foresaw it as being a problem and designed or included a hardened surface for there bearings to ride on.
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Why should it be corrected if it's not a problem? Don't break it if it ain't fixed or something like that right?

Here's a question for you more mechanically inclined folks, is it better for bearings to run in a race rather than a flat plane?
 
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