% lock up?

coop1957

coop1957

Joined
Oct 22, 2002
Messages
2,624
What percentage lock up do you think this is on my 2002 Small Sebenza ?
No problems now with the lock up but what happens when it goes all the way over?
Thanks for your input.
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I'd call that an 85-90% . I'm not sure what happens when it goes all the way over, from what I've read on other knives it can create "lock rock". I don't know if that applies to a CRK.

Why don't you send it in for a spa treatment?
 
I am the original owner. I'd say brand new it was 65-70%. So it has moved a bit in 11 years.
 
Yeah, 80/85%, I've never seen one go 100%. I guess you'll have to wait and see what happens if it does.
 
coop1957 said:
I am the original owner. I'd say brand new it was 65-70%. So it has moved a bit in 11 years.
Click to expand...

Bought this one last week 22/12/2014. Guess things haven't changed much since 2002.. will probably be asking the same question in 2026. LOL

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If it ever goes all the way over you would just send it in and they would make the appropriate fix. It could be as simple as retreating the lockface or a slightly larger stop pin, but they would fix it, but not until it went all the way over and was causing lock problems. I think you have some time before that.
 
Was looking for sharpening youtube videos and coincidentally came across this video..[video]https://m.youtube.com/watch?v=zw3TPYFOp_c[/video]
 
yexactly said:
Bought this one last week 22/12/2014. Guess things haven't changed much since 2002.. will probably be asking the same question in 2026. LOL

imagejpg1_zps9236f055.jpg
[/URL][/IMG]
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That looks really good to me!

It would be interesting to take a poll of the users that have carried the same Sebenza for a number of years and get their impressions on how far the lockup as moved. It would also be interesting to find out if any appreciable movement is associated with use, or conversely, if it has not really moved, what the variable seems to be.

Wrist flicking open with authority? Normal thumbstud pivot open, etc.

I rarely flick mine open at all..When I do, it's for the novelty of the CLUNK and I am satiated. I haven't seen mine really move, but then again...I rotate through a few.
 
jasonbournemp said:
I'd call that an 85-90% . I'm not sure what happens when it goes all the way over, from what I've read on other knives it can create "lock rock". I don't know if that applies to a CRK.

Why don't you send it in for a spa treatment?
Click to expand...

Ajack60 said:
Yeah, 80/85%, I've never seen one go 100%. I guess you'll have to wait and see what happens if it does.
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One of mine, a small Regular from 1995 or 1996 (I forget; would have to check the card) eventually went to 100% and developed some lock rock a couple of years ago. Always opened carefully, by the way, never flicked. CRK replaced the stop pin, for free, and it is good for another 15+ years or more, I'd expect. :thumbup:
 
Yes, I've done the Jdavis882 lock up trick. It really has not changed the amount of lock up. If it has it is not to a degree that I can notice.
 
jasonbournemp said:
I'd call that an 85-90% . I'm not sure what happens when it goes all the way over, from what I've read on other knives it can create "lock rock". I don't know if that applies to a CRK.

Why don't you send it in for a spa treatment?
Click to expand...

I don't think I've ever heard of any CRK having lock rock. CRK are susceptible to potential flaws like any other product, but I don't think lock rock is one of the flaws that have been encountered, thankfully. I've had a knife with lock rock and it's pretty much the most annoying damn thing that can happen to frame lock IMO.
 
I am going to get a spark plug gap tool and take the measurement then take it again in a year to see if it is increasing.
 
Interesting that some consider that as much as 90% lockup.

Here's my take on estimating lockup percentage:

The total available lockbar travel starts where the inside edge of the lockbar meets the edge of the blade tang (0% lockup), and ends where the inside edge of the lockbar contacts the opposite handle slab (100% lockup). I took the liberty of marking up the OP's photo to illustrate. The thick lines show the total available lockbar travel. The thin line is at 50%.

6CUVu7b.jpg


In that photo the edge of the lockbar looks like it's about three quarters of the way across the total available travel distance, i.e. 75% lockup.

So what am I missing? Feel free to point out the flaws in my reasoning. :)
 
se4g4e said:
Interesting that some consider that as much as 90% lockup.

Here's my take on estimating lockup percentage:

The total available lockbar travel starts where the inside edge of the lockbar meets the edge of the blade tang (0% lockup), and ends where the inside edge of the lockbar contacts the opposite handle slab (100% lockup). I took the liberty of marking up the OP's photo to illustrate. The thick lines show the total available lockbar travel. The thin line is at 50%.

6CUVu7b.jpg


In that photo the edge of the lockbar looks like it's about three quarters of the way across the total available travel distance, i.e. 75% lockup.

So what am I missing? Feel free to point out the flaws in my reasoning. :)
Click to expand...

Good imagery..When I am considering lockup, I consider it to the blade regardless of where the scales are, since the blade is the working part of lockup. So, if I were to draw this, the lines would be on the blade and not on the scales and of course,..bisect the lines for centerline.
 
I was always with the understanding that the lock up is measure by the inside of the lock bar in relation to the position on the pivot portion of the tang. One edge being 0 and the other being 100.
 
I would say its 70%-85%. Depends on how you look at it. Me personaly, I pick and choose with my lockup as I like 50%. I have passed on a great deal CRK over the years because of this. I have talked to Chris about it and the 75% is fine, its just a personal preference that I have. To me, there is more room for wear. But I know in my lifetime, I am unlikely to wear any out, EVER, so its just me being picky....lol
 
Lock up on my 21 is real late. Its very hard to disengage with thumb alone and drags quite a lot. Will be sending in to CRK Spa hoping they will add a larger stop pin. Its just no fun carrying this knife anymore and thats a drag as the action is prob the best I own.

 
Yes..that one is pretty bad! Good call to send it in :thumbup:
 
Zeta33 said:
I don't think I've ever heard of any CRK having lock rock. CRK are susceptible to potential flaws like any other product, but I don't think lock rock is one of the flaws that have been encountered, thankfully. I've had a knife with lock rock and it's pretty much the most annoying damn thing that can happen to frame lock IMO.
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It happens. It happened to one of mine. It can be easily repaired, and CRK did so for no charge. :thumbup: The reason you don't hear many reports with Sebenzas is that very few really get used for more than opening the mail. :o
 
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