Been fighting buying one for a long time now and need a bit of coaxing. How easy is it to hyper extend the lock on a Seb? I've hade framelocks and never gave it a second thought but Sebs seem sensitive to a bunch of playing with them and I know if I get one it will be played with A TON.
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Thinking about taking the plunge
- Thread starter bobnery
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i have had numerous sebbies and i never have had an issue hyper extending the lock bar. obviously, i would assume that it can be done, but i am sure crk would fix it.
unlocking a sebbie is very smooth and the lock bar has a gradual tension to it. it does not feel like other locks out there. other locks that i have felt were too easy to unlock or they had an initial stickiness to them that would make disengagement abrupt. this does not happen with the sebbie.
good luck with the search, they are worth every penny.
unlocking a sebbie is very smooth and the lock bar has a gradual tension to it. it does not feel like other locks out there. other locks that i have felt were too easy to unlock or they had an initial stickiness to them that would make disengagement abrupt. this does not happen with the sebbie.
good luck with the search, they are worth every penny.
Based on having used Small and Large Sebenzas for 10 years or so, I think there is no concern to be had here.
First, the amount of force required to disengage the lock is significantly less than what's required to move the lock into hyper-extension. Second, there is nothing compelling you to continue to apply force in that direction.
This is perhaps a little like saying, "What's keeping me from suddenly jerking the wheel and putting my car off a cliff?" Common sense? The desire to remain alive?
Just because there is no physical protective in place to prevent it, does not mean that a particular action is going to occur. Fundamental premise of conservatism.
Now, if one were going to argue that a device such as a Hinderer stop had inherent structural strengthening advantages, that is more logical. It's easy enough to calculate a moment at the pivot, and an associated axial force in the lock bar. Considering the bar as a column with a restrained base, one can see that lateral deflection via buckling is a likely failure modality, and therefore lateral bracing presents itself as an avenue for strength enhancement.
This is not a concern for me, as I have no intention of placing anywhere near that much force on a folding knife. What I am looking for is quality of action and security of lock-up with much lower forces applied to the knife.
I do suspect that if one were to pull-test a group of Sebenzas to failure, one would find that addition of a lock bar stop (along with enlarged pivots and stop pins) would allow the mechanical action's strength to exceed that of the blade, thereby enhancing the overall robustness of the knife. I don't see this as a liability of the Sebenza's design, but it is the direction I would have at least started in with the project the became the Umnum. Getting O/T here.
Anyhow, what I am saying is that IMO, the Sebenza is a well-balanced design for its intended purpose, and possesses reasonable capacity to exceed that scope of use.
Another way of looking at this is that I would be more likely to modify a Sebenza by thinning out its blade (better cutting) than by beefing up its lock (more structure). Once the blade's structural strength drops significantly below the frame's, enhancement of the frame's strength is definitely moot... unless maybe you have multiple blades.
Don't worry, man. The knife works great.
First, the amount of force required to disengage the lock is significantly less than what's required to move the lock into hyper-extension. Second, there is nothing compelling you to continue to apply force in that direction.
This is perhaps a little like saying, "What's keeping me from suddenly jerking the wheel and putting my car off a cliff?" Common sense? The desire to remain alive?
Just because there is no physical protective in place to prevent it, does not mean that a particular action is going to occur. Fundamental premise of conservatism.
Now, if one were going to argue that a device such as a Hinderer stop had inherent structural strengthening advantages, that is more logical. It's easy enough to calculate a moment at the pivot, and an associated axial force in the lock bar. Considering the bar as a column with a restrained base, one can see that lateral deflection via buckling is a likely failure modality, and therefore lateral bracing presents itself as an avenue for strength enhancement.
This is not a concern for me, as I have no intention of placing anywhere near that much force on a folding knife. What I am looking for is quality of action and security of lock-up with much lower forces applied to the knife.
I do suspect that if one were to pull-test a group of Sebenzas to failure, one would find that addition of a lock bar stop (along with enlarged pivots and stop pins) would allow the mechanical action's strength to exceed that of the blade, thereby enhancing the overall robustness of the knife. I don't see this as a liability of the Sebenza's design, but it is the direction I would have at least started in with the project the became the Umnum. Getting O/T here.
Anyhow, what I am saying is that IMO, the Sebenza is a well-balanced design for its intended purpose, and possesses reasonable capacity to exceed that scope of use.
Another way of looking at this is that I would be more likely to modify a Sebenza by thinning out its blade (better cutting) than by beefing up its lock (more structure). Once the blade's structural strength drops significantly below the frame's, enhancement of the frame's strength is definitely moot... unless maybe you have multiple blades.
Don't worry, man. The knife works great.
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The pocket clip, in itself, would seem like a stop, just from pictures.
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I've used several different framelock folders over the years (including Striders BTW...) and don't think Sebenzas are more sensitive to handling or prone to over extension than any other framelocks. In fact, as knivesandguns mentioned, the pocket clip seems to exert enough pressure on the lock to minimize any danger of hyper extension.
This small Sebenza has been my go to EDC for the better part of the past 13 years and, in that time, it has been played with at least a ton.
I've used to cut things that I probably shouldn't have and even pried with it on occasion 
and never had any fear of over-stressing the lock or of having it fail in any way. :thumbup:
p.s. Apologies for the pocket crud in the pic. 
This small Sebenza has been my go to EDC for the better part of the past 13 years and, in that time, it has been played with at least a ton.
I've used to cut things that I probably shouldn't have and even pried with it on occasion and never had any fear of over-stressing the lock or of having it fail in any way. :thumbup:
p.s. Apologies for the pocket crud in the pic.
- Joined
- Feb 2, 2005
- Messages
- 4,271
...Don't worry, man. The knife works great.
:thumbup: What he said!
I've never had a problem with any of the 11 Sebs I've had. I use them for EDC, camping/hiking carry, and anything that any other knife would do. No lockup or lock bar problem whatsoever.