Lockbar

swe

Joined
Jan 19, 2005
Messages
265
Hi!
It is my first post, so I say hello to everybody!

I have owned 3 Sebbies (one large regular now, I really like them an have one annual limited ordered :D). But I have always wondered about the lockbar movement. My first one (classic without inlays) engaged around 50 % of the lockbar when it was new. After a couple of weeks the lockbar was over to more than 75 % and then it stopped very, very close to the non locking side. CR company told me (of course) that they would take care of it. But I took it apart and cleaned it and then the lockbar was back to 45-50 % and I kept it like it was.

On my second one (a classic with snakewood) was always 50 % of the lockbar engaged. After months of pretty hard use it was still 50 %. When I took it apart and cleaned it nothing more happened than it became clean – the lockbar was 50 %.

And now my third one (plain regular) is like the first one but with more differences. As cleaned is less than 50 % engaged after a couple of weeks is the lockbar a hair from the non locking side.

Is this normal? It is not a very big problem for me but Sebenzas is famous for always being the same and tight tolerance. Can someone tell why taking the knife apart seems to solve the problem (if it is a problem, I am still not sure) for a couple of months?

(I made a search operation without finding much about the subject, sorry if it is written a lot about it)
 
You ask a good question namely "why does taking apart the knife change where the lock bar locates?".

I would have to assume that taking the knife apart, cleaning it and coincidentally rotating the stop pin/bushing makes the difference.
 
Yes, I guess you are right. It is something about the stop pin, but I can not figure out what it is.
 
Think about it. The Seb's pivot screw, unlike most other folders, screws down tight, clamping the pivot bushing motionless the very same way it does with the stop pin. To this end, my theory is that when you dissassemble-reassemble, you're freezing the bushing and stop pin in essentially different positions every time, from a micro-fine-tolerance perspective. That in turn affects the lockbar interface with the blade tang ramp.

No matter what the case, I've yet to wear my lockbar out with daily use. It's been my EDC since February '02, and for the most part, the lockbar seems to engage where it always has, give or take a micrometer (if that is actually a unit of measurement). :)

Professor.
 
Thanks professor, it sounds like a good theory. I guess it is time for me to stop thinking about it. It has really not been a problem, but you allways want to know why things are like they are.
 
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