some odd Umnumzaan/Sebenza questions

Esav Benyamin said:
It won't wear down the lock face. The problem is galling: titanium on titanium is "sticky" and hard openings on liner locks and frame locks will jam the lock open as far over as it can go. Add galling to that, and it can make them hard to unlock. Not a major inconvenience, and not significant damage to the lock face, but it's another reason not to use a hard kinetic opening on a precision instrument.
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Titanium on S30V ? :)
 
1. no meaningful difference between the two - neither is meant to be flicked open
2. no meaningful difference
3. good - no meaningful difference between the two
4. The Sebenza pivot is as thick and strong as any I've seen - never heard of one breaking
5. neither has ergos that make you saw "wow," but the edges are smooth and well rounded - the Unum is grippier
 
well I guess now the only question is...regular or 21? I know it's mostly personal preference, it's just so hard to decide!
 
tf8s,

Get the Umnumzaan. It's a great knife. Practically maintenance free, wear-free, super strong, and locks up like a fixed blade.
 
The Umnumzaan frame lock is more complex than the Sebenza. It uses two extra little balls ( no vulgarity intended ) one that meets a detent on the back of the blade when in the lock position, the other rolls along the side of the blade when opening and closing. A general rule of thumb is " If its not in the parts list, it will never be in the faults list " meaning that if its not there in the first place then it cant break.
 
GTG said:
The Umnumzaan frame lock is more complex than the Sebenza. It uses two extra little balls ( no vulgarity intended ) one that meets a detent on the back of the blade when in the lock position, the other rolls along the side of the blade when opening and closing. A general rule of thumb is " If its not in the parts list, it will never be in the faults list " meaning that if its not there in the first place then it cant break.
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I thought only the Umnumzaan prototype had two detents and that the production model only has one.
 
Your probably right, I have only seen a review on youtube of the model that has both, but that does not mean to say that it is the only type available. I'm sorry if my post was misleading in any way.....
 
Maybe some of prototype model were sold or given away at one of the shows or something......
 
mechanically it's no more complex since there's no more moving parts. as for stationary parts, you might gain the ball detent in the lockbar (a detent is needed anyway for closed blade retention, so really it's not even an extra part. it's just the same part moved for two usses), but you also lose the blade stop, so it doesn't seem like a huge deal to me in terms of the number of parts. i'm probably going with the sebenza though.

edit: I think the prototypes were sold for $1000-2000 but I could be wrong. they say umnumzaan on the titanium slab (non-locking side), so that might be a way for you to tell
 
The standard production Umnumzaan I have has a single detent on the inside corner of the lock bar
that contacts the blade tang when open and locked up and also works to keeps the blade closed.
 
Your right, its not a big deal in any way. I have a large sebenza 21 with the micarta inlays and the only way I think it could be improved is if 304 stainless steel was used for spaces and screws instead of 303. They are both the same except 304 is more resistant to pitting and corrosion but 303 is easier to machine.
 
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