Umnum Lockup

thefifth

thefifth

Joined
Apr 6, 2007
Messages
1,239
I assume that lockup of the Umnumzaan should be somewhere around 50%. So I just got mine today and it is close to 100%.
Can anyone tell me if this is correct before I contact Chris Reeve Knives.
Feels really solid but I have a suspicion that it shouldn't be this far engaged.

Real fine blade:thumbup:


Thanks

UmnumLockup.jpg


UmnumLockup2.jpg
 
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I remember reading spec was somewhere between 40-60. I would def play with it a bit more before ultimately sending it in :) .
 
I personally think it's to far. Call the factory
 
not really too far I think. Imagine the point of the ball, which touches the tang - it is max in half way, somewhere in line with center of the blade. That is fine I think. It's NOT the same lock as on Sebenza, where the inner edge of the frame locks the blade.
 
Piter has made an excellent observation. The locking mechanism is different for these and we would need to compare to other Umnums.

It would look too far on a Sebenza, but these are a new breed. Call them or send an email.
 
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I have one of the protos and asked Anne about if it is ok with so much lock bar travel. On my ex is it not as much as on the one you have though. Anne told me that it was ok, but that the production knives where supposed to have less travel. So I guess that you´d better contact them and ask about it.
 
Mine does the same thing it engages almost 100 percent. Jut a newb question but why does it matter if it engages 100 or 50 wouldnt 100 make for a stronger lockup?? Just wondering thanks
 
Is that in the instance of 50% lockup vs. 100% lockup, 50% lockup allows room for wear across the tang ramp whereas at 100%, it's already either worn all the way across or was manufactured like that.

With the Unum, it's so new that who knows how the design incorporates room for long-term wear? Does it wear, ceramic vs ti vs S30V interface and all?

I can tell you this much, I've been toting my small Seb since 2002 and there has been no perceivable wear. I'm not a flicker, and I'm guessing that this has helped, though I've cut everything short of concrete with it.

Professor.
 
Perhaps you adjust for wear with the Unum by replacing the ceramic ball when the time is right, though it may wear better than the S30V of the blade tang ramp.

I, like others, have developed a flat spot on the ceramic detent of my Seb, so ceramic does in fact wear.

Professor.
 
I sent Anne a picture of my lockup bar the other day and it is 60-75% across and it is fine. Works great!
 
Im very curious about this!!!!! this way does indeed put the creamic ball dead center of the blade.. maybe this is ultimately perfect lockup, not a mistake!! anyone... anyone... ????? If thefifth doesn't reply soon Im gonna have to contact CRK myself to find out for certain
 
As I stated a few posts above, my bar goes over 60-75%, it is FINE, I spoke to Anne who is Chris Reeve's wife. It is suppose to go over further than you are use to with a Sebenza. It is perfect!
 
yours is 60-75%... his is 100%, very much different. .Soooooo who's is perfect, yours or his???:confused:
 
Ok, I understand. I took 5 pictures and emailed them to Heather at CRK and Anne called me back and said it is perfect, the way it was suppose to be.

The only logical thing I can think is for the person with the 100% lockup should take pictures and email them to CRK like I did and get the answer right from Chris or Anne. Nobody here will know the correct answer that is why I went to the source. If it is a problem CRK will stand behind the knife and correct any problem, if there is a problem.
 
hodo615 said:
Ok, I understand. I took 5 pictures and emailed them to Heather at CRK and Anne called me back and said it is perfect, the way it was suppose to be.

The only logical thing I can think is for the person with the 100% lockup should take pictures and email them to CRK like I did and get the answer right from Chris or Anne. Nobody here will know the correct answer that is why I went to the source. If it is a problem CRK will stand behind the knife and correct any problem, if there is a problem.
Click to expand...

agreed.. I'll just shut up now and wait for thefifth to chime in with his official results.
 
I guess the point to remember that locks prevent the knife from closing during use. Can't see this happening in any event. So the lock is serving it's purpose right?
:jerkit:
 
On a side note, looking at the extent of the liner in the lock up position, it doesnt look like it could move any further over the lock bar, even taking 'wear' into consideration.

Am I wrong?
UmnumLockup2.jpg
 
Ozy said:
On a side note, looking at the extent of the liner in the lock up position, it doesnt look like it could move any further over the lock bar, even taking 'wear' into consideration.

Am I wrong?
Click to expand...

The lockbar won't move any further, but the problem now is that if/when further wear does take place, since the lockbar can't move further in to compensate, that wear results in a tiny gap between the blade tang and the lockbar (or ball in this case) leading to vertical blade play.
 
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