Photo request - Umnum blade detent

if detent is an issue on a frame lock, the knife can be taken apart and the lock can be bent for more pressure on the detent.

Chris Reeve knives are great....thats all !!
 
STR, I humbly disagree. A larger ball/detent would mean more surface area to catch on and potential for more ball sticking out and a deeper hole which would equal better retention. Necessary/unnecessary is in the eye of the beholder's opinion. The Seb has been "improved" upon a few times over the years, and this could, and IMO should be the next step. Most people don't use their seb for anything other than knifesurbating, which, indeed is 75% of the in-hand experience mine gets. Most folks that own a seb carry it mostly due to pride of ownership, me included. Your average Sebenza owner is probably not super active, and maybe does not even carry it all that much. Keep in mind that only a small percentage of seb owners visit knife related internet forums. (I was a CRK dealer for a few years-info from CRK.) So I realize that WE are in the minority to CRK, and I am in the minority here, thus unimportant to CRK, and that is understandable for retooling cost, CNC reprograming, and the like. The sebenza is the most perfect knife on the market, all things considered. There are better aspects of other knives, but considering the total packege, the Seb is the best (IMO). To this user, the detent system could be improved on with a bigger ball/detent, and even more pressure on the lockbar. This IMO considering my carry/use of sebs since 2001. YMMV.
 
archieblue said:
...Most people don't use their seb for anything other than knifesurbating, which, indeed is 75% of the in-hand experience mine gets... Your average Sebenza owner is probably not super active, .
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Irony there being that the more active the user, likely the less active the pivot and lock mechanisms on the knife. Lol.

More negative physical effects from sedentary behavior. Go outside and do something!
 
I dropped my lg. regular sebie on the carpet the other night and the
blade popped open. Has never happened before.
Best regards, HARMON EDGE
 
HARMON EDGE said:
I dropped my lg. regular sebie on the carpet the other night and the
blade popped open. Has never happened before.
Best regards, HARMON EDGE
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I see no reason for alarm or concern in your situation. I would assume something not to be right if I dropped my knife.
 
archieblue said:
STR, I humbly disagree. A larger ball/detent would mean more surface area to catch on and potential for more ball sticking out and a deeper hole which would equal better retention. Necessary/unnecessary is in the eye of the beholder's opinion. The Seb has been "improved" upon a few times over the years, and this could, and IMO should be the next step. Most people don't use their seb for anything other than knifesurbating, which, indeed is 75% of the in-hand experience mine gets. Most folks that own a seb carry it mostly due to pride of ownership, me included. Your average Sebenza owner is probably not super active, and maybe does not even carry it all that much. Keep in mind that only a small percentage of seb owners visit knife related internet forums. (I was a CRK dealer for a few years-info from CRK.) So I realize that WE are in the minority to CRK, and I am in the minority here, thus unimportant to CRK, and that is understandable for retooling cost, CNC reprograming, and the like. The sebenza is the most perfect knife on the market, all things considered. There are better aspects of other knives, but considering the total packege, the Seb is the best (IMO). To this user, the detent system could be improved on with a bigger ball/detent, and even more pressure on the lockbar. This IMO considering my carry/use of sebs since 2001. YMMV.
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You are certainly entitled to disagree but my experience shows me otherwise. I've seen just as many big ball detents that didn't hold for crap while small ones 1/16" in diameter held way better. Why do you think that is? Kershaw is a fine example. Most all of their detents are small diameter and hold better than many much larger ones. I have one here now, a Boker with at least a 2mm ceramic ball detent in it for a lock adjustment and it holds for crap, yet my Blur with a ball slightly smaller than the ones I use on my custom folders in 1/16" holds so well that it takes a good umph to get it off the thing. If your take on it was correct that should not be the case.

Again, the size of the ball is not near as important as the way in which its allowed to work. It won't matter how big the ball is if the hole its supposed to fall in is so shallow it can't retain anything well enough to count. Its more the percentage of whatever ball size is used and how much % of it is retaining down in the hole it falls into that matters more than the size of the ball. It could be a small button head screw bigger around than any ball used and if the hole isn't set up so the head can actually fit into it well its still not going to hold well. In other words if I use a 2 mm ball and only 10% of the ball falls into the proper sized hole drilled in the blade very shallow vs a 1/6" ball that 35% of the ball is holding in a proper size for that ball diameter the smaller ball is going to retain better.

STR
 
STR said:
Again, the size of the ball is not near as important as the way in which its allowed to work. It won't matter how big the ball is if the hole its supposed to fall in is so shallow it can't retain anything well enough to count. Its more the percentage of whatever ball size is used and how much % of it is retaining down in the hole it falls into that matters more than the size of the ball. It could be a small button head screw bigger around than any ball used and if the hole isn't set up so the head can actually fit into it well its still not going to hold well. In other words if I use a 2 mm ball and only 10% of the ball falls into the proper sized hole drilled in the blade very shallow vs a 1/6" ball that 35% of the ball is holding in a proper size for that ball diameter the smaller ball is going to retain better.

STR
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I agree that mechanical fitment is more effective than friction (greater size). In order to increase the indexing resistance, you need to develop more shear at the joint, which means more mechanical engagement.

All other things equal, though, I think a larger ball would wear better. The shear plane between the ball and detent is described by a circle. The larger that circle is, the greater the available surface over which to distribute wear associated with engagement and disengagement.
 
I prefer the smaller detents normally. I only keep the bigger 2mm balls as back ups to replace one that is smaller than this in a production or custom folder that are sent to me for repairs from the tip coming up when closed to where it can catch things. Otherwise I never use them.

Generally speaking if its done right the smaller ball will not only hold quite well but can hold too well. If its a nice easy rolling blade with little surface area contacting the blade at all to drag it down combined with some nice lock cuts and a perfectly placed hole the smaller balls hold and work easy enough to please a vast majority of us makers.

STR
 
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