Loose Blade Stop Pin On Brand New Sukhoi 2.0

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oliveview

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May 12, 2015
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(Note, this is the same comment I already posted in a different thread, but it's getting no views nor replies, so I'm starting my own thread.)

Hey all:

I just received my new Sukhoi 2.0 (satin blade). It's my first CKF model, and I'm certainly impressed with the overall fit and finish. However, there are two things:

1) The damn thing is as dull as a butter knife. I have no idea what the usual reputation is for the sharpness of most CKF knives. Maybe this is their normal?

2) I've only had the thing for two weeks, and don't even flip it open that often. But the blade stop pin is loose. To be specific, it's loose enough to hear it rattle lightly if I shake the knife while the blade is part-way open. It seems to lock open perfectly fine, and closes perfectly fine. Is this common with ANY knife? Where the stop pin is simply a micron or two smaller in diameter than the holes in the titanium? Or will this get worse?

Thanks.
 
oliveview said:
(Note, this is the same comment I already posted in a different thread, but it's getting no views nor replies, so I'm starting my own thread.)

Hey all:

I just received my new Sukhoi 2.0 (satin blade). It's my first CKF model, and I'm certainly impressed with the overall fit and finish. However, there are two things:

1) The damn thing is as dull as a butter knife. I have no idea what the usual reputation is for the sharpness of most CKF knives. Maybe this is their normal?

2) I've only had the thing for two weeks, and don't even flip it open that often. But the blade stop pin is loose. To be specific, it's loose enough to hear it rattle lightly if I shake the knife while the blade is part-way open. It seems to lock open perfectly fine, and closes perfectly fine. Is this common with ANY knife? Where the stop pin is simply a micron or two smaller in diameter than the holes in the titanium? Or will this get worse?

Thanks.
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It is actually pretty common. Some prefer slip fit which is what your knife has while other prefer press fit. Its actually quite common and I have had several knives over the years than have that same rattle. Usually what I do is I take it apart and put a tiny dab of grease in one of the holes for the stop pin so that it can still slip if needed but not knock around and make noise. Now this doesnt mean that a knocking stop pin is always ok. I have had some knives that they started knocking because the hole that the pin fits into deforms and allows it to clack. I do find that knives produced in china have this issue more than most. But as long as the stop pin is just moving from side to side you are fine. Its when the hole is too big for the pin and it shifts in the pocket effecting closing and lockup that it really is an issue.
 
PURPLEDC said:
It is actually pretty common. Some prefer slip fit which is what your knife has while other prefer press fit. Its actually quite common and I have had several knives over the years than have that same rattle. Usually what I do is I take it apart and put a tiny dab of grease in one of the holes for the stop pin so that it can still slip if needed but not knock around and make noise. Now this doesnt mean that a knocking stop pin is always ok. I have had some knives that they started knocking because the hole that the pin fits into deforms and allows it to clack. I do find that knives produced in china have this issue more than most. But as long as the stop pin is just moving from side to side you are fine. Its when the hole is too big for the pin and it shifts in the pocket effecting closing and lockup that it really is an issue.
Click to expand...

Thanks so much for the quick reply! Yes, it really only seems that the pin is lidding laterally (perpendicular to the frame). At least at this early stage, it's not moving parallel to the blade, as the open lockup is perfect and tight, as is the closed detent - solid and tight. I think this much be the way it's designed, because the rest of the fit and finish is exemplary, as has often been mentioned about that exact knife. It truly feels like a full-custom piece - other than that slight rattle. Well...and also with the exception of the stupidly dull blade. But then again, I've had some significantly more expensive knives show up dull, too.

I like your idea of adding a little grease in that spot. If I can figure out how to properly release the awkward pivot screws, I'll do just that.
 
Some stop pins are meat to rotate in order to even out any wear that takes place. The downside to this type of design is that they sometimes rattle.
 
The rattle is normal, as others have said. My CKF Morrf does it as well. It too came very dull, I think the initial sharpness of CKF's knives has been spotty.
 
Yup rattling my Slysz Bowie as we speak with the blade half open. Like already said, dab of grease allows the pin to move (and distribute wear on the pin) but keeps it quiet. :thumbup:
 
Fantastic. Thanks to you all.
Regarding sharpening, anything seem to work particularly well, or less so, with the steel CKF uses?
 
oliveview said:
Fantastic. Thanks to you all.
Regarding sharpening, anything seem to work particularly well, or less so, with the steel CKF uses?
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S35VN has a fair amount of Vanadium (3%) and Niobium, so diamonds are preferable. But I'm sure the other synthetic stones like Aluminum Oxide or Silicon Carbide work. Is the edge obtuse in addition to being dull? That's how my Morrf came and I should have reprofiled it instead of keeping the factory angle. I had to max out the arms on my Wicked Edge to hit the bevel properly.
 
A small bit of rubber or elastic string in pin hole, will allow the pin to still spin, but nix the rattle. I have done it before. Make sure that it is a synthetic, and not a natural rubber, as mold can only grow on natural materials.
 
My CRK Morrf 2 is dull, but I have no other issues. I like it so much aesthetically, I don't even care that it's dull.
 
HST said:
My CRK Morrf 2 is dull, but I have no other issues. I like it so much aesthetically, I don't even care that it's dull.
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I could live with my new Sukhoi not being shaving sharp, but it's literally so dull that it can't cut string.
 
Mine is not that bad, but it's dull. I'd bet they'd sharpen it for you. I can't imagine they'd want an unhappy customer.

oliveview said:
I could live with my new Sukhoi not being shaving sharp, but it's literally so dull that it can't cut string.
Click to expand...
 
I had one morff arrive dull and the other really sharp. The dull one just took a quick strop and it was gtg.
 
HST said:
Mine is not that bad, but it's dull. I'd bet they'd sharpen it for you. I can't imagine they'd want an unhappy customer.
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Well, that's what I'm wondering about. I bought it from Knife Center, but I don't think this would involve them, right? So, my only recourse would be to send it all the way back to Russia, to CKF, right? Seems like a long journey. Obviously, I could take on the responsibility for sharpening it.
 
PURPLEDC said:
I had one morff arrive dull and the other really sharp. The dull one just took a quick strop and it was gtg.
Click to expand...

Hmm...I don't have enough blade science acumen to really know if something like a strop would work (I don't have a strop). I will say that, compared with many of my other very sharp knives, the inclusion angle on this new Sukhoi looks mighty small. Maybe that's not the right way to describe it?
 
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