Question on liner wear?

sph3ric pyramid

sph3ric pyramid

Joined
Jul 24, 2002
Messages
861
I finally got my Military back from Spyderco, and while the knife was resharpened to a beautiful edge, the liner-slippage is still there; even with a little pressure on the back of the blade, the liner will slip down toward the edge of the left-hand side of the tang (i.e. toward disengagement), although the liner will not disengage on its own. So it hasn't been resolved at all. I'm 99%+ sure that it isn't liner flex as this is with very little pressure, i.e. I can feel the liner slip under my finger as I pull the knife out of cardboard or wood.

So I'm wondering, just straight up, is this characteristic of normal wear on a liner of Spyderco's design? Is there something I'm missing?

Sent an e-mail again to Spyderco, but figured I'd probably get a faster response here.
 
Thats what mine was doing but they fixed it up and there is no slipping at all.
Did you explain the problem when you sent it in,they may have though it was just in for a sharpening.
 
Yeah, I included a letter and all describing it in detail. Dunno, the liner won't disengage on its own unless it's not engaging the tang entirely (which is pretty cool on its own), but I'm just worried about twisting the blade in any way, especially with the large cut-out on the opposing scale.

I managed to disengage it once, punching through some plastic, cutting, then trying to pull the blade out. Scared me enough to send it in, that did. I should add that I do this routinely, so it shouldn't have been overly stressful on the lock.
 
I know that on mine it only took about 2 lbs presure to get it to slip,I did not try to put much more to see if it would disengage.After I got it back it will not slip,I have it here now and I can put a whole lot of force to the back of the blade and it shows no sign of slipping.
 
By any chance are you left-handed? I had a Mili for a short time, and I really liked the knife, but as a "lefty", when I'd hold the knife tightly, the liner would move far enough over to allow the blade to move. I didn't like that, as I need to keep all of my fingers.
 
Nope, right-handed here. I have to try pretty hard to move the liner to the edge just with a white-knuckle grip, so it isn't really a problem for me on its own. I can induce bladeplay, though, in a tight grip.
 
Hi Sph3ric, I would send it back to Mike. If you explained the problem crefully, then there must have beeen a commuication break between Warrantee & Repair and the factory.

sal
 
I think I'll do that, I really would like to get the knife back to work, thanks.

Is the turnaround still an estimated 4-6 weeks?
 
sph3ric pyramid,

Does your model have the eccentric pivot pin? If so, it may just be an issue of adjusting the pin slightly. Mine has the same problem now and then, usually all it takes is a slight turn on the pivot screw to tighten things back up again. I just used as much strength as my grip would allow and I couldn't get the liner to slip. I think the eccentric pivot pin has a tendency to rotate as the knife is opened and closed over time, causing the blade to move far enough forward to allow the lock to slip. Perhaps that's why the new Military has a regular pivot?

Chris
 
You may have a serious problem. One of the parts could be out of spec and might have to be reshaped or replaced. It’s also possible that there’s an easy fix though.

It seems like liners tend to move farther to the right over time, after wear. The eccentric pivot can help adjust for that.

I think the best place for the liner to engage the tang is at the left of center. If, upon opening the knife, the liner springs to the middle of the tang, or to the right of that, then the liner is moving too far right.

When the liner stops at the left side of the tang, it’s standing up straighter. When it moves over to the right, it bends down. I think the surface of the tang is curved down at the right so it can meet the top of the liner that is dipping lower. A problem seems to be that it’s hard for the liner to stick to the curved surface, so when it goes too far right, it might slip back down the tang ramp towards disengagement when pressure is applied to the spine of the blade.

One of my Militaries started to develop a lock-slipping problem. The liner was stopping just a tiny bit to the right of the center of the tang. When I pressed on the back of the blade, the liner would slip a little towards disengagement. (You could feel the slipping easier than you could see it really. It might be described better as vertical play.)

What I did was pop out the eccentric pivot pin, rotate it one position clock-wise, then reinsert it. That caused the liner to fall more to the left on the tang and the lock-up is rock solid now. It only took a couple of minutes to do, but you have to be careful and it may void the warranty.

Check out this great post for info on the eccentric pivot pin: Adjusting the Eccentric Pivot.
 
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