Yojimbo 2 defect

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ulyan
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Yojimbo 2 - trouble with opening

#1

Post by ulyan »

I am the proud owner of this knife since last two months. It is a wonderful blade, thanks to it's creators - Michael Janich and Sal Glesser.

But there is one unpleasant moment - when you open the knife it's lock clings the skin on the index finger. Looking the same lock on Para-military2 I understood the reason of this problem. On Yojimbo2 there is no distance between the compression insert and liner but on Para-military2 it is 2-3 mm.

See photos:
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Michael Janich
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#2

Post by Michael Janich »

Dear Ulyan:

Thank you for your post. The "pinch" of the Compression Lock occurs when the lock bar moves away from the blade as the blade is opened. This is caused by the detent ball in the liner moving out of the hole in the blade. The solution is to not press your index finger against the lock when you open the knife.

My method of thumb opening folders is based on what I call a "Filipino grip," but is actually the grip you'll find in many other knife systems, including the Japanese methods. Grip the handle tightly with the middle, ring, and little fingers of the hand and leave your index finger loose. The last three fingers of the hand are the strength of your grip and will hold the handle firmly--especially if you curl them around the clip.

The wide blade of the Yo2 creates different engineering challenges than the Para2. I actually asked that the lock bar tab be shortened (to bring it further below the edge of the scale), but the engineers felt it would make the knife too difficult to close. I'm sure if you adjust your technique a bit, you'll have no problem avoiding the pinch.

Stay safe,

Mike
Michael Janich
Spyderco Special Projects Coordinator
Founder and Lead Instructor, Martial Blade Concepts
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ulyan
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#3

Post by ulyan »

Thank you for such prompt reply!

I understood about "Filipino grip" at once, no problems with that. But when I open the knife it captured by three fingers, lies on the index finger and the thumb gets into a SpyderHole and opens it. The knife is held horizontally and after opening I give it in vertical position and put my thumb on the back of the blade.
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#4

Post by HighDesertSpyder »

Adapt a new style and overcome. Unique knives sometimes require a unique technique to manage and deploy.
This is most certainly NOT a defect by any stretch of the imagination whatsoever.
Please rename the post: Having trouble opening my awesome new Yojimbo 2 ;)
:spyder:74:spyder:
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#5

Post by Evil D »

I'm not sure i'm understanding the issue here. Is the the old "lock tab pinches my finger when i open the knife" issue? If so, welcome to the joys of owning a compression lock. That pinch is more a result of how far the tab travels to engage the tang and lock, than it is anything else. My Yojimbo 2 pinches my finger way more often than my Para 2 does.
~David
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Cheddarnut
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#6

Post by Cheddarnut »

HighDesertSpyder wrote:Adapt a new style and overcome. Unique knives sometimes require a unique technique to manage and deploy.
This is most certainly NOT a defect by any stretch of the imagination whatsoever.
Please rename the post: Having trouble opening my awesome new Yojimbo 2 ;)
Apple Computers success is largely due to making their products people proof, if they blamed the consumer for using their computers wrong i doubt they would be enjoying their position in the market.
As for titles, thats up to posters to decide, not readers. If its truly an issue i believe there would be swift administrative intervention.
"...is cabbage a better blue than cars that sing?" C.S.
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Evil D
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#7

Post by Evil D »

Cheddarnut wrote:Apple Computers success is largely due to making their products people proof, if they blamed the consumer for using their computers wrong i doubt they would be enjoying their position in the market.
As for titles, thats up to posters to decide, not readers. If its truly an issue i believe there would be swift administrative intervention.
This reminds me of the old 1911 thumb webbing slide pinch issue. You just have to learn to not get your hand in the way of the slide. 101 years and that same model is still being produced and used by millions. Not all designs work for everyone, but that doesn't mean it's the design's fault.
~David
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gbelleh
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#8

Post by gbelleh »

Maybe Ed Brown could start making Yojimbo beaver tails?
:bug-red-white
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Evil D
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#9

Post by Evil D »

gbelleh wrote:Maybe Ed Brown could start making Yojimbo beaver tails?
Hmmmmm....lol
~David
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#10

Post by 00max00 »

Evil D wrote:This reminds me of the old 1911 thumb webbing slide pinch issue. You just have to learn to not get your hand in the way of the slide. 101 years and that same model is still being produced and used by millions. Not all designs work for everyone, but that doesn't mean it's the design's fault.
Haha, guess what, that's exactly why better 1911's all have beaver tail grip safeties. Products evolve to get better, and consumers buy better products.
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#11

Post by v8r »

gbelleh wrote:Maybe Ed Brown could start making Yojimbo beaver tails?
Word.......Loose Nut behind the steering wheel? ;) Never had a compression lock pinch me?
V8R



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#12

Post by The Deacon »

Cheddarnut wrote:Apple Computers success is largely due to making their products people proof, if they blamed the consumer for using their computers wrong i doubt they would be enjoying their position in the market.
As for titles, thats up to posters to decide, not readers. If its truly an issue i believe there would be swift administrative intervention.
Bad analogy. This is more like calling midlocks that cannot be thumb flicked open "defective". The fact that one knife with a particular lock, or even several knives with that lock, can be opened a particular way does not mean they were designed to be opened that way.
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Blerv
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#13

Post by Blerv »

Sometimes it just takes a bit of a grip change too, your hand is pretty good at adapting once it gets pinched a few times.

It's probably not qualified as defective unless you're getting blood blisters from the pinch, everyone is complaining about it, or the lock isn't holding the blade open.
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Evil D
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#14

Post by Evil D »

00max00 wrote:Haha, guess what, that's exactly why better 1911's all have beaver tail grip safeties. Products evolve to get better, and consumers buy better products.
Be that as it may, the original model still endured for 100 years. You can't deny that. I really don't think the compression lock pinch can be evolved away, it just is what it is. The only way i can see it being "fixed" is if the cutout was much much larger, and then you'd have a portion of the edge exposed.
~David
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chuck_roxas45
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#15

Post by chuck_roxas45 »

Evil D wrote:Be that as it may, the original model still endured for 100 years. You can't deny that. I really don't think the compression lock pinch can be evolved away, it just is what it is. The only way i can see it being "fixed" is if the cutout was much much larger, and then you'd have a portion of the edge exposed.
I'm guessing it endured for that long because there were few better. Doesn't mean that things can't be improved upon. :)
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#16

Post by Evil D »

chuck_roxas45 wrote:I'm guessing it endured for that long because there were few better. Doesn't mean that things can't be improved upon. :)
No it certainly doesn't but wouldn't you think that over the course of those 100 years someone would've invented the beaver tail 90 years sooner if it was THAT big of a problem? ;)
~David
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#17

Post by chuck_roxas45 »

Evil D wrote:No it certainly doesn't but wouldn't you think that over the course of those 100 years someone would've invented the beaver tail 90 years sooner if it was THAT big of a problem? ;)
I wouldn't really call it a problem, more of an annoyance that you could work around. Still, you'd rather not have an annoyance. Kinda like if you could have a comp lock that doesn't pinch. ;)
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#18

Post by ulyan »

Evil D wrote:My Yojimbo 2 pinches my finger way more often than my Para 2 does.
I don't have this problem with Para-military2 and other knives with compression lock and so write this post.
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#19

Post by ulyan »

HighDesertSpyder wrote:Please rename the post: Having trouble opening my awesome new Yojimbo 2 ;)
I already knew that this is not a defect but the problem that occurs is not at all. Your proposal is quite justified :D
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ulyan
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#20

Post by ulyan »

Also one question to Michael Janich:
I've seen drafts of Yojimbo's prototypes with a Ball Bearing Lock. Did you consider it when designing Yojimbo2? I think this lock is enough strong and making this knife truly ambidextrous.
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