What is the point of this notch?
What is the point of this notch?
What is the purpose of this cutout in the PM2 tang? Where the red arrow is....(this is not my knife btw)
Because mine looks like this and isn't a nice straight clean edge. Will this effect anything?
Right now it doesn't seem like it does. Just making sure. Yes this goes along with another thread I had.
Thanks!
Because mine looks like this and isn't a nice straight clean edge. Will this effect anything?
Right now it doesn't seem like it does. Just making sure. Yes this goes along with another thread I had.
Thanks!
Re: What is the point of this notch?
I'm thinking that's the ramp for the detent ball?
All SE all the time since 2017
~David
~David
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Re: What is the point of this notch?
Looks like it's a fillet to eliminate the stress concentration that would otherwise be present there.
Re: What is the point of this notch?
Hard to tell, I can't really make out where the detent path is, it looks like it wouldn't be centered with the detent hole and it looks a little small but I'm not sure what else it could be, It could be a random leftover related to laser cutting. I've made similar ramps myself on several compression lock and liner lock knives.
All SE all the time since 2017
~David
~David
Re: What is the point of this notch?
I'm clueless at this point concerning that notch. Because I rarely ever take apart any of my Spyderco blades. However I do like the USA made Spyders that are most easy to take apart if I would ever find a need to do that. I've just had so many Spyderco models over the years and I've been fortunate that I haven't really experienced any significant failures. For instance I've never had any of Spyderco's locking systems ever fail on me. Regardless of which type of locking system it is.
I tend to go with the old philosophy "If It Ain't Broke Then Please Don't Try To Fix It">> that philosophy has worked for me all my life.
I tend to go with the old philosophy "If It Ain't Broke Then Please Don't Try To Fix It">> that philosophy has worked for me all my life.
Re: What is the point of this notch?
If the blade lockup is good I wouldn't mess with it.
Re: What is the point of this notch?
I'm no expert, so take this with a grain of salt. Could it possibly be part of the design to absorb or reduce stress along that radius?
Jim
Jim
Re: What is the point of this notch?
hereiamu1 wrote:If the blade lockup is good I wouldn't mess with it.
Yes I know it's not "normal". I made a thread on this a few days ago...just trying to figure out what the notch is for...
Could be. Maybe Sal could chime in?James Y wrote: I'm no expert, so take this with a grain of salt. Could it possibly be part of the design to absorb or reduce stress along that radius?
Jim
Re: What is the point of this notch?
Took a look at a few of my compression lock models (PM2, Para3, Yojimbo2, and Lil Native) and they all have that relief cut. I agree with others that it's likely for stress relief as the flat surface above that cutout is one half of where the compression lock is compressed between. The other half being the stop pin.
Re: What is the point of this notch?
I suspect the flat surface is finished separately, toward the end of assembly, to create a perfect lockup. Reliving the area behind the lock surface allows easier final finishing.
Re: What is the point of this notch?
I believe it’s a channel for debris to accumulate instead of effecting the lockup. It’s not a defect, all 4 of my paramilitaries have this.
Last edited by Dodge on Sat Jan 21, 2023 6:44 pm, edited 1 time in total.
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Re: What is the point of this notch?
It's a channel for collecting the power from dark matter to increase edge retention.
Because desolate places allow us to breathe. And most people don't even know they're out of breath.
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Re: What is the point of this notch?
Of course they all have it haha, I'm questioning mine...which looks nothing like other PM2s, the bottom is real rough looking. Was wondering it mattered, that's all.
Re: What is the point of this notch?
Technically speaking yours has more mass and is structurally more sound!! It it bothers you I’m sure you could take a razor blade and knock off the burr.
Flash Batch request: Flat Iron Salt (CE w/ yellow FRN)
New knife request: Police 4 Salt!!!
“Don’t be so open minded that your brain falls out”
New knife request: Police 4 Salt!!!
“Don’t be so open minded that your brain falls out”