Survival knife ?

By now, most have probably seen all the excellent images and videos of parts of the destructive process that CPK proto test knives go through. Here's one that did it's duty and paid the ultimate price. But instead of being buried in a coffin (Nathan actually mentioned the creekbed), it was given a reprieve in order to show, through images, something of what the final product model might look like. Any questions about what you see in these images should be directed toward Nathan, who may want to comment anyway.


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Nice Bob. I'm not surprised you got a Prototype.

As far as it paying the ultimate price, looks like you can just touch up the edge a little and be good to go with a bad motherf*cker
 
That's awesome !!! Thank you for the pics !
 
Ivan,

Having handled it for the images, trust me, it's a beater. I imaged it in a way to show off the features of the model, which I understand could change a bit. But I can attest to it having been through hell and am certain you would agree, if you saw it. This is not a blade that comes back to life with a bit of clean up, LOL.

But I gotta agree with ExtraBacon, the colors are , indeed, super cool.


EDIT: Look at this one quick image. I had to delete close to 80 images just to get the ones for the thread. You gotta agree, seeing this one remaining image of the damage, one of these does not come back to life:

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I was being a little sarcastic about just a little touchup on the edge and you're good to go. At least the blade is not bent.

Still a nice proto, regardless just for display or brought back to life. Now if you could somehow get the other motherf*cker, then you'd have the set.
 
It's actually a pretty cool demonstration of being right on the ragged edge of brittle Vs ductile failure. Some cuts in a 1/2" grade five bolt did that. We were looking at the durability of the spine above the fuller during extended extremely abusive batoning (4 pound steel hammer), the primary grind geometry, point geometry and figuring out where we want edge thickness at. That particular knife was dropped on point onto concrete from about 6', cut nails and concrete did a fair bit of lateral prying out of a pine board from different depths. We have our heat treat dialed in, the blade geometry is worked out and we're just applying the finishing touches on a few ergonomic details. This one is going to be a little more stout than most of our recent work, more like the old Shiv.
 
coiledwire said:
I was being a little sarcastic about just a little touchup on the edge and you're good to go. At least the blade is not bent.

Still a nice proto, regardless just for display or brought back to life. Now if you could somehow get the other motherf*cker, then you'd have the set.



Hey, it didn't occur to me that there was any sarcasm involved. You need you up your game on that, then, LOL. I'm glad I only needed to take four shots to get that one for Edit.
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Nathan the Machinist said:
It's actually a pretty cool demonstration of being right on the ragged edge of brittle Vs ductile failure. Some cuts in a 1/2" grade five bolt did that. We were looking at the durability of the spine above the fuller during extended extremely abusive batoning (4 pound steel hammer), the primary grind geometry, point geometry and figuring out where we want edge thickness at. That particular knife was dropped on point onto concrete from about 6', cut nails and concrete did a fair bit of lateral prying out of a pine board from different depths. We have our heat treat dialed in, the blade geometry is worked out and we're just applying the finishing touches on a few ergonomic details. This one is going to be a little more stout than most of our recent work, more like the old Shiv.
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Perfect, because for many collectors, no matter what they collect, it's the history of the piece, whether it be in construction, ownership, whatever. And this ups the love for the piece.
 
Cool photos, Bob, you bad motherBEEP! :D:thumbup:

Whatever this knife is called, it's gonna be awesome!!

(Nathan, do we have a name yet?!)
 
Nathan the Machinist said:
It's actually a pretty cool demonstration of being right on the ragged edge of brittle Vs ductile failure. Some cuts in a 1/2" grade five bolt did that. We were looking at the durability of the spine above the fuller during extended extremely abusive batoning (4 pound steel hammer), the primary grind geometry, point geometry and figuring out where we want edge thickness at. That particular knife was dropped on point onto concrete from about 6', cut nails and concrete did a fair bit of lateral prying out of a pine board from different depths. We have our heat treat dialed in, the blade geometry is worked out and we're just applying the finishing touches on a few ergonomic details. This one is going to be a little more stout than most of our recent work, more like the old Shiv.
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sounds like you got some heat affected zones, (HAZ's) let me tell you all about it... ;)
 
I wasn't thinking when I named my post "Speaking of Survival". Shoulda named it "Speaking of Survivor", man.
 
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Nathan the Machinist said:
It's actually a pretty cool demonstration of being right on the ragged edge of brittle Vs ductile failure. Some cuts in a 1/2" grade five bolt did that. We were looking at the durability of the spine above the fuller during extended extremely abusive batoning (4 pound steel hammer), the primary grind geometry, point geometry and figuring out where we want edge thickness at. That particular knife was dropped on point onto concrete from about 6', cut nails and concrete did a fair bit of lateral prying out of a pine board from different depths. We have our heat treat dialed in, the blade geometry is worked out and we're just applying the finishing touches on a few ergonomic details. This one is going to be a little more stout than most of our recent work, more like the old Shiv.
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I love the lines on this will be trying for one for sure. I am really curious about how Nathan will "dial this in". Survival knives in the post Kephart era are almost synonymous with indestructibly, while Nathan's niche is in the other direction as he prioritizes "edge stability" with high hardness and accepts reasonable toughness in the balance. I know he does his homework and this should come out great.
 
Take the handles off, grind the edge flat up 1/8", then sharpen it. Then sell it to me. No need to go into the trash pile, or be used as a pry bar around the shop.

Sell it to me at a very discounted price tough
 
^^^ He could, but then again the Carothers and their kids are ostensibly more fond of the creek behind their shop / abode. So, Creek +1
 
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