Oops!

Looks like it may have been already cracked. Looks like oxidation around the upper part of the hole.--KV
 
Glenn Goodlett said:
And, something looks funny in your photos. Both of the blade cross section photos are a little out of focus, but, the metal adjacent to the treaded portion of the hole looks darker. Like maybe it was already cracked.
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Glenn was quicker than I was.--KV
 
vwb563 said:
It's not advisable to pry with any knife and definitely don't pry with any knives with a drilled spine used to mount a thumb disk. Apparently it causes a very weak point in the blade and allows a place for a stress fracture to start.
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Bob Terzuoa's flagship ACTF has a thumbdisk and he set the benchmark for tactical knives over 25 years ago. His are drilled in the middle, blade is thicker and use a better steel with a heat treat and testing. Thumb disks are great.
 
Glenn Goodlett said:
And, something looks funny in your photos. Both of the blade cross section photos are a little out of focus, but, the metal adjacent to the treaded portion of the hole looks darker. Like maybe it was already cracked.
Click to expand...
That's very possible. I saw what you're talking about. It does look odd.
 
Send it to Kai. They will do right by you.
I'm not going to guarantee they will replace it, but I would say your chances are over 95% that they will.
Well worth the small effort and shipping cost IMO.
 
NorthernSouthpaw said:
Send it to Kai. They will do right by you.
I'm not going to guarantee they will replace it, but I would say your chances are over 95% that they will.
Well worth the small effort and shipping cost IMO.
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At first I wasn't considering sending it in since what happened is purely my fault. But I may end up sending it to them with a full explanation of what happened. If they replace it I will be happy but I'd rather them at least see how the hole was drilled. Maybe they're not aware of how the Chineese manufacturer is making these knives.
 
Pretty clean snap. Too bad you don't have enough blade left to resharpen it into a Razel.

Also for the people talking about the deep hole, I don't see why it's so deep if the threads are that shallow why not just drill it to depth? It would save time and money on Kerhsaw's end.
 
vwb563 said:
At first I wasn't considering sending it in since what happened is purely my fault. But I may end up sending it to them with a full explanation of what happened. If they replace it I will be happy but I'd rather them at least see how the hole was drilled. Maybe they're not aware of how the Chineese manufacturer is making these knives.
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Just for curiosity sake, I wanna hear what they say.
 
Dan of Bazz Clazz said:
Edjumacate me on this one.
Is that thumb disc mounting hole off center for a reason? Would think that could unduly weaken the blade.

Out of curiosity. Any chance you were applying pressure to the thumb disc while you were prying?
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vwb563 said:
I have no idea. The off centering is a goof up I'm sure but the depth of the hole is ridiculous compared to how deep it needed to be. Both the off centering and hole depth added to blade snapping so easily. I guess the ole say "You get what you pay for" applies in this situation.
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Disclaimer: I love Kershaw and carry a Blur On a daily basis.

I looks like the wall of that hole is almost transparent. Lol. Like many have said send it back citing this as the flaw its worth a try.
 
Hey, look on the bright side, with a little bit of grinding, you can turn that stub into a floor scraper. :)
 
DocJD said:
OP , yes please do let us know about Kershaws CS response !
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Will do. I've been so busy the past few days I haven't had time to get it back to them. I'll try to get it sent this coming week and will post the outcome.
 
Stress risers and should haves and shouldn't haves.
Let me toss a couple of stress riser breakages into the mix.
You all recognize the big swoopy thing right ?
And below it is my Opinel #12 that I bought with the full intension of shortening the blade exactly as it is now.
IMG_5353.JPG
IMG_3340.jpg

So the bicycle racing handlebars are some of the best in the world (thirty five years ago). The stem that they were clamped in WAS the very best in the world but . . . I didn't like the shape of the Italian bars by that manufacture and much preferred the Japanese handlebar shape shown. They were incompatible size wise. What do we do right . . . ?
Shim that sucker. So I put a very thin steel shim in there to make up the diff and tightened 'er down. Then I rode the bike almost daily for thirty five years mostly on fairly rough city streets. This is my custom made commuter bicycle designed and built by me (I built the frame) to ride in the city to work and back.

Then one day as I'm rolling up a gentle curb cut to the entrance of my bank I felt a thunk and the left side of the bars bent down. Guess that's the end of the road. Right ?
Nah I rode it home. One hand on the stem and the other on the bar so I could brake (stop).
Note all the serrations (knurling) so the bar clamp can get a grip. Handlebars just never ever fail at this point and most all bars have these serrations.
IMG_5354.JPG

It has yet to snap all the way off and I have carted it around and shown it to some mechanics and engineer friends that like stuff like this.
The problem was the shim was too narrow and was up in side the clamp for the handlebar. Probably if I had made it full width of the stem (clamp) rather using the first thing that fell to hand I would still be riding my favorite shaped bars rather than the goof things I replaced them with.
Oh well . . . live and learn . . . and try not to do too many face plants in the learning . . . thirty five years was a good run !

Now the knife.
I intentionally cut a nice deep slot all the way across the blade intending to easily snap the extra length off nice and neat right at the slot (blatant stress riser).
The knife had other ideas and broke for the most part other than at the slot.
AND
it was FAR from easy to break it off ! ! ! !
IMG_5356.JPG

See the next photo where I tried to reenact how far I had to bend the blade over. I even went further than this each time . . . the blade making a nice bowed shape . . . waaaaaaaaayyyy over and right back up to perfectly straight. It never even kinked ! After about four or five tries each more extreme than the last the blade was still straight ! ! ! !
Finally about the sixth try way over maybe past 90° it broke off.

Look how thin that blade is !
That's an $18 knife designed to take on pick nicks.
One would hope the thick "tactical" tool of mayhem and destruction this thread is about could best it. Without a slot cut all the way across the blade no less.
Lesson there : going on an important mission ? Leave the Kershaw at home for pick nicks and take the Opinel into the unknown ?
I'm just saying.
IMG_5358.JPG
 
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I don't know, but you sure took it well. :cool: :thumbsup: It reminded me of T.Eldelyi or some such, where the heck has he been? o_O And, while I'm at it, what about RevDevil? :(
 
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