Broken blade Sebenza 21! I got a knife! It looks like new!

Tagir

Tagir

Joined
Jan 20, 2015
Messages
258
Hi!
I broke favorite knife. :blue: He served me two years. I really like the knife.
Strong load did not commit. Very suddenly burst on the small side loads.
Sent the knife in Boise. Chris replaced the blade and screws (key bit hung in the screw. I read about this problem in other people).
Now I wait when Chris sends me back the knife. Repair lasted only three days! I am very happy about it!

10889014.jpg

There has been a deterioration of the frame. From which came the backlash. I hope Chris will cure it too.

10935153.jpg

Sebenza - one of the best knives in the world! :thumbup:


upd 28 Jan 2015:
I got a knife! Blade and screws new! Unfortunately frame is not repaired. :(
Watch the video. Knife develops itself. The frame does not hold the blade.
[video=youtube;XCu9-OIVu48]http://www.youtube.com/watch?v=XCu9-OIVu48[/video]

upd 29 Jan 2015:
Today parcel from Moscow will go back to Boise.

upd 03 April 2015:
I got a knife! It looks like new! :thumbup:
From my knife, as far as I knew, there was only a front plate!
Chris thanks for the support! ;)

Photos in the album «Sebenza 21», the author Gareev Tagir on Yandex.Photo

 
Last edited:
Yikes! Glad to hear CRK is taking care of you. How did the break happen?

Flippin autocorrect.
 
Last edited:
A broken blade is no fun, but interesting to see a premium knife being pushed to its' limits.

Also, interesting that the blade broke and not the pivot. This tells me that the 'smaller' pivot of the 21 is plenty strong enough, unless I'm misunderstanding something.

Thanks for sharing, great pictures.
 
MatthewSB said:
A broken blade is no fun, but interesting to see a premium knife being pushed to its' limits.
Click to expand...

Technically, it appears to have BEYOND its limits;)

I am not very surprised by where it broke (just a non-technical guess that the location shown is the most likely failure point from a sufficient lateral load).

Make no mistake, I am passing no judgment. I would guess that it required a dear bit of load to do this. I am eagerly awaiting more information regarding the event(s) prior to failure.
 
Yes...it could have had nothing to do with how he was using the blade. CRK will be able to diagnose it from the pieces.
 
Tagir,

Noticing your hometown of Moscow, I hope you are not one of my favourite online Russian knife testers from "Russian Hard Use" fame :). In the linked vid they do a number on a PM2. From the 20 minute mark it gets crazy... https://www.youtube.com/watch?v=5ED58nK6Gpc

Regardless, hope it works out for you. I recall reading somewhere or seeing a video that mentioned CRK only gets a couple broken blades a year.
 
Ok, so I had a Protech Integrity folder, with an S35VN blade. I tried to adjust the lockup and ruined the knife. So for the heck of it I decided to see what it could take. It was the same thickness as the sebenza. It took a rediculous amount of lateral load before it broke. I made a thread in a different forum. I will try to find the pictures of what it took. My point is that with Chris Reeve's quality control, I highly doubt there was a defect in the blade. It had to be abused.
 


So as you can see the blade took a pretty good bend. In the picture you can see that I had to brace me knee on thewooden post to even get the blade bent that far.

Here is my actual post...

"I have a Protech TR-3 Manual folder that I really like. Its kind of a poor man's Sebenza. Its 1/8 inch thick S35VN and I am not sure about the rockwell rating. I decided that I was going t smooth out the action on it. I polished the flats of the "tang", the washers, the pivot and the insides of the handles scales. Put it all back together and the action was much more smooth. The lockup on my knife was always early and a little sticky. feeling brave, I decided the best way to make the lock up a little deeper (and hopefully less sticky by allowing more contact between the lockbar and the tang)would be to remove some on the metal where the spine side of the tang meets the stop pin. LESSON LEARNED> this method works well, just do NOT use a grinder to remove the metal. Took what I thought was enough off. Didnt seem like much. maybe 1.5-2.0mm. TOO MUCH. the lock bar moves all the way across the tang and now there is up and down blade play! WELL F ME. Aint no putting metal back on.

I decided to do something I have never done before. Intentionally flex a blade on a really nice knife to see how much it takes before breaking. 1/8 stainless with a bayonette type grind. Figured it wouldnt take much. HOLY S was I wrong. S35VN is amazing. First I throw the knife at my fence over and over. I got some good sticks too. No chipping. Then I started throwing the point into my rocky Maryland clay dirt. No chipping but, significant dulling. Which I would expect. There were about twelve throws at the fence and twelve at the ground.

I moved to the 6x6 posts that hold my deck up. One has a nice split. I wedge the blade in about 1.5 inches. I gently pull. It doesnt even flex. I pull harder. It starts to flex. I brace my knee on the post and pull really hard. It flexes alot and I can hear wood fibers splintering. I keep pulling for a few seconds to snap the picture, increasing the tension the entire time and then let off. I go back and forth, left and right, a handfull of times. I can not break the blade. I go to a shallower crack in the wood and keep the same test going. Same result. After about 3 left bends and 3 right bends, I really lean on it and bounce. POW! It was surprisingly loud. It broke about half way between the tip and then thumbstud.

1) Avoid powertools when fitting parts with tight tolerances.

2) S35VN steel is some badass stuff. Im sure if I tried hard enough I could have broken it at the area of the blade that was full thickness, but 1/8 inch thick steel gave me a run for my money. I had to break it where it was closer to 1/16th

3) People use knives that are way to thick. 1/8th is plenty strong for any cutting task.

4) I need to buy another Protech TR-3 Integrity

5) CPM 3V must be mind blowing

6) a Bravo 1 in S35VN is probably damn near unbreakable.

7) People use knives that are way too thick. 1/8 inch thick is plenty strong for any cutting task. (That is in twice on purpose)

8) CPM 3V must be mind blowing.
 
Riz2530 said:
Ok, so I had a Protech Integrity folder, with an S35VN blade. I tried to adjust the lockup and ruined the knife. So for the heck of it I decided to see what it could take. It was the same thickness as the sebenza. It took a rediculous amount of lateral load before it broke. I made a thread in a different forum. I will try to find the pictures of what it took. My point is that with Chris Reeve's quality control, I highly doubt there was a defect in the blade. It had to be abused.
Click to expand...

One thing I can think is that when they honed out the hole for the stud (as can be seen the Blade HQ video) maybe it was slightly undersized and fitting the thumbstud caused there to be excess tension in the blade, or a small fracture. Other than that possibility, I can't imagine what might cause a sudden break like this other that some strong lateral force.

I realize there is a bit lost in translation Tagir, but maybe explain how this happened?


Thanks for the info Riz2530. I also have a bravo 1 in S35VN and that thing is a tank :thumbup:. I have whacked the heck outta that knife, and what a performer! Love it.

DSCF8336_zps020eb6fa.jpg
 
"Very suddenly burst on the small side loads. "

Sounds like tapping a pry bar

Would love to know the whole story.
 
What were you doing with that knife to break it up near the plunge line ? It might be a good suggestion that you perhaps get yourself a pry bar for next time. :p
 
Definitely do not think it broke cutting something. Other tools should be used for prying. Would be interested to hear "HOW" it broke....????
 
Thank you all for your attention to the topic.
With knives handled very carefully. I have many different knives.

My favorite five:

10942508.jpg


Testing for hard use knives I do not do.
Blade really broke from a small lateral load.

Details are very difficult to write. I do not know English so well on.
I'm afraid that you will understand me wrong.

I created the theme to share about the quality of service CRK.
At the moment, I am very pleased with the quality of service.
I was willing to pay $ 135 for a new blade and $ 18 on the new screws and plugs.
But Chris is completely renovated knife under warranty!
It is worthy of respect! I did not expect this.
 
Chris is great. Have had TONS of CRK over the years and the few times I had an issue, he was all over it. On 2 occasions, I even spoke to him on the phone about it. Now THAT is service. Awesome gentleman to talk too. Hope to make a trip out to Boise to meet the gang at CRK someday.........!!!
 
You have some nice knives. :)

I'm not surprised to hear CRK saw you right, they are truly a great company and very worthy of our support. :thumbup:
 
Nice knives Tagir. Welcome to the forum. I think the title of your thread is what is causing a little agitation with other posters. "Chris fixed my knife for free" might be a more welcome and positive thread title, but no problem. Chris himself has acknowledged that they get the odd broken blade, and the fact they offered you warranty after looking at the knife indicates to me they say no evidence of "Russian Hard Use'.

Hope you post more from Russia! How bout some pics with the local scenery!
 
Tagir said:
Thank you all for your attention to the topic.
With knives handled very carefully. I have many different knives.

My favorite five:

10942508.jpg


Testing for hard use knives I do not do.
Blade really broke from a small lateral load.

Details are very difficult to write. I do not know English so well on.
I'm afraid that you will understand me wrong.

I created the theme to share about the quality of service CRK.
At the moment, I am very pleased with the quality of service.
I was willing to pay $ 135 for a new blade and $ 18 on the new screws and plugs.
But Chris is completely renovated knife under warranty!
It is worthy of respect! I did not expect this.
Click to expand...

CRK are very good people..I have had great service from them in many respects,..So no worries. Context can be everything..given the language barrier..I think we get your intent.
 
You must log in or register to reply here.
Back
Top