I broke my Sebenza while opening an USPS box

Steven65 said:
I'm no metallurgist but looking at that second picture it appears that there is some strange occlusion in the centre of the blade. It appears to be on both pieces.

I'm sure that when CRK examine it they will replace it under warranty.
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Like you, I am no metallurgist but that dark spot does look suspicious.
 
Having seen this thread got me to inspect both my umnumzaan and 21 Large closely. Its a bummer to have something like this happened to your favorite knife. I have the displeasure of having tips broken on 2 occasion (not CRK) and I know the feeling very well. When the blade has been compromised it just takes abit to make it unuseable. Having said that, mechanical failure do happen. It is what it is. As it is a CRK, I am sure they will make it great again.
 
prestige said:
Quick update: CRK quickly replied with "This does look like something we will cover under warranty". The knife is on its way to CRK. I miss it already.
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When they replaced the blade on my 25 the turnaround was pretty fast, considering I mailed it right at the Christmas Holidays.

After they received it, they emailed me asking if I wanted them to do a spa treatment while they had it. No charge. Nooooooooo! That knife earned every one of those snail trails. Let them alone.:)
 
I just received my knife from CRK. The new blade looks brand new and properly sharp. They installed the double thumb lugs and also replaced the pivot bushing with both washers. The action is a little stiff for my liking - it seems to be overtightened. The lock stick is very severe - the biggest lock stick I have ever experienced with a CRK folder. I would not be happy at all if that was my first experience with a Sebenza. If a brand new folder comes with such a big lock stick I would return it immediately. It is not fun opening and closing the knife. Will see if it will smooth out with time. I may have to polish the surface on the blade where it engages with the frame lock. The blade is perfectly centered. The scales and the clip are not sandblasted and are left untouched which I prefer actually. I did not give them any instructions. This is my first time dealing with the CRK warranty.
 
Is there any oil on either the blade lockface or the lockbar lockface?
 
After an hour of playing with it my thumb is sore and I decided to disassemble the knife. All internals were bone-dry - no sign of any lube. I polished the blade lockface on a leather and a black stropping compound, cleaned and lubed with white lithium grease. The action is much smoother now but the lock stick is still pretty atrocious. I may try to touch the blade lockface with 5000 grit sandpaper later. I am not looking forward to that.
 
prestige said:
After an hour of playing with it my thumb is sore and I decided to disassemble the knife. All internals were bone-dry - no sign of any lube. I polished the blade lockface on a leather and a black stropping compound, cleaned and lubed with white lithium grease. The action is much smoother now but the lock stick is still pretty atrocious. I may try to touch the blade lockface with 5000 grit sandpaper later. I am not looking forward to that.
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You don’t want oil on the lockfaces, just in case I accidentally steered anyone wrong.
 
I can think of a few reasons it it might crack, the only one that hasn't been mentioned already is thermal expansion. However I looked at the rates and while titanium and steel have very different rates of expansion, titanium actually expands much slower so I think it's unlikely that it would cause an issue. I know it sounds silly but if you live somewhere hot and left your knife in the car for a few hours you could potentially have issues with a thumb stud swelling. I had to start storing my delrin stock in the heated part of my workshop during winter because if I kept it in the unheated area and then brought a piece in the dimensions would change as it warmed up. I'd machine a piece while it was cold and an hour later that part would be no good because it had expanded so much sitting in the heated room.
 
Less than 3 weeks and it's covered, and returned... Pretty good customer service sounds like to me. Not sure about the iffy adjustment, but seems like CRK did their best to " Get er Done"
 
I would say wipe everything down with acetone or rubbing alcohol. Blade, washers, slabs, etc. make sure both lock surface and either bar or ball (I forget which you have) is clean as well. Lube it up properly and run it.
 
prestige said:
I just received my knife from CRK. The new blade looks brand new and properly sharp. They installed the double thumb lugs and also replaced the pivot bushing with both washers. The action is a little stiff for my liking - it seems to be overtightened. The lock stick is very severe - the biggest lock stick I have ever experienced with a CRK folder. I would not be happy at all if that was my first experience with a Sebenza. If a brand new folder comes with such a big lock stick I would return it immediately. It is not fun opening and closing the knife. Will see if it will smooth out with time. I may have to polish the surface on the blade where it engages with the frame lock. The blade is perfectly centered. The scales and the clip are not sandblasted and are left untouched which I prefer actually. I did not give them any instructions. This is my first time dealing with the CRK warranty.
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I sent one of my knives to CRk with bad lock stick.
They told me it was probably because of a bad heat treat so they re-did the heat treat, problem solved. Haven't had another issue to date.
 
In regards to the atrocious lock stick. I purchased a Sebenza 31 brand new from an authorized dealer a year or so ago and it came with the worst lock stick I’ve ever seen on a knife. The blade was not centered and the detent was extremely stiff. I sent it back for warranty, it was returned in about 10 days not fixed. I sold it at a huge loss. It doesn’t seem like a super common occurrence, but it seems like it does happen
 
Silvanus said:
In regards to the atrocious lock stick. I purchased a Sebenza 31 brand new from an authorized dealer a year or so ago and it came with the worst lock stick I’ve ever seen on a knife. The blade was not centered and the detent was extremely stiff. I sent it back for warranty, it was returned in about 10 days not fixed. I sold it at a huge loss. It doesn’t seem like a super common occurrence, but it seems like it does happen
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You sent it back to dealer or to Chris Reeve?
 
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