Rekat Sifu problem

E

eggzoh

Joined
Apr 25, 2001
Messages
7
I'm going to paste the e-mail that I sent about a week ago to brothers@plix.com. I haven't received a response, so I figured maybe I could get response by posting here.

Hello,

I just recevied my Sifu SE from onestopbladeshop.com. I am very pleased
with this product, but there is a slight problem that I need some help with.
Sometimes when closing the blade, the edge of the blade comes in contact
with the last stop pin. You can see a mark on both the blade and the pin
where they come in contact. I heard a remedy for this problem was to grind a
V shape into the last stop pin, but I wanted to get some advice from you
guys first.

Thanks in advance.

exotronic@outpostk9.com


[This message has been edited by eggzoh (edited 05-07-2001).]
 
I would try calling REKAT at (208)265-8858. E-mails are easy to lose, talking to a live person is much better!
smile.gif


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A Pat on the Back is only a few inches from a Kick in the Butt.
 
wow - mine BARELY knicks it tooo - looks like the blade groung out a tiny 'V' and now it barely clears - might would touch if ya slammed blade shut, will be more carefull now.......it does not mark the blade though.

i just got some work done on my SiFU last month, and didnt have probs contacting bob - that is the same EM i used by the way....

i would call REKAT, but i bet they are gonna say ship to bob - not too bad though took him 10 days total to get, fix, ship my knife back to me -

let us know how it turns out - they are good people in my experience....

vet
 
Vet -- can't see how it would make any difference, but is your SIFU the SE also, or the standard?

Am glad to see that not a lot of folks are jumping in here and saying, doggone it, mine too! If there were, I'd kinda worry that it is a design flaw, rather than a QC issue.

Am thinking about getting one from Mike, before he sells out.


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Asi es la vida

Bugs
 
There seem to be two main problems with the Sifu:

1. After a number of hard openings using centrifugal force, the rolling lock becomes misaligned so that the edge of the lock pin doesn't fully seat inside of the little semi-circular indention in the blade. Then, when you whack the spine, the lock pin slips out of the indention and the blade closes. The only possible causes that I can think of for this misalignment is that the stop pin flattens or moves/bends, or the actual pivot pin moves/bends slightly.

2. The blade contacts the last spacing pin, farthest from blade pivot. Does this problem result from forceful closings, or from the blade pivot hole being drilled a fraction of an inch off during production? Or do the spacer pins move around if the screws loosen? The blade hits another "stop pin" when closing, and this pin could also be flattening or moving/bending. For more, go to http://www.bladeforums.com/ubb/Forum22/HTML/000639.html

I just bought my Special Edition D2 Sifu with smooth handles, and I want to see what I can do to prevent these problems.

To fix the first problem, I think that you would have to take a polishing stone and slightly enlarge the indention in the blade so that the lock pin rotates fully into the indention. I think that this is what Bob Brothers does if you send in a rolling-lock knife for repair -- that's why the indention comes back shiny -- he hand fits the blade indention to the locking pin. The fear here is that if you continue with hard inertial openings, you could move/bend the stop or pivot pin. This would eventually cause vertical blade play (a less common complaint on the REKAT knives).

I have no idea how to fix/prevent the problem with the last spacing pin. If you send in a blade with this problem, REKAT just grinds and reprofiles your blade, but that doesn't tell me the cause or fix. I've been thinking about detail stripping my Sifu, but haven't worked up to it yet. I'll let you know if I figure out what causes this problem.

If the pins are somehow moving/bending, they could be replaced with better/harder/tempered steel pins. Hard openings should be expected with a defense knife. (But as a practical matter, I'll baby my Sifu until I know what the potential problems and fixes will be.)

I'd appreciate any feedback. My Sifu and Benchmade 710 are my everyday carry knives, so I want to ensure 100% reliability.



[This message has been edited by milcaztra (edited 05-11-2001).]
 
<font face="Verdana, Arial" size="2">Originally posted by milcaztra:
To fix the first problem, I think that you would have to take a polishing stone and slightly enlarge the indention in the blade so that the lock pin rotates fully into the indention. I think that this is what Bob Brothers does if you send in a rolling-lock knife for repair -- that's why the indention comes back shiny -- he hand fits the blade indention to the locking pin.</font>
Click to expand...

Please can someone tell me how far the lock pin should actually rotate into the blade? On my SIFU it doesn't seem to rotate very far at all, yet it passes the spine whack test (albeit not a very vicious one). Reading this I'm not totally sure whether it's engaging as far as it could/should now!
 

My rolling lock pin rotates just slightly into the indention. The button is 60% toward the front when the blade is closed and 80% toward the front when the blade is locked open. On my stonewash blade, when I look at the indention, it's shiny about 1/32" from the edge; so the locking pin engages about 1/32" into the indention.

This should be plenty strong under most circumstances. I just tend to be a worrier.
rolleyes.gif
I'd like to see the locking pin fully engage -- another 1/32" to 1/16" of an inch for the extra strength. From what I've read in the forum, when there's a problem with a rolling lock and when a knife is sent back for repair, Bob Brother handfits the parts so that the lock fully engages and the button moves all the way to the front.

Your lock should be plenty safe -- same with mine. I haven't read that it's prone to failure, only that it can become misaligned from hard openings.

 
Thanks for the info. I'd say our locks are roughly engaging the same amount, although there appears to be very little difference between the button position open or closed on my SIFU. I'd also like to see the locking pin fully engage as I worry about these things too.
wink.gif
I tried scratching the BlackT off the blade indent but it didn't make any noticable difference. I wonder if it's possible or advisable or even worth bothering to take the knife apart and polish it yourself?

 
Hi guys. Just received my D2 Sifu today.
biggrin.gif


My rolling lock also doesn't seem to engage very far, but a moderate spine whack or two doesn't move anything. My button seems the same (about 60% forward) whether open or closed. The blade does not touch any of the spacer pins, either.

It would be nice to have the button go farther forward, but "if it ain't broke, don't fix it." I'll keep an eye on it, though, and I'll be babying this baby for a while!

My first BIG DOLLAR knife! Well, "big dollar" to me, anyway!

Sifu's getting along with my pink Delica very well, BTW.
smile.gif


Karl

PS: Maybe there IS life beyond FRN!
 
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