Concentric stop pin on a Sebenza?

Barry H

Barry H

Joined
Nov 3, 1999
Messages
1,699
I read, on another site, that the stop pin on a Sebenza is concentric. That's news to me. Can anyone document that if it's true?

Thanks!

Barry H
 
I read that also, on this site. I do not believe the stop pin to be concentric or oval. I believe the pin is round. CRK says the pin can be adjusted for wear. So if it wears a flat spot and the blade does not lock up tight, you can simply rotate it to an unworn spot. Just my belief; can't base it on anything official from CRK.
 
Im pretty sure its round, and if someday it wears a flatspot simply turn it a few degrees and it locks up like new.
 
"concentric" :confused: do you mean "eccentric" ? My stop pin looks round. BTW I read somewhere on BF that the washers were stainless, but when I took my sebenza apart they were brass colored - so are they stainless or brass?
 
Concentric is oval with two centers, eccentric is round with an offset center. The Sebenza is neither. I believe it is round with a true center. I also believe the washers are neither brass nor stainless; but are actually bronze.
 
Sorry, but I still don't know what is meant by "concentric" stop pin. still :confused: Anyway I agree with you that the stop pin is round with a true center. Thanks for the information and about the washers being bronze too
 
metallicat said:
"concentric" :confused: do you mean "eccentric" ? My stop pin looks round. BTW I read somewhere on BF that the washers were stainless, but when I took my sebenza apart they were brass colored - so are they stainless or brass?
Click to expand...

Webster's defines "eccentric" as " a mechanical devise consisting of a disk through which a shaft is keyed eccentrically and a circular strap which works freely round the rim of the disk for communicating its motion to one end of a rod whose other end is constrained to move in a straight line so as to produce reciprocating motion."

Webster's also defines eccentric as not having the same center.

Concentric is defined as: (1) "having a common center <~ circles>, (2) having a common axis: COAXIAL.

I'm not a math guy or a mechanical engineer, but it would seem to me that the Sebenza's stop pin is not eccentric or concentric, but is round. I can percieve that if some one flicks his Sebenza (or any other folder) it may eventually flatten out the contact point on the stop pin, thereby affecting the lock-up.

Would love to hear from Anne or St. James on this one.

Thanks,
Barry H
 
BoySetsTheFire said:
Concentric is oval with two centers, eccentric is round with an offset center. The Sebenza is neither. I believe it is round with a true center. I also believe the washers are neither brass nor stainless; but are actually bronze.
Click to expand...



I have owned many different Sebenzas and have hard all apart to re-lube
Just wanted to confirm that the washers on Sebenzas are phospher bronze.

Barry H
 
:D let me try this one more time - what are the "two or more circles having a common center"? or perhaps someone can point me to the article that started this thread? When I took my Sebenza apart the stop "pin" looked like a round bushing with a centered hole (in other words one circle/round). It fits over, and is held in place, by a round pin and screw.
 
The stop pin is round and centered, neither concentric or eccentric, etc. Mr. Reeve told me that to "oversize" the stop pin, or similarly by allowing for the type of adjustment that we think to be simple, would adversly affect the lockbar/tang engagement. It would change the angle of the blade tang altogether.

I may not be paraphrasing correctly. Chris has a way with making the complicated very easy.

Professor.
 
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