Absolute Proof (Sebenza Fit and Finish)

gundude73

gundude73

Joined
Oct 6, 2009
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people know that CRK knives are known for their exceptional fit and finish. but hearing numbers that quantify said F&F may be a bit confusing (not many of us can relate .0005" to something we know) i promised a friend of mine i would measure the thickness of the washers on my sebenza the next time i took it apart, i figured since i had my camera and calipers out i might as well take a few more pictures.

hopefully these pictures help understand the F&F on CRK knives.

note the fit between both the bushing/blade and bushing/female side of the pivot screw is five thousandths of an inch. :eek:

sebenza washer thickness

sebenzawasherthickness.jpg


diameter of hole drilled in the blade where the pivot pin/bushing reside

sebenzapivotinsidediameter.jpg


exterior diameter of bushing
sebenzabushingoutsidediameter.jpg


interior diameter of bushing
sebenzabushinginsidediameter.jpg


diameter of female pivot screw
sebenzafemalepivotscrew.jpg
 
FYI- Calipers are not an accurate measuring tool...You would do well to measure anything close to ±.001 repeatably with "very nears"
But I can tell you the tolerances are very tight..Have made a few parts for sebbies many years ago. :)
 
BBQ BOY said:
I have no idea what in the world I am looking at.
Click to expand...



the dimensions of the various parts that comprise a sebenza. for example the hole in the sebenza blade to accommodate the pivot screw and bushing is .2575" the total diameter of the bushing is .2570" thus there is a 5 thousandths of an inch of space between the bushing and blade. in other words excellent fit and finish


bhyde said:
FYI- Calipers are not an accurate measuring tool...You would do well to measure anything close to ±.001 repeatably with "very nears"
But I can tell you the tolerances are very tight..Have made a few parts for sebbies many years ago. :)
Click to expand...

maybe, but they accurately measured bullets when i was reloading (to the thousandth)


the title was my attempt at humor, like i said in the first post people know that CRK's have tight tolerances. these pics were meant to illustrate that tolerance.
 
Last edited:
gundude73 said:
the dimensions of the various parts that comprise a sebenza. for example the hole in the sebenza blade to accommodate the pivot screw and bushing is .2575" the total diameter of the bushing is .2570" thus there is a 5 thousandths of an inch of space between the bushing and blade. in other words excellent fit and finish
Click to expand...

According to the calipers, that's a 5 ten-thousandths-of-an-inch difference (not 5 thousandths) between parts. But like bhyde mentioned, I would not consider those calipers capable of measuring ten-thousandths.
 
gundude73 said:
maybe, but they accurately measured bullets when i was reloading (to the thousandth)


the title was my attempt at humor, like i said in the first post people know that CRK's have tight tolerances. these pics were meant to illustrate that tolerance.
Click to expand...

I meant no disrespect at all, if I came off like that, I sincerely apologize!!
BTW- I have that exact pair of calipers at work- well, 3 pairs, 6,8 and 12inch. Glad to see someone else using the same quality tools :)
 
Yeah baby - thats what I'm talking about.

I'm an engineer - so I'm all about someone actually posting with real info.

That's why I own a few CRK knives.

If you've ever had to build anything you will appreciate these tolerances.

Thanks for making the effort Gundude73!!
 
The tolerance is very impressive. I met a Marketing rep with Strider a few weeks ago when I was in California and he was even stating how impressively tight the tolerances where on the Chris Reeve knives.
 
There is a reason its the standard by which all others are judged. Even more impressive is that its a production knife not really a full blown custom. To consistently pull this kind of tolerance off as Chris does is a minor miracle in its own right. I've always applauded his efforts! :thumbup:

STR
 
Nice idea, thanks for posting. And yes, I agree-the tolerances are very impressive.
 
STR said:
There is a reason its the standard by which all others are judged. Even more impressive is that its a production knife not really a full blown custom. To consistently pull this kind of tolerance off as Chris does is a minor miracle in its own right. I've always applauded his efforts! :thumbup:

STR
Click to expand...

I may be mistaken (please feel free to correct me if so :D ) but I would expect that hitting those tolerances on a semi-production basis is probably harder than on a one-off custom basis?
 
What should be more impressive if others with calipers take similar readings...too bad mines out of batteries =*(
 
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