Photos umnumzaan refurbishing (o-rings, new hardware and sharpening)

zyhano

Gold Member
Joined
Dec 3, 2009
Messages
1,593
Somehow, my umnumzaan fell apart. lost a couple of screws in the process and needed to fix it.
Ordered some at CRK (with excellent customer service) and also, put in some new tactical sound dampening o-rings that were looooong gone from my umnumzaan.
u1.jpg

Why not clean it while we're at it. This was long overdue. I know some of you will cringe at the sight ;)
u2.jpg

some copper oxide I guess (greenish).
I used some water and scrub to clean the handles and removed grease and dirt from the washers.
u3.jpg

THere were 2 nicks on the blade, one you can see located on the knife part that's on top of the handle.
u4.jpg

I used the ken onion work sharpener (without the attachment) to work on the knife. I taped up the blade to prevent accidental damage due to the buildup of grinding material on the guides of the sharpener.
I put the knife edge perpendicular on the extra coarse to immediately get rid of the nick in the blade.
I found out in the past that doing it this way makes creating a new edge a lot faster.
Below you can see the XC grind.
u5.jpg

don't remember XC/Coarse/Medium? but I'm using my trusted magnifying glass (triplet with 20x magnification) u6.jpg

this one is the result of a finer grit belt. u7.jpg

started with XC then C then Medium then Fine, then Xtra fine (which is 6000 grit, equivalent to about 3 micron according to https://www.bestsharpeningstones.com/article_details.php?id=1&article_name=Micron to Grit Conversion Calculator).

After that I used my strops with diapaste from 6 micron to 3 micron to 1 micron.
u8.jpg

Looking pretty good and shiny. a little fluorinated way too expensive CRK grease on the washer that I can now tell you lasts at least 11 years and apparantly comes for free with new knives these days :)u9.jpg

assembling everything, you can see the stains the washers left on the thinggie. u10.jpg

some more pictures in the next post
 
Apparently, I have some quality in my pocket (aaaight :P)
She's all shiny and new again.

u11.jpg

As for my tactical o-ring review: it's ninja silent opening time again. Best way to describe it for me would be: without o-rings it's fantastic. lockup is great, nothing you miss. But with o-rings, it's like you step on a qheavy uality rug, where the sound dampens and it feels very comfortable.

thanks for watching! u12.jpg
 
That is great! Now it'll be good for another 11 years?

Too cool and love the photos of everything.
:) the grease has been in use for 11 years, so I meant to say that it is still good for use. the knife has been cleaned before. it was kindof a joke since many people worry about longevity of a lot of things ;)
 
Thanks for sharing, but I gotta ask. Did you sharpen that blade while disassembled on the work sharp?
 
Thanks for sharing, but I gotta ask. Did you sharpen that blade while disassembled on the work sharp?
very sharp observation ;)
yes, I assume you mean because of the knife flying away or because of consistency of angle. I wear protective glasses when grinding
 
Last edited:
fair enough :), I thought about using pliers, but there was enough blade left to hold it properly
 
Back
Top