Makes Me Mad!

Razor

Razor

Gold Member
Joined
Dec 8, 1999
Messages
3,975
That my sebenza won't cut like my Benchmades. I have been carrying my BM520 in the woods, on walks and while groundhog hunting. I decided to take my large sebenza the other day, because it would be lighter. The sebenza seem like it was dull, compared to the 520. The sebenza would shave hairs on my arm before I took it with me to the woods. I really like the sebenza alot, but for the price, it should cut as well or better than the 520. The 520 is flatground. Would it be that hard to make the sebenza flatground? I am not out to bash the sebenza, I just think for the price, they should cut as well as a Benchmade.
 
My two Sebbie's are the sharpest knives I own. I used my large Sebenza the other day while I was building my son's swingset. I accidently didn't cut all the way through a treated 2x6 and part of the end didn't break off cleanly. I pulled out my Sebenza and cut across the grain about 1 1/2" that was 3/4" thick and it cut like a lightsaber. Not to mention it opens plastic clampacks and opens mail like a champ.

Do you have the original convex grind on the edge or did you sharpen it?

I found that the original convex grind on my small was a bit thick and while it would shave hair it wasn't near as sharp as I wanted.
 
Truthfully, my Small Seb isn't the sharpest of the knives I carry, either. I also find it doesn't hold the edge very well. I thought it might have just been my knife, but the one I owned prior was neither particularly sharp nor did it hold the edge very well.
 
When it comes to being technical, I'm venturing into dangerous grounds but I suspect the difference in RC could be part of the issue. I think that the hardness on CRK blades are a point or two lower than the BMs. It also may be a factor of blade geometry since the 520 is flatgound.

Maybe someone who knows more about this can jump in and help you.

:)
 
I had sharpened the knife a few times, but I guess it still had the convex edge.
 
I did get a short email reply that they had received my email and would look into it. Nothing other then that.

I consider that post #52 in the link above to be their response.
 
I always regrind my Sebs to 15° per side. They seem to keep up with my Benchmade (20° per side) and Strider (15° per side) when it comes to keeping an edge. It would be interesting to see how consistant the Rockwell numbers are in a batch of any production knife maker's blades...
 
Like others here I'm not too fussed on the convex cutting edge. Also, while the high hollow blade grind is alright, cards on the table, I prefer a flat ground blade. The bulk of my folder usage is slicing and I prefer a flat blade there.

Anyway, I am a real believer in saving the blade as long as possible so I make do with the factory edge until it needs sharpened then I reprofile the edge to a higher 20° flat grind using my Edgepro. This may be a slightly weaker finish, but it's more than strong enough for me and the difference in cutting is noticeably improved.

After that when it needs sharpened, to stop wasting steel unnecessarily I strop the blade on a leather strap with diamond slurry or flitz. If the edge is blunt, after fishing for example, I would use the Spyderco Sharpmaker with the medium then fine. After the original Edgepro reprofiling, it is very easily sharpened this way.

Mark
 
i have had flat ground blades that had a bad edge when i got them and i have had reeves you could perform surgery with....IMO ...it depends on the edge...if you know how to sharpen you can put an edge on almost anything...i also believe that there are different edges for different tasks...a polished edge shaves hair well but a course edge performs better in the field.

i like my stones and free hand edges and a piece of leather glued to a board.
 
I like a crisp uniform edge on my blades. When my small classic needed resharpening, I didn't want to hand sharpen the convex edge. Used my Lansky with fine and course diamond stones at 20 deg. Had to work hard from belly to tip due to increasing blade thickness. Hollow grind doesn't follow curve of blade. I beleive this CR design feature makes for extra strong tip.
 
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