sharpening Umnum tanto...

[Goldistheanswer]

The tanto tip on my Umnum looks to be a convex edge. (Yes I saw the earlier thread.)

But what about the primary cutting edge?

 

[din]

The tanto tip on my Umnum looks to be a convex edge. (Yes I saw the earlier thread.)

But what about the primary cutting edge?

concave.

 

[bigmark408]

If you don't have a belt sander...sand paper and a mouse pad.

 

[Goldistheanswer]

If you don't have a belt sander...sand paper and a mouse pad.

So it's also convex?

The above poster said it was concave (did he mean hollow ground???) or did he mean to say convex?

Also, is it one continous motion for the entire edge or do you strop the tanto edge and the primary edge separately?

 

[bigmark408]

So it's also convex?

The above poster said it was concave (did he mean hollow ground???) or did he mean to say convex?

Also, is it one continous motion for the entire edge or do you strop the tanto edge and the primary edge separately?

The tanto edge is not just convexed...it's convexed on a radius...the main edge is convexed and has a belly to it.....definately not for the un-experianced sharpener......the blade is hollow ground on a 10" wheel.......i have had real good luck on the slack of the belt with a high grit and leather belt.

 

[440hard]

Hand Sharpening on ceramic bench stones will usually work well on convex edges..

Hand Sharpening on bench stones usually winds up with convex edges.

-Ron

 

[Goldistheanswer]

The more I use this blade the more I like it. I've been stropping it to keep its edge razor sharp.

Great knife. It's ergos are better than the 21's IMO. Also the action is so smooth. The only thing it gives up is weight.

If you are into constantly opening and closing your folder, the umnum is a dream. Again IMO. I know some people have complained about the sharp edge on the lockbar. It doesn't bother me at all. To me,the opening and closing of this framelock is the smoothest and most ergonomic I have experienced.

We'll see how the tange and cerami ball wear. But barring a major unforseen design flaw, this is a hell of a knife. The tanto makes it a fantastic knife.