Sharpening a convex grind

[bladeprince]

I just purchased a couple of beautiful Bark River knives. Now I'm wondering the best way to sharpen them. I quickly found out that my Sharpmaker does not work with a convex grind (unless someone knows a secret I don't).

I located the following link and wonder if those "in the know" agree with this technique or have other suggestions for sharpening a convex grind.

http://home.nycap.rr.com/sosak/convex.htm

Regards

 

[raoul]

Here's another convex sharpening tutorial.

It's basicly the same as the one on SOSAK,only with pictures.(works great,btw!!!)

 

[IUKE12]

If you go here you will find another tutorial. Bark River Knife Collectors
http://www.brkca.com/

 

[db]

You could use your Sharpmaker with the rods flat on the base like a bench hone. I sharpen my convex edges and blades with bench hones here is my method.
http://www.bladeforums.com/forums/showpost.php?p=4001268&postcount=1

 

[db]

Ooops double.

 

[Cliff Stamp]

I just purchased a couple of beautiful Bark River knives. Now I'm wondering the best way to sharpen them. I quickly found out that my Sharpmaker does not work with a convex grind (unless someone knows a secret I don't).

The standard Sharpmaker method works perfectly fine on a knife with a convex primary grind. The nature of the primary grind isn't of critical importance, what you need to consider is the angle at which you want to sharpen the edge. Forget about the primary grind when sharpening, just think about the edge configuration and decide on a relief and micro-bevel of the optimal angle.

If the existing edge taper works well for you and you want to keep it that way then you use the rods freehand as files or in the base as a benchstone and you match the curvature by rotating the rods or the blade with the other held fixed. The big problem here is that unless you are really careful you will tend to arc a little too heavy and over time the edge will get more obtuse so if you notice the cutting ability start to reduce then go very flat to the stone and cut the edge back.

-Cliff

 

[bladeprince]

Good stuff....thanks much.

 

[Ben Dover]

I used the mouse pad and sandpaper method to re-profile a big SRK blade and it worked beautifully. A heck of a lot of work top do a big blade like that, but at least I know it works.