Convex Blade Grind

Dave I · #1

How do you sharpen a convex grind without taking it to a belt sander the way they were put on by the knife maker?? I have several and so far the only way I can see is to tip the blade up so only the very edge is hitting the stone. Sooner or later the edge is going to get too wide or flatened & need some serious work. If you don't have a belt sander & know how to do it right your S out of luck unless you send it back to the maker. I think MORAN started using this grind and I know SCAGEL & a few other custom makers & very few production knife companies use it. So far everyone I ask can't come up with an answer. Anyone out there have any ideas??? Dave

vampyrewolf · #2

I've put a convex <b>edge </b> on a few knives. a convex <b>grind </b> is easiest to put on with a slack belt.

convex edge can be done with sandpaper, mousepad, and patience.

My Word, My Honour, is my Life.

Dave I · #3

Vampyrewolf, There are a lot of people out there with knives that have a convex grind. I don't have a belt sander but used to grind & polish turbine generater blades of various sizes & materials includig Titanium. On a high speed belt sander it only takes a few seconds to screw it up. If you don't keep moving the item being polished you end up with Dips, Waves & too much stock removed. I used to see a lot of guys screw up a knife blade that way. I'm looking for a way for the average knife user . Way back when Scagel made knives with the convex grind and others after him I wonder how they told customers to sharpen them ? Grinding & polishing Titanium is a story in itself. Thanks. Dave I

sam the man.. · #4

I have a Fällkniven H-1 which is beautifully convex-ground.. What a SWEET hunting knife! I have plenty of complements for the type of grind which Fällkniven uses on their blades! <img src="smile.gif" width=15 height=15 align=middle border=0>

Sam

have scars will travel..

Sword and Shield · #5

Just use fine sandpaper on a mouse pad, the padding allows the paper to follow the edge's natural curvature.

By the time you read this, you'll have already read it.

tarsier · #6

Here are some details on the technique that others have mentioned:

http://www.mhcable.com/~yocraft/sosak/convex.htm