How do you Convex an edge?

aceofblades

aceofblades

Joined
Oct 30, 2006
Messages
974
Hi all,
Posted this here because I want to do this to my Project I, to help with bushcraft. How would I convex the edge on it?
Thanks,
Joe
 
Hey Joe,

I assume you mean sharpen for the first time. I used the two tutorials below and then practiced using the slack area (for a convex edge) of my Coote, it lies between the 10 inch and the flat platen. At this point I put convex edge on everything, the only way to go.:)

I have gotten pretty good at doing this free hand, again practice. Hope these tutorials help, they got me started.

Regards,
John Landi

http://www.mtknives.com/beltsharpening.html

http://www.youtube.com/watch?v=TLjFjT4vYsM
 
Get yourself a mousepad and some sandpaper and go to town. Start with 220 grit and work your way up.
 
hit it with the belt grinder (KMG rotary platen works best) and then flatten the transition out a bit with a finer grit belt and some......make that LOTS of hand sanding. Bill Moran did his convex grinding freehand on a platen and vertically on a big contact wheel because he said that a slack belt made the blade too convex. You can end of with the midline of the blade being as thick or possibly thicker than the spine. I flat grind my blades down to the thickness I want for HT and then do the convexing afterwards.
 
If the knife youre working on has a fairly obtuse bevel to begin with, you'll want to grind down that shoulder of the bevel on a fast cutting stone before you go to the mousepad.
 
This link has photos of some of the hones I use. The field hone in the article was made and used by me. I still like the small, lightweight, cedar block mouse pad/ leather strop combo field hones in the bush. In the shop, I will either use the slack-belt , or a larger mouse pad affair with wet/dry.
http://bill-hay.com/Convex/Convex.htm
 
Fiddleback said:
Get yourself a mousepad and some sandpaper and go to town. Start with 220 grit and work your way up.
Click to expand...

yep! I use this exact method and it works like a charm. I have even convexed all my folders. LOVE IT!

come to think of it, you might have given me that advice FB?

It's so easy and it's cheap as dirt.

Brett
 
When I was but a wee lad, my grandfather had an old folder that was always in his pocket. He had used if for so long that the blades were maybe 60-70% of their original width. So as you can imagine, he had to do a fair bit of reprofiling over the years. My recollection is that the blades were rather thinned out and convexed and he was able to do that on a regular small whetstone using the old school circular motion. And the sucker cut!
 
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