I've been experimenting with convex edges on a couple of knives lately and wanted to try one out on my trusty standard buffalo horn A. Wright. I had a spare hour during the week and thought I'd see what I could do with my KME sharpener with the convexing rod. Well, before I got started, I realized that the edge had developed a noticeable recurve:
This is very likely because of a previous inexpert job of sharpening I did on my Tormek when I wanted to reprofile it after damaging the tip. This is a risk when sharpening a straight edge on a grinding wheel, because the middle tends to get more time against the abrasive. I was surprised that I hadn't noticed it before, but it was extremely evident. I measured it with a feeler gauge and the space in the middle is about 0.01 inches.
Well, that just won't do for—as my friend
@Cambertree would put it—Mah Knife. I had to put the project on hold, but had some time today to break out first the files and then an extra coarse diamond plate to grind out the recurve. Midway through, I used small diamond files to cut a new choil. Here it is part way through:
The blue tape, incidentally, was a tip I picked up from
@r8shell, if I recall correctly. It prevents metal filings from getting into the joint and also gives a bit of protection to the bolster.
After a bit more work with the extra coarse stone to get the edge nice and straight (and oh so blunt!) and the diamond files to finish cutting the choil, it was off to the KME for sharpening. It took quite a while to establish a new convex edge, but I'm very happy with how it turned out. It's the most even grind this knife has ever seen and it's easily shaving hair from the back of my arm.
Tomorrow evening I'll need to break down some cardboard boxes to take out with the recycling. I can hardly wait.
Have a great week folks. I hope everyone's managing to stay safe.