Sharpening a convex knife – dull to shaving sharp
7
Feb/1025
Feb/1025
How to make a convex edge knife shaving sharp. This is a very easy to learn sharpening technique that can be used on any blade or knife.
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6:47 am on February 7th, 2010
Drawing the edge spine first removes material from behind the edge not so much the edge itself.
It also keeps the knife from cutting the sandpaper.
7:04 am on February 7th, 2010
Maybe you know, but I don’t. How come some people send the edge into the water stones, or wet and dry sandpaper?
Does sending the edge away do something different?
7:39 am on February 7th, 2010
Thanks
8:16 am on February 7th, 2010
great video!!!! thank you I learn a lot!
9:15 am on February 7th, 2010
Are you hitting the edge? Check by colouring the edge with a sharpie and see if it gets removed. It could be the edge is too thick and needs to be thinned out.
Keep going spine first like I did.
Don’t get discouraged, it will take a bit of practice to get things really sharp.
9:53 am on February 7th, 2010
Hi, i’m trying to sharpen my Swiss army knife, but effortless. Which angle you prefer, should i move the blade forward or backward on the sandpaper(like you did) It was really dull when i started to sharpen it, i tried with 180, 400 and then with 2000 granulation… But still doesn’t shave hairs:)
10:40 am on February 7th, 2010
I’m actually in the Fraser Valley but I love it up in that part of BC.
10:41 am on February 7th, 2010
great vid. nechakoriver, must be in th PG area. used your method on a couple of cheap knives, worked great. thanx
11:08 am on February 7th, 2010
do you need shaved arms where you come from?
12:05 pm on February 7th, 2010
Try an autobody store, they should have it. If your knife is really dull you can speed up the process by starting with coarse paper and working up to a finer grit.
12:54 pm on February 7th, 2010
Very impressive..Went to Menard’s Hardware and the finest grit sandpaper that I could find was 180….which said it was “fine”. Where can I get 2000 grip sandpaper?
1:05 pm on February 7th, 2010
Was it raining when you made this video?
1:39 pm on February 7th, 2010
That is what I consider dull and 2000 grit sandpaper is just fine for an edge in that condition.
2:10 pm on February 7th, 2010
this is ridiculous. OK, if you are using 2000 grit paper to start with your knife is NOT DULL … it is simply missing that “edge”
2:54 pm on February 7th, 2010
whats wrong with your hand??
3:40 pm on February 7th, 2010
I’m not sure.
If I was going to do it I would draw the knife spine first.
4:13 pm on February 7th, 2010
i see. is it the same motion you are using with the mousepad method or the traditional edge foward method of beveled edges?
4:39 pm on February 7th, 2010
It can be done but you have to be careful not to put a flat bevel on the edge.
I have never done it, but you need to roll the blade as you sharpen to maintain the convex shape.
If I really needed to sharpen my knife I would do it in a pinch but I wouldn’t make a habit of it.
5:05 pm on February 7th, 2010
practically speaking just how hard is it to sharpen a convex grind with a common sharpening stone?
5:20 pm on February 7th, 2010
well my knife shaves too
5:34 pm on February 7th, 2010
I don’t normally sharpen on a rounded edge desk like that and it kinda screwed up my technique. The tripod was also in the way too.
Using a desk or table with a squared off edge makes it a lot easier to fit your hand in without hitting it. I also normally use the strop freehand but to keep it all in frame I had to use the desk.
5:35 pm on February 7th, 2010
if i saw it correctly you did not sharpen the bottom 1/4inch. but still that is a pretty impressive job on a convex grind.
6:10 pm on February 7th, 2010
Thanks, I’m glad you liked it.
6:19 pm on February 7th, 2010
Nice – thanks!
7:02 pm on February 7th, 2010
that proves it.