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Forum topic by cliffslocal777 posted 243 days ago 470 views 0 times favorited 5 replies Add to Favorites Watch
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cliffslocal777

19 posts in 280 days


243 days ago

I have searched and read several posts on sharpening and wanted to confirm something.
I sharpen my plane blades similar to this

I see some folks use a tool to keep it at 25 degrees or so. When doing it by hand it will put in a natural concave shape to the bevel, which I desire on my knives.
Does a slight concave on the plane bevel cause any issues? My guess is no but I would like to just hear what other folks are doing . Thanks


5 replies so far

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Ron Harper

133 posts in 512 days


#1 posted 243 days ago

Look on youtube. paul Sellers. Sharpening. Answers there

-- Ron in Kokomo

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JustJoe

1554 posts in 633 days


#2 posted 243 days ago

When doing it by hand it will put in a natural concave shape to the bevel, which I desire on my knives.
Huh? That link goes to a pic of a guy sharpening on a stone. I don’t think it’s physically possible for you to put a concave bevel on your blade when you sharpen by hand on a flat benchstone. To do so would defy the laws of physics.
You can put a convex bevel on it with a stone, if you rock your hands while sharpening.
You get a concave bevel when you sharpen or grind on a curved grinding wheel.

In either case, some people like to have a perfectly flat bevel the entire thickness, others like to start with one flat bevel and then add a micro-bevel. Others go as far as to put a micro-bevel on the back (blasphemy I say – that’s the lazy man’s way of dealing with a pitted blade). Others like to use a grinding wheel and put a concave bevel on, and some of those people like to take the concave bevel over to a sharpening stone and put a flat microbevel. Whatever works for you, anything else is just philosophical BS used as ammo in the “my cutter is longer/fatter/thicker/sharper than yours” wars.

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richardwootton

1071 posts in 550 days


#3 posted 243 days ago

I am curious if you meant a convex bevel on the blade as well. I don’t know what the advantage to this would be, but I am curious as to what others have to say.

-- Richard, Hot Springs, Ar -- Galoot In Training

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cliffslocal777

19 posts in 280 days


#4 posted 243 days ago

Haha, I’m an idiot, I meant convex sorry. All my hunting knives have convex edges. I think it is the strongest edge for what I use them for, not sure if planes need something different though. I sharpen on bench stones then strop. I’m sure it will work fine on planes, at least it has so far. Sorry for the confusion.

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JustJoe

1554 posts in 633 days


#5 posted 243 days ago

Now that we’re on the same page with the whole concave/convex thing –
I have a couple of old mortise chisels that have convex edges. They work fine for me. You said your rounded edges work fine for you. That’s all that should matter. There are some people who get a bit anal retentive about the subject and they would probably want to cut your fingers off for suggesting anything other than two perfectly straight lines bisecting at an exact angle of their choosing. As long as you don’t invite them into your shop it shouldn’t be a problem. If you do allow one in by mistake then be aware that many of them are in the same group that can argue for weeks about laying the plane on its side or on its sole. So if you feel threatened, just put two planes on your bench – one on its sole, and one on its side. While they start to get all wound up you can make a run for the door.

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