How to sharpen a curved sword?

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Apr 21, 2023
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The sword is slightly sharp. High carbon steel.

I have 220 grit whetstone stone. I have an angle grinder with 60,120, 320 grit flap disc.

I have ruined a knife trying to sharpen it by the the above tools.

I can't get some one else to do it.

I heard about Sandpaper tutorial but can't find a video.

A video tutorial link would be appreciated.
 
Some one here might take on the sharpening job for you....... All you can do is ask.......Worst case no luck, best case lots of dead pumpkins after Halloween😉

Post.in the Sharpening section or ask a moderator to move it for you.....
 

This one isn't bad, starting at about 4 minutes in. It's close to the way I learned to sharpen big blades. Biggest thing is to keep the angle consistent and go slow. Also mask off the blade with tape where you don't want to sharpen, and oil when done.
 
The sword is slightly sharp. High carbon steel.

I have 220 grit whetstone stone. I have an angle grinder with 60,120, 320 grit flap disc.

I have ruined a knife trying to sharpen it by the the above tools.

I can't get some one else to do it.

I heard about Sandpaper tutorial but can't find a video.

A video tutorial link would be appreciated.
You can't use flat stones on a curved blade.
Best bet to DIY is a length of 1" wood dowel wrapped with varying grits of emery paper.
 
Shortcut.................
012-ShearSharpCombo.png
 
Do I need both tools or just one?

One says it's for scissor. Other is for knives & other tools.
You need one that is meant for sharpening knives. They are available from different manufacturers and in different models, even pocket-sized.
 
This one isn't bad, starting at about 4 minutes in. It's close to the way I learned to sharpen big blades. Biggest thing is to keep the angle consistent and go slow. Also mask off the blade with tape where you don't want to sharpen, and oil when done.
He says "They're called wet stones for a reason. They work better when they're wet."

Well, no actually. They're not called wet stones. They're called whetstones. 😁 It's a much different thing. If you're talking about a whetstone that needs to be wet, then it is a water stone. Easy mistake to make. I'm guilty of it too.

I do like that he goes through the whole process that led him to where he got. It's entertaining.

He says the stick sharpener made the sword more dull. There's two issues I think he was running into. Number one is that holding a sword steady to use a sharpener like that is probably not very easy. Number two is that he was trying to take a wider angle and make it more acute. That takes a lot more time than doing the opposite, plus those ceramic sticks will take forever to re-profile an edge. This is a well known issue with that style of sharpener. If he had been able to consistently hold an angle and he had spent enough time, then the crock stick sharpener eventually would have worked.

The practical solution that he came up with is something that I have seen recommended a lot for beginners when sharpening a large knife with a small pocket stone, which is to angle the stone to the knife instead of trying to angle the knife to the stone. It makes perfect sense. Funny thing is that I'm pretty sure I've seen movie scenes where this is how they sharpen swords. I just can't remember anything specific.

edit: Also, you probably don't want a sword that can slice paper. Swords are impact weapons. They hit things and things hit them. If you have a sword edge that can slice through paper, then it's probably not a very stable edge for a sword. The first time you hit something with that sword it will probably destroy the edge. I bet that's why the sword that he was sharpening came with a wide angle edge in the first place.
 
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You can't use flat stones on a curved blade.
Best bet to DIY is a length of 1" wood dowel wrapped with varying grits of emery paper.
You must mean recurved?
Even then all that is needed is to round off the edges of a stone.
 
I've seen video of Japanese sharpening katanas sectionally, using wrapped paper to hold the blade.
 
Don't know how curved Western swords are sharpened.
But Japanese swords are sharpened on waterstones just like knives.
See from 3:25 on this video.
 
You can't use flat stones on a curved blade.
Best bet to DIY is a length of 1" wood dowel wrapped with varying grits of emery paper.
You can, in fact, use a flat stone on curved blades, whether forward or backward. At worst a forward curving blade will merely make two-point contact against the outer edges of the stone. That can be a problem for coated abrasives like diamond plates since it creates high point-pressure that can pry the diamonds out of their plating, but for conventional bonded abrasives it's not even remotely a problem.
 
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