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 Post subject: Re: How To Sharpen A Reverse Curve?
PostPosted: Fri Nov 08, 2013 2:01 pm 

Joined: Thu May 24, 2012 12:20 am
Posts: 4209
"Definitely surprised by the negative comments on the recurve blades.".

It's funny, I don't think poorly of these blades, I just have developed habits in my usage and sharpening techniques such that these became decreasingly appealing to me. They look great, and I own a number of Kershaws and really love them, they just have a more traditional belly. I guess part of it is if most my blades, kitchen, utility, folders, etc, have a traditional profile, then the "manual of arms" is fairly interchangeable. When profiles get more diverse and novel I have to think more...and I'm no good at that :)

 Post subject: Re: How To Sharpen A Reverse Curve?
PostPosted: Sat Nov 09, 2013 5:07 pm 
Just made a little recurve blade out of 1095 last week (still needs a handle). It's hardened above 60 and I did try to de-temper the spine a bit as well for added toughness. So far it chops through wood just fine and doesn't seem like it would get dull for a while (the recurve portion I'm talking about). The recurve portion has a pretty thick edge, so there isn't much in the way of perceived sharpness... or really edge for that matter. It's about sharp enough to scrape across your fingernail and cut paper a bit. The edge on that portion is at least 50+ degrees inclusive, so it's very strong. (please forgive me as this was my first ever outdoor knife, I freehanded this blade for fun, but am actually impressed by its performance now for tasks like batoning through branches, I can definitely see the purpose in the recurve now.)

The edge on the front of the blade and into the curve is a little bit thinner and cuts a little better. That part is sharpened as normal, but as others have already stated, use the corner of the stone for the recurve. I'd follow what Jason said and make sure to smooth the corner first as that is often the roughest part of your stone and will have small gouges.

File comment: The grooves in the back of the handle are accidental as this was originally a scrap piece of steel that wasn't quite long enough, etc, this was more of a fun project for me.
041.JPG [ 1.18 MiB | Viewed 1119 times ]
 Post subject: Re: How To Sharpen A Reverse Curve?
PostPosted: Sat Nov 09, 2013 10:29 pm 
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Joined: Mon Oct 22, 2012 7:14 pm
Posts: 729
Location: San Ramon Ca.
Recurves can be a bit of challenge but not a real big deal to sharpen. I can understand folks just wanting to be rid of them. But thats the fun of sharpening. Making what you have better without making wholesale changes.

Pete in San Ramon
 Post subject: Re: How To Sharpen A Reverse Curve?
PostPosted: Sun Nov 10, 2013 12:40 am 
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Joined: Sun Apr 22, 2012 10:45 pm
Posts: 2796
Location: Skype k_schwartz
I use narrow stones 3/4 inch to 17 mm wide or even sharpening 'sticks' that I get as scraps from stone cutting. You can round the stone surface a bit but it's not critical as the curve of the stone surface doesn't usually match the knife's curve. You can just use the corner of a stone too.

Alternatively, using a flexible belt with reduced tension will follow a recurve nicely, preferably a narrow belt. It you are doing it a lot, slit some belts to 1/2" widths.

Really not hard to do at all. It's just like sharpening a sickle or scythe :)


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 Post subject: Re: How To Sharpen A Reverse Curve?
PostPosted: Sun Nov 10, 2013 9:30 pm 

Joined: Tue Oct 29, 2013 3:21 pm
Posts: 427
That curve is great for a mushroom knife. If you forage mushrooms I say keep it stock. You can probably just using a really course stone and grind like a mad man. Re-profile the blade as the heart tells you.

Curved blades are great for cutting wild mushrooms from the ground using the thumb pairing knife technique. Enjoy the labor. Be sure to go crazy with high polish for bragging rights.

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