What is the best way to sharpen this knife (full convex)? I normally use my Tri Angle Sharpmaker from Spyderco for most of my knives. The Sharpmaker can sharpen the F1 well I suppose if I was to use the 40 degree side of the kit, but it will make a...
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I prefer my reliable whetstone. If you are careful with the angle, you will get the edge you want. Just as an aside, one of the nice features of this knife is its ability to hold an edge, even while doing work that would dull lesser knives.
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Like all Fallkniven knives, the A1 has a convex edge. Consequently, a traditional sharpening/whetstone can be used if you employ a rolling motion on the stone. By this, I mean as you slide the edge along the stone, you would start with the spine at a rather low angle to the stone and raise it as you get to the actual edge. It's tricky. Using a typical approach to sharpening a convex edge will only damage/change the shape. The Sharpmaker will work but be careful not to over use it. The best method is to use sandpaper and strops. Use 600 to 1500 grit sandpaper (grits higher than 600 can be found in auto parts stores and are used for primer sanding). Start with the 600 on a mouse pad for cushion and carefully drag the blade across the paper with the edge as the trailing edge a half dozen times on each side. Then go to the next sandpaper grade. Maintain the same angle - no need to roll due to the mouse pad. When done, if you want a really finished/polished edge use a leather strop starting with black compound and with a different strop surface use the green. Experiment and you will be amazed.
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Not sure about the edge angle, but Amazon offers several sharpeners for ceramic knives. Check out the battery operated one by Kyocera, which will sharpen the knife to a 35 degree angle.
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With the proper technique, you can sharpen the grind on these knives using a 30 degree triangle sharpener. That's the easiest way to get the job done. However, if you don't feel like it, you can mail the knife to spyderco and they'll sharpen it for free as long as you pay the shipping. It's only $5.00, and they'll preserve the needle like tip which is one of my personal favorite features of this particular knife.
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The concave portion of the knife could not be sharpened with the system sold here. However, KME does sell an accessory that will sharpen concave curves on knives. It can be found on their site. www.kmesharp.com. It is called the Hewlett Jewel Stick 1-2-3. I have used it on several concave knives and it does a spectacular job.
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I'll answer your second question first. Yes. I use it maybe every 2nd or 3rd time I use the knife. Just a few light strokes is all it takes and there is hardly any steel removed. As for your first question its not so easy. I looked into some Global Knives and it looks like they are sharpened to a 12.5 degree bevel. This sharpener is set to a 15 degree angle. Your first time using it, you will have to use lots and lots of strokes on the 1 slot to essentially grind away your 12.5 degree edge and create a 15 degree one. Its what I did going from a 22.5 degree angle on my knives to the 15 created by this. It won't "hurt" your knife so much as change it. Although I suspect you would be hard pressed to notice a 2.5 degree change in the cutting angle.
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In my experience i'd have to say no, I've brought dull knives to a decent sharpness but not anything hair razor sharp . I'd suggest the Spyderco sharpener or something that has a higher grit to sharpen.
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I use the Lansky sharpening system and sharpen it by sections. I've also used the diamond edge "steel" to rought it in before I finished it. Works great for me!
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I cannot answer this question, as I do not know. I suggest that you contact the mfgr, if you need to sharpen it. The knife has asian characters written on it, which would lead me to believe that it needs to be angled the same as other asian knives.
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Not sure if you ever went to ask OXO yourself but since I wanted to get my knife sharpened, I did ask OXO what angle they sharpened their santoku at and they replied with 16° =)
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I use a machine called the worx sharpener. It is a small belt sharpener that has changeable blade guides it basically puts the factory edge back on the knife. The edge depends on the use intended use the smaller the angle of the edge ie 20°the sharper but this will also dull faster. So I use 25° the edge holds up longer. My knife came with a good edge on it all I have done is rehone the factory edge back to sharp. But if you get it extra dull then you will have to use a more abrasive stone or belt which ever you have on hand. You can purchase a worx sharpener online or at cabelas or bass pro I am a knife lover and it is the best product I have found to give you a easy factory edge. I use a machine called the worx sharpener. It is a small belt sharpener that has changeable blade guides it basically puts the factory edge back on the knife. The edge depends on the use intended use the smaller the angle of the edge ie 20°the sharper but this will also dull faster. So I use 25° the edge holds up longer. My knife came with a good edge on it all I have done is rehone the factory edge back to sharp. But if you get it extra dull then you will have to use a more abrasive stone or belt which ever you have on hand. You can purchase a worx sharpener online or at cabelas or bass... » Read More I use a machine called the worx sharpener. It is a small belt sharpener that has changeable blade guides it basically puts the factory edge back on the knife. The edge depends on the use intended use the smaller the angle of the edge ie 20°the sharper but this will also dull faster. So I use 25° the edge holds up longer. My knife came with a good edge on it all I have done is rehone the factory edge back to sharp. But if you get it extra dull then you will have to use a more abrasive stone or belt which ever you have on hand. You can purchase a worx sharpener online or at cabelas or bass pro I am a knife lover and it is the best product I have found to give you a easy factory edge. « Show Less
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I have a Boker ceramic knife. I did use the Duosharp to sharpen mine and it will definitely sharpen the knife. Is it the recommended way? Don't know. My instructions tell me to send the knife back to Boker to be sharpened. Brian
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I sharpened my knife using this video's techniques, and it turned out really well, imo--my first time sharpening a knife with a whetstone, and it came sharp as balls. WAY sharper than it came originally (which was already pretty good). I used a KING combo stone with 1000/6000 grit.https://www.youtube.com/watch?v=DU23vi1PcjM
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The angle is not @ 20. I believe it it 22.5. I spoke to Lansky directly. It will change the angle of your blade if used as a primary sharpener. As a touch up sharpener in the field then not an issue. However, you would need to reset the blade angle with your primary sharpener. I use the Spyderco triangle sharpmaker. Excellent.
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I use a Spyderco Sharpmaker sharpening kit for all my knives, including this one. It comes with instructions and default stones that work great.
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I use a soft mouse pad with fine sandpaper on it. Just Google how to sharpen a convex knife.
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Dear SG, I'm not very good either, at sharpening. So I bought one of the relatively inexpensive ceramic rod sharpeners. they have a plastic frame that holds the knife at about twenty degrees, all you have to remember is to pass the blade over the rod aproximately the same number of strokes for each side to keep them even. You can't really mess up to bad, just set the sharpener on a flat surface and run the blade it's full length on the ceramic rod, use aproximately the same presure on each side of blade. Not much pressure is required. You will notice as t he blade is sharpened it will get more and more shinny on the cutting edge. No oil or water is necessary on these types of sharpeners as would be on a traditiional stone.The edge you can get with six or seven passes on each side of blade should be plenty sharpe enough for the average job.Don't let the blade get too dull between sharpening as it lenthens the amount of time necessary to bring up a good cutting edge. Best of luck on it, start off with your cheapest blade even though the chances of doing any harm are small. Gary petersen