‘Scary Sharp’ Sharpening Method Used to Sharpen Murray Carter 10sun Gyuto
hi everyone! first off, this video is less of a tutorial and more of a demonstration. it didn’t totally turn out the way i wanted it to, but it is what it is. secondly, murray carter makes amazing knives and this one is one of my favourite knives to use. ok, so i’m sharpening a wide beveled murray carter gyuto on the scary sharp system. the scary sharp system basically started out as sharpening on sand paper. now we have 3m micro film to play with, and it comes in an array of grit sizes ranging from 80 micron down to .3 micron. now, this video shows how a wide beveled knife is sharpened. knife makers like takeda, moritaka, yoshikane, shigefusa make gyuto’s, nakiri’s, santoku’s and other knives with big grinds, and this is how i personally sharpen them. i usually don’t use the scary sharp system to sharpen these knives, but for some unknown reason, i felt compelled to. i originally wanted to sharpen a cleaver on it. HOW TO USE SCARY SHARP SYSTEM: ======================================== ==== ok, so how i usually sharpen with these papers is very similar to how i use japanese waterstones. i move up the grit ladder until i’m finished polishing the knife. simple. typically, i’ll count the number of strokes i make on each side of the knife so that there’s an even grind on both sides. usually i’ll start out with 15 strokes on each side, check for burr. (if there isn’t then i’ll do 15 strokes on each side untill there is.) if there’s a burr then i’ll go 13 on each side. then 10 …
Video Rating: 4 / 5
I just got some Microfilm in various grits. The 15 micron says what it is on the back of the paper. But there are yellow and white pieces of paper that are not marked. I assume the yellow is 1 micron and the white is .3 micron? Correct me if I am wrong. Thanks.
@eceipretsam Do you find that it is really necessary to microbevel the knife? What performance characteristics do you think would differ, if you just treated it like a scandi edge, single bevel blade? I just recently reprofiled my KA-BAR to a zero grind scandi edge for better wood processing, and was able to get it sharp enough to shave my face after honing with my shaptons (though admittedly I did get some razor burn on my left cheek). Do you find that the microbevel aids in edge retention?
@eceipretsam I see. Could you please provide a bit more detail on how you prepare the micro bevel, I don’t want to blunt my knife after all the polishing! Great videos btw, I’ve got a reference glass and plan to source some lapping film.
@awhtjio no. when setting the microbevel, you don’t even start the microbevel until you’re polishing. that means at 5 micron paper or on japanese stones, 3000 – 6000 grit stone. you don’t want the stone or the paper to be so aggressive that it’s removing a lot of metal. you just want to slightly strengthen the edge of the edge.
When you are preparing the micro bevel, do you do the same number of strokes as the bevel for each grit? ie 15 13 10 9 etc?
@pianotuner101 i’m glad i was able to help! the granite reference block is a very useful tool. thank you for watching!
Well, I finally got the 12 X 12 X 2 granite reference stone that is been honed to .0001 inch. I haven’t used it on paper sharpening yet, however, I have used it to flatten my stones by using 100 grit sc wet/dry and I must say that the results were immediately apparant. The stones are dead flat and even tend to have a vaqcuum to the paper, making it necessary to take care in taking off the stone. For flattening stones this reference plate is a must-have item. Glad you responded to my emais.
I dedided to buy the granite reference block. I want a perfectly flat surface and I figure it’s tuition well spent. Meanwhile I did find a 1/2 inch piece of float glass; 12 x 18 that will get me by until the reference stone arrives. I know I will be much happier afterward. Thanks for your helpful hints in the meanwhile. L.
Great video – Where can I order the 3M abrasive down to 1 & 3 Microns????
@MaxIsSoHungry Yes, a convex edge is going to have a greater friction coefficient than a flat bevel; but the convex bevel is going to give you better edge reinforcement, and therefore better edge durability. In addition, the angle of the convex edge, in addition to the harshness of the convex edge transition will also effect friction resistance while cutting. Unless you have a convex edge with a very very shallow, slow transition to the edge, cutting the paper in the air is going to be very hard
@pianotuner101 float glass is similar to plate glass. glass is usually pretty flat no matter what it’s called.
if you got that granite slab, just stick to it. when you use the microfilm on it, just look at it while you sharpen. as you sharpen, you’ll see darker spots. that’s where the film is removing metal. if there are a lot of hollow areas, that’s where it’s either uneven (unflat) or where you have air bubbles.
@eceipretsam Hello again. I have one more question. What are you referring to when you say “float glass”? Is plate glass similar? Thanks.
@eceipretsam Thank-you for answering my question so quickly. I understand now what you are talking about. A granite reference block would ideally be the thing to use. What I got were leftover pieces of granite from countertops that they basically gave away to me.I will visit the company and ask if they can get me a granite reference block, which I will be more than happy to pay for. I did visit the toolsforwoodworking and I probably will be buying some micro film from them.
@pianotuner101 but the answer is no. don’t try to flatten it. yes, it’s mostly flat enough. you’re not missing out that much if it’s not perfectly flat.
a lot of people use float glass instead of granite, but i prefer granite.
thank you very much for watching my videos. i’m very happy that i can be helpful!
@pianotuner101 see, the question i have for you is this: the granite you got… is it a just a piece of granite or is it a ‘granite reference block’?
the difference is that the piece of granite, although it is visually flat, the ‘granite reference block’ is designed to be used as a flat reference.
if it’s not a reference block, the granite is still ok as long as it’s mostly flat. when using microfilm, the flatter the better because of more surface contact with the knife.
Very impressive video! Question: I got a piece of granite from local cabinet making shop. Is this generally flat enough or can I get it flatter by rubbing two piece of granite together or a similar technique? Thanks again for this video which I have watched at least 20 times now.
@killerkowalczyk i got the granite reference block at my local woodworking shop for about $35 five years ago. the 3m microfilm was ordered from ‘tools for working wood .com’. they have a sampler pack.
where did you get the granite slab, and where did you get the 3m Microfilm? Thanks.
@eceipretsam Nice vid, what is the music called?
@eceipretsam Hey, Thanks for the advise, making convex edge is really hard when the angle is not right =X anyway, just to update that i’ve sorta completed the sharening except that i don’t have a 0.3 micron , i only got a 0.5 micron lapping film,(thanks to the sales rep at 3m Malaysia). and i kinda can’t seem to do the cut the paper in the air trick =p is it because mine is a convex edge and yours is a double bevel? I want to cut paper in the air~~ XD anyway, hope to hear from you, thanks!
holy shit! awsome video. ive only been able to find 2000 grit sandpaper to sharpen my knives so where can i buy this micron film?
OK, at risk of seeming like an idiot, what is microfilm?
@MaxIsSoHungry when doing any kind of sharpening, you have to keep your angles and hand position in mind. just keep in mind what you’re doing, what your hand is doing and what’s happening to the knife : )
have fun!
Great method!!! i’m using this method of yours in conjunction with convexing to get the best of both worlds, do you have any advice for me before i start my project? =p
@eceipretsam would I like to send a knife to some random guy on the internet that i have spent hours upon hours making? hell no, but as a compromise I am getting a camera in the near future so I can post videos of my knives and hopefully attract some business. Perhaps you can see abuse of one of my knives on one of those videos and draw your own conclusion.