Since the bevel on scandi grind knives is so large and flat it is pretty easy to get the right angle for sharpening. There are YouTube videos on sharpening convex blades, some of which aren't bad. You're simply incorrect in real world cutting use. The convex profile enables penetration, splitting force, and ease of re-lease (the chisel grind discussed in the “Ax Head Grinds” section later in this chapter provides strength for the cutting edge). Using a layer of foam mouse pad underneath the sharpening surface allows the sharpener to conform to the curved shape of a convex blade grind. Sharpening a convex edge on Work Sharp products provides minimal material take off, and more time between sharpening. I've been reading what I can. Instead of it being hollow this grind is rounded. Convex edge. You namely don't have to stop sharpening halfway through the blade. Home of the all American Convex Sharpening Systems. I've read that you can't just use a rod sharpener. Asymmetrical grinds are most often found either with convex grinds or with flat grinds. The grinding process dictates how the blade is thinned to achieve the cutting edge. You're clinging to a partial technicality in initial edge angle and … Convex edges are very easy to work with in the Wicked Edge. Convex grind. Colour the edge with a felt-tip pen or similar, and it will immediately be easier to see exactly where the sharpening occurs. Browse more videos. You can maintain a convex edge already on the knife and you can also create your own convex edge. At Moleta we train our sharpeners to do the same thing by eye and feel which allows us to press into our machine and produce a convex grind which lasts 3-4 times as long as a flat grind and removes less steel. Thanks for … The Convex edge is ideal for tactical knives and kitchen cutlery for various applications: outdoor activities like hunting and … I prefer to use small stones and work the knife directly. Fallkniven convex blade sharpening can be tricky, this homemade strop is the best option for maintaining the blades convex shape whilst making it razor sharp. These knife sharpeners are cheap and easy to make. However being as the blades are convex, the strop must have some give so as to not flatten the edge and create an … Especially experienced bushcraft enthusiasts will notice the advantages of a convex grind. This puts extra steel behind the edge, reinforcing and strengthening it. 1) Will sharpening with a file/stone puck or water stone flatten the convex grind on an axe? Many of … This requires a special but easy approach to sharpening. You can feel directly whether the knife is sharp or not, and it is a fairly safe way to test the sharpness. The convex grind technically does not have an edge grind (edge bevel), the grind curves all the way into the edge. Of course, all of these types of edges come with their own unique features, but in this piece, we’re going to take a more detailed look at a hollow grind. If you have any questions at all please feel free to contact us. If I develop a convex edge by sharpening equal width facets from 15, 16, 17 and 18 dps with 18 degrees reaching the apex on both sides, then strop the edge to remove the facets forming a radius convex geometry, this knife will have less metal behind the edge, and hence be weaker, than if I sharpen the knife in a V grind all the way to the apex at 18 dps. Initially, it doesn’t matter what kind of motion you apply, so long as the bevel stays flat. In this scenario, the convex … The best way to test the sharpness is to draw very lightly the edge on a fingernail. A convex grind is strong and sharp, but requires a special sharpening technique. The convex grind is actually my personal choice for a large fixed blade knife with a thick stock because I know that I'll never thin the blade out significantly enough in my lifetime to weaken it, but for a somewhat smaller and/or thinner knife I see more merits to the Scandi (i.e. There are many kinds of grinds out there, including the hollow grind, full flat grind, chisel grind, sabre grind, convex grind, and scandi grind. Remarkable about the convex grind is that there is no longer a secondary edge, but that the grind is applied up to the cutting edge. Flat grind and other edge types tend to require more frequent sharpening as the knife dulls, therefore decreasing the life of the blade. On the other side of the spectrum from the concave bevels of the hollow grind is the convex grind — also known as an “appleseed,” “Moran” (after the legendary custom knifemaker … And lastly, I really don't … shape for a Forest Service work ax is the convex pro-file (figure 8–9) with a chisel grind. Where the curvature begins (high or low on the blade) can produce a full convex, a saber convex or even a Scandi convex grind. *** -----Product Distributors . First one is the length… So my options are to grind it to a V or figure out how to do it with my KME. Cut a 1.5×0.5″ oak board into three lengths. If you have a persistant … For example when maintaining your edge, usually all that is needed is a few strokes over a leather strop. I use the sandpaper/mouse pad-leather strop method for my convex knives. Now that I'm turning to the axe, I have a few questions. It might take some getting used to but sharpening a convex edge is easier than sharpening using the same angle. There are On a production level there are some 'bumps in the … Complete guide to learn how to sharpen Bark River Knives and other convex edged knives. Well folks, that’s the basics of knife grinds. How to sharpen convex grind with KME using standard guide rod? What about the convex grind on the Real Steel Bushcraft Plus Convex? The concave offers hundreds of sharpenings made easier than convex or flat ground which always requires the removal of more metal to get to the required sharpness. People often believe that since a convex grind offers more metal to support the edge, it will prolong its life and prevent the edge from going blunt. Look at the lower half of that picture and tell me which blade will have less resistance when pushing through material. My question is, how do I sharpen a convex edge knife without ruining it. In theory, convex … In one flowing line the knife becomes thinner as it moves from the spine towards the edge. New Lifestyle. What it is: On a convex grind, the sharp edge is produced by symmetric, gently curved surfaces. Report. Woodcut Tru-Grind sharpening system. I think that may be why it is so popular for a Bushcrafter). This grind can be used on axes and is sometimes called an axe grind. Part 1.Knivesshipfrees videos on how to sharpen a Bark River (or any convex ground) knife.17th Generation Yoshimoto Bladesmith/American Bladesmith Society Master Bladesmith Murray Carter gives insight on how to properly hone a convex edge. You're basically saying that a 50 degree v grind is equal to a 20 degree convex bevause the tip of the convex has that initial steep angle. A lot of the Bark River and Fällkniven knives (and possibly all of them) have a convex grind on the blade. I don't know much, yet, about different knife grinds and edges. The mousepad could be omitted for non-convex grinds. Convex grind does a better job than hollow and flat grinds: A grind refers to the shape of the cross-section of the blade. The grind isn't hollow or flat, but convex. That's just me. With a convex grind you sharpen the entire curve of the blade and not just the edge / the cutting surface. Follow. However, I found a very simple, clear explanation put out by the Bark River Knife Collector’s Association which is very good. The facts are quite the opposite … Even with repeated sharpening, the edge thickness will remain thin and the knife will cut with minimal resistance. Playing next. Sharpening Convex Edges (1) Introduction to Knife Grinds. To achieve this grind one sharpens the blade on a free sharpening belt. I read that the Tank Buster is a sabre grind with convex edge. Understanding a hollow grind Another is a Marble's Campcraft in 52100. Sharpening a convex edge also requires a different sharpening technique. We hope you take some time to visit all of our site pages as there is a lot of information available. What's required, then, is an abrasive surface that ever … Convex Grind – (AKA “axe grind” or “Hamaguir”) – As the name suggests, this is the opposite of the hollow grind. Figure 8–9—A convex ax head with Convex grind. I have gotten fairly decent on doing a V gring using a sharpmaker. Thank you for visiting our page. Woodcut Tru-Grind sharpening system. A grind that often leads to questions is the convex grind. With a convex stone, so long as the stone’s curvature is more intense than the razor’s, the stone cannot touch the razor twice with a gap between contact spots – it can only touch the razor in one continuous contact, regardless of warp within allowed tolerances of the drop forged razor. Instead of straight edges like the flat grind or edges that bow inward, these ones actually curve outward in a convex fashion, resembling the likes of a clamshell. Both are extremely efficient slicers now, but any difference between a shallow V grind and the convex edge would be difficult to detect, IMHO. Many knife aficionados consider a convex grind the strongest and most durable profile. If the curve runs over the entire blade (up to the spine), it is even easier to sharpen. Click to … As such the edge doesn't have a 'shoulder' that could get in the way as you use the knife. And, does the fact that it is sabre ground make a difference in sharpening methods? sharpening videos. ***Our offices will be CLOSED October 7th - October 12th, we will reopen on Tuesday, October 13th. Because you don't experience that much resistance the more detailed tasks are easier to carry out. I was given affixed blade knife to sharpen and as soon as I started I realized it has a convex grind on it. Most sharpening services available produce a flat grind via machine grinding or using a jig to hold the blade at a certain angle. If just the bevel is convex, or you just want to sharpen the edge on a full convex grind (which is vastly more efficient) you do almost the exact same thing except you lift the spine of the knife so just the edge makes contact. But this convex grind is new and unfamiliar. From what I have been seeing, the most common method is to use a piece of sandpaper on a mousemat, and then dragging the blade (spine forward) on finer and finer grits of paper. What it's good for: Hunting, woodworking, food … I have a number of blades with convex grinds -- a SRK that I re-profiled as the factory edge was too obtuse, and it just sort of turned out convex by accident, not intent. Such a shape keeps a lot of metal behind the edge, making for a stronger edge while still allowing a good degree of sharpness. Sharpening the Scandi grind. This is harder feedback wise as you don't have as much a tactical responce. looking for a bit of advice on convex grind sharpening. 3:32. It, for … Sharpening … You will therefore experience a lot less resistance when you use a convex edge as when you use a knife with a conventional V-edge. In this video knife maker Walter Sorrells explains the difference between various types of knife blade geometries. A convex grind, with two gently curved surfaces ending at the edge, is fundamentally different, so a flat sharpening system designed to hold a precise, consistent angle won't get the job done. limit my search to r/sharpening. This grind is often used to produce a more durable edge and can be found on some popular folders on the market. 5 years ago | 183 views. To maintain the edge on a knife that already has a convex edge, all you really need to do is to use a marker and find out what the final edge angle is. Convex grind — Rather than tapering with straight lines to the edge, the taper is curved, though in the opposite manner to a hollow grind. Test the sharpness. As one sharpens the blade and gets past the initial wider part of the blade, the blade will become easier to sharpen and will very slowly become more difficult as the hollow grind becomes thicker up the blade. The convex grind is similar to the sabre grind in that it (typically) still has a lot of steel in the middle of the blade, making it the thickest of the three main types of grinds. use the following search parameters to narrow your results: subreddit:subreddit find submissions in "subreddit" author:username find submissions by "username" site:example.com find submissions from "example.com" url:text search for "text" in url selftext:text search for "text" in self post contents self:yes (or self:no) include (or exclude) self … T o sharpen the Scandi grind by hand, place the bevel flat to the sharpening stone and work on the whole edge. The Asymmetrical grind is can be found on tactical style knives because of the combination of a durability, strength and sharpness. I've been working with convex knives for some time and feel comfortable sharpening them.