Wedge for the Job: Callaway MD5 Jaws W-grind or Callaway MD5 Jaws X-grind. FIRM. the way from the edge to the back of the blade. Convex vs. Concave Grind ? in a culture where everyone is expected to use and maintain a knife regularly. of the surface controls the amount of secondary bevel. Eventually I reshaped both knives, one to a convex profile, and This type of grind… The compact lenses that are made for those having a weak eye sight are convex on the outer side and concave on the other so as to fit snugly on the spherical pupil that human beings have. Concave and convex are used in … With a traditional, flat sharpening stone, one must repeatedly and consistently follow the contour of a rounded, convex edge with the flat surface of a stone. transition from the final bevel to the rest of the blade. I can't really see what difference it makes as long as the user is comfortable with the grind. Flat grinds are sturdier, and simple to sharpen on basic equipment. Concave, or hollow, grinds are quick to sharpen, but delicate. There is usually a secondary bevel which is less acute and forms the edge itself. Swedish carving knives, reshaped one to a Moran style edge, and left the They were very What it is: On a convex grind, the sharp edge is produced by symmetric, gently curved surfaces. system. "Concave" edge grinding. There is often a flat portion near the spine of the It is also sometimes referred to as the Appleseed Grind. Roger F. >What are the advantages of a convex/round grind over a concave/hollow grind or vice versa, for a deep fluted bowl gouge? small enough, the knife can still be forced through the medium being cut. Convex blades usually need to be made from thicker stock than other blades. Francois Massyn 4" Carbon Fiber IKBS Flipper, How to Drill Tapered Tangs By Brad Peacock, Deceased Estates with Knifemaking Equipment, Sealing knife handles with Shellac for perfect finishes. unsuitable for actually cutting things. This grind can be used on axes and is sometimes called an axe grind. The latter is used for knives such as cleavers, which must be tough but do not require a sharp edge. I still use the second one quite a lot for tasks like cutting cardboard. excellent control of the cut. Every scoliosis curve has a concave and a convex part. One easy way to remember that concave means curving inwards is to use the spelling. The Scandinavian Grind is a wide flat bevel that runs to the edge of the blade Just my $0.02 on what the best overall knife grind is. It’s advisable to lightly draw the opposite (straight) side of the edge across the hone occasionally, to remove any burr that may develop during sharpening. sharpened straight to the edge. as well as the convex profile, and is a whole lot easier to Instead of a concave grind which minimizes the material close to the edge, the convex grind places the maximum amount of material at the edge. Concave and convex both are used as an adjective to denote an entity that has outline or surface curved inside or bulges outside. sturdier, and simple to sharpen on basic equipment. Sharpening a convex edge can be a real pain in the keister. This is a slightly convex profile, A thick blade with a deep hollow As a verb bump is to knock against or run into with a jolt. It holds an edge almost keen, but is still durable. 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. The primary grind, that reduces the thickness of the blade to form the edge, may be concave, Finland. as they taper to form the edge. Concave contains the word cave. Knife manufacturers may offer the same blade with different grinds and blade owners may choose to regrind their blades to obtain different properties. This requires some patience, but minimal skill. Thread starter Wiredude; Start date Mar 25, 2016; W. Wiredude Well-Known Member. The most obvious is to change the final bevel at the I have a silly way to remember which side is the concave part of the curve by thinking of an actual cave made out of rock. The final portion Concave vs. Convex: Examples The main parts of the complex are connected by spaces in which dark alternates with light, concave elements with convex and closing-in with opening-up, and the pursuit of extraordinariness is occasionally paused by something quieter. This is named after Bill Moran, who popularized it on his now classic knives. The slightly wider angle at the edge gives the effect of a secondary bevel. A convex grind has a couple of important advantages. smooth transition to the nearly parallel sides of the blade causes minimal This is the ideal form While lenses are used in case of poor eyesight, concave mirrors are used in automobiles to allow … To Sharpening Page How to sharpen it: Sharpen a chisel grind as you would any other V-bevel (including by using a guided system), except that only one side of the blade is honed (often at an edge angle of about 20 – 30°). Most knives, especially those from factories, combine two or three planes You namely miss the angular shoulder a flat grind does have. Nordic style. Japanese knives feature subtle variations on the chisel grind: firstly, the backside of the blade is often concave, to reduce drag and adhesion so the food separates more cleanly; this feature is known as urasuki. All knife grinds are good if matched to a particular application. I couldn't understand why such good knives had such Slightly convex grinds are sturdier still, and hold an edge very well. why most woodworking chisels and knives have a flat final bevel. These give consistently good results if one simply follows directions. What you may not know: Knives that are chisel ground come in left and right-handed varieties, depending upon which side is ground. In the following video, Walter Sorrells explains how each blade grind is produced, and how this affects its durability and cutting performance. The Hollow Grind has been a historically popular type of grind, especially in the hunting community. Hollow or concave grinds; Convex grinds; Flat grinds (including saber, scandi, and chisel grinds) ... Get the Mag. The result is a very keen edge that provides Popular knives with convex grinds are the classic Opinels. They tend to cut well because they are easy to sharpen as per above. Scandi grinds are a variation on a full flat grind and are remarkable tools for woodcraft and carving. The whatever the original grind. flat, or convex. No jigs I've got flat grinds, convex grinds, concave grinds, and multi angle grinds. It forms it's own Concave, or hollow, grinds are quick to sharpen, but delicate. Re: Hollow grind vs. flat or convex. If you carve wood, Re: Flat Bevel Compromise Re: Convex vs. Concave Grind ? I didn't know I was supposed to work the entire bevel. Convex Grind – (AKA “axe grind” or “Hamaguir”) – As the name suggests, this is the opposite of the hollow grind. For many years I ground, or reground if necessary, What you may not know: The concave surfaces of a hollow grind tend to draw the work against the blade and toward the edge before the flat surfaces (higher on the blade) push it away, which is why many knife lovers prefer this profile for slicing and skinning. on each side of the blade. fragile edges. pattern with the original profile to see how it would work. resistance moving through the medium being cut. you will probably find that the flat bevels give you better control of the cut. I started carrying a Swedish The downside is that a full Scandinavian edge is fragile.