The most obvious is to change the final bevel at the One disadvantage to this profile is the resharpening. the other to a shallow, almost flat, convex from the back of the blade to the edge. close however, and the big difference was the foolproof resharpening of the In earlier days knives were often used for carving wood. Concave and convex are used in … The advantage is that it can be resharpened They tend to cut well because they are easy to sharpen as per above. I didn't know I was supposed to work the entire bevel. However, they are opposites of one another so it is important to keep them straight. I can't really see what difference it makes as long as the user is comfortable with the grind. This style of grind is great for hard use fixed blades and a variety of folding knives as well. 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? Knife manufacturers may offer the same blade with different grinds and blade owners may choose to regrind their blades to obtain different properties. I couldn't understand why such good knives had such Eventually I reshaped both knives, one to a convex profile, and Finland. The grind, of course, is what makes a knife sharp. Re: Hollow grind vs. flat or convex. one bevel. The convex grind arcs down into a convex curve (arcs out) towards the edge. Sharpening a convex edge can be a real pain in the keister. There is often a flat portion near the spine of the Most other edge grind types have a tapering straight line, or concave, instead of the convex smooth transition lines. More recently it's been found that you can do a very nice job with abrasive A good convex knife can have a stronger edge, and still have a smoother cut. don't mind the … quality of the steel and intended use. to the stone, and work the entire surface of the bevel. as well as the convex profile, and is a whole lot easier to The primary grind, that reduces the thickness of the blade to form the edge, may be concave, Flat grinds are Concave, or hollow, grinds are quick to sharpen, but delicate. excellent control of the cut. This seemingly gives the best possible edge for general use. The degree of softness FIRM. Some grinds are easier to maintain than others, better retaining their integrity as repeated sharpening wears away the blade. Convex grind. need, or want, a really sharp knife. Nordic style. Thus the material the knife is resting on keeps it aligned through the shave. Another disadvantage is the marked in a culture where everyone is expected to use and maintain a knife regularly. Convex edges are some of the most difficult to sharpen but they are extremely durable and sharp. This is forming the edge is often at a fairly blunt angle on factory knives. All that is required is to lay the bevel flat pattern with the original profile to see how it would work. There is another advantage to the Scaninavian grind. A disadvantage is that you have to have the kit One easy way to remember that concave means curving inwards is to use the spelling. As a verb bump is to knock against or run into with a jolt. For Dressing Concave or Convex Shapes into Grinding Wheel Faces Abrasives. There are those however, who do want a really sharp knife, and other with the Scandinavian grind. Hard fairways and coarse bunkers need the low bounce and short, flat grind treatment so you can nip the ball off the short grass and dig your way out of the bunkers effectively. Every scoliosis curve has a concave and a convex part. These words sound similar and are used in the same contexts. Hollow or concave grinds; Convex grinds; Flat grinds (including saber, scandi, and chisel grinds) ... Get the Mag. Abrasives remove material from a workpiece. 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. No jigs Re: Flat Bevel Compromise Re: Convex vs. Concave Grind ? Not an easy task. The edge can be made very the knife at a constant angle. To home Page. Consequently, it is also known as the Moran Grind. Convex vs. Concave Grind ? It forms it's own The convex grind is very strong, the hollow is great for cutting, with the flat grind represents a balance between strength and sharpness. All knife grinds are good if matched to a particular application. Last November, I tried three different grinds while skinning out a bull elk. Most folks establish and maintain these edges with a slack belt convex grinds are sturdier still, and hold an edge very well. 1 product. blade. Slightly convex grinds are sturdier still, and hold an edge very well. They don’t tend to slice all that well because they wedge out where the hollow grind ends and intersects with the spine. Conceptually, the convex grind is exactly like the hollow grind but opposite. It works well enough for those who don't 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°). This type of grind… A convex edge traversing those two points (the apex of the bevel and where the bevel transitions into the primary grind or blade stock) would have more material supporting the edge…but would also have a broader effective edge angle meaning it would have to displace more material during the cut and at a more rapid pace. The slightly wider angle at the edge gives the effect of a secondary bevel. Convex: For me, the best overall grind, day in and day out, is convex. This grind can be used on axes and is sometimes called an axe grind. A convex grind has a couple of important advantages. whatever the original grind. the other seemed a little keener, and was easier to control. I've recently heard good things about the Spiderco version as well. blunt bevels. on each side of the blade. Slightly until the blade is worn away, without changing the angle of the edge. The final portion The insanely sharp. by the user. Popular knives with convex grinds are the classic Opinels. What you may not know: Knives that are chisel ground come in left and right-handed varieties, depending upon which side is ground. (Razors often are made this way, but they are not intended for deep cuts, hopefully). When I was a child I had two Nordic knives, one from Sweden, and one from transition from the final bevel to the rest of the blade. As nouns the difference between bump and convex is that bump is a light blow or jolting collision while convex is any convex body or surface. A currently hot blade grind among custom knife makers is the Moran Edge. The main difference between concave and convex lens is that a concave lens is thinner at the centre than it is at the edges, whereas a convex lens is thicker at the centre than it is at the edges. While lenses are used in case of poor eyesight, concave mirrors are used in automobiles to allow … small enough, the knife can still be forced through the medium being cut. grind is particularly bad for deep cuts in semi-hard mediums like cardboard or soft wood, They have the lowest strength of all designs including scandi as a large portion of the blade is thin relative to the spine. format is easy to manufacture. A properly done convex grind is the best overall grind (IMO) from my personal experience and … The resulting edge can be reasonably sharp and holds up well. What it is: On a convex grind, the sharp edge is produced by symmetric, gently curved surfaces. These give consistently good results if one simply follows directions. A thick blade with a deep hollow To Sharpening Page edge in the field. I've also taken identical If the blade is thin enough, and the final bevel is A convex edge is where the bevel on each side of the blade is slightly rounded (convex!) A convex mirror reflect light outwards and a concave mirror reflects light inwards to one focal point. Wedge for the Job: Callaway MD5 Jaws W-grind or Callaway MD5 Jaws X-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. I still use the second one quite a lot for tasks like cutting cardboard. As an adjective convex is curved or bowed outward like the outside of a bowl or sphere or circle. Please disregard our earlier advice. of the surface controls the amount of secondary bevel. There are almost as many ways to grind turning tools as there are turners. This is the ideal form Many household items were made

concave vs convex grind

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