December 1, 2020

The type of grind on your knife has a considerable influence on how successful it will perform a certain task. An appropriate grind depends upon a blade’s intended use and the knife steel composing it. But is there a so-called best blade grind … This includes V, all types of Convex edges and Hollow grind edges. No, you don't need 5 years experience to use one. The grind of a blade is where a key battle is won, and blade geometry varies widely. I was at a Michael Hosaluk demo and he would grind the tool and then in between visits to the grinder he would use a diamond hone to touch up the edge. I never really saw any advantage myself. Re: Hollow grind vs. flat or convex. I thought it would be better getting diamond stones in the future as they are a one-time purchase. Some hardened tool steel will support a hollow grind where a softer or more brittle steel would not. It helps then if you have at least a fundamental understanding of blade grin… Sharpening hollow-ground chisel and plane blades with Garrett Hack Sharpening chisel and plane blades by hand is a time-consuming process. Single Grind - Knife edge bevel is ground only on one side of the blade. The hollow grind has a long history of use in the hunting community because the thin and extremely sharp edge is great for field dressing animals. The properties of the steel, the profile or grind, and the intended use should all be considered and work together. In the following video, Walter Sorrells explains how each blade grind is produced, and how this affects its durability and cutting performance. It could also cause irreparable damage to the edge. Every single (western) plane iron I have sees a bench grinder once or twice a year. I would have made an instructable out of it, but I don't have any pictures of the process and it's pretty easy to see how the thing goes t… I think it depends on the steel and the intended use. Press question mark to learn the rest of the keyboard shortcuts. But this guy is a genius and he does it : :). (You must log in or sign up to reply here.). False. In the last section, we prepared our grinding wheel so we are ready to grind our chisel. My chisels and planes are sharp enough to shave with. Learn the basics, practice on stuff that doesn't matter. Now I don't mean flat for its entire length. A Simple Hollow Grinding Jig: This is a jig I threw together from things in my shop that makes it easy to create hollow-ground knife bevels. I got this set for 20 bucks. Flat grinds are great for whittling and general use. These chisels benefit from a flat bevel due to the abuse they take when chopping. FLEA DT is a single hollow grind. This is how straight razors for shaving are ground. I would be hesitant to hollow grind any chisel that you primarily strike with a … This type of grind… If you sharpen a chisel against the edge of a rotating wheel on a bench grinder, the resulting surface will take on a concave shape – referred to as hollow ground. The first huge lesson we got was on sharpening. Wuertz Machine Works 24,330 views Lets you get a flat/convex bevel rather than a shitty hollow grind. What it's good for: Whittling, woodworking, food preparation, general use. This is perhaps the oldest of all knife grinds and is one of the more difficult grinds to achieve. 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. T o sharpen the Scandi grind by hand, place the bevel flat to the sharpening stone and work on the whole edge. Part 1 - Duration: 7:58. (Think about how chisels and gouges for wood working are ground. One of my customers is a pawn shop. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Hollow grind vs Flat grind is a common debate with Spyderco since so many models are available in both configurations. The result is a very sharp but weak edge. This includes all types of Chisel grind edges. I made a tool rest which I can run my finger along to guide the grinding and slide the gouge or chisel in or out to get the wheel in … The modern tactical and bushcraftmovements have brought heated debates on which grind is the best. The first huge lesson we got was on sharpening. Convex or “appleseed”? The bevels may extend the full width of the blade (full hollow grind) or only a portion of its width. 1) Hollow Grind, 2) Flat Grind (AKA Scandi) 3) Sabre Grind 4) Chisel Grind 5) Double bevel Grind 6) Convex Grind Now you wouldn't want 1 or 2 on a chopper (Too thin at the edge), you wouldn't want 4 on a slicer or skinner (The "Angle" is wrong for that)Or 5 (too thick, causing drag. Since the bevel on scandi grind knives is so large and flat it is pretty easy to get the right angle for sharpening. I prefer a belt sander for doing heavy grinding. For now I was hoping to do rough grinding on stone to remove rust, etc. I'm currently a student at North Bennet Street School in the Cabinet and Furniture Making program. Double Grind - Knife edge bevels are ground on both side of the blade. Chisel Grind – (AKA “zero bevel grind” or “single bevel grind”) – Just like a—you guessed it—chisel, this knife edge is flat on one side and the opposite side ground between 20-30 degrees to about halfway up toward the spine. Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. Flat grind is great for all around use. Most likely it was a conversation between two flintknappers sitting around a cave—and the battle of which grind is the best rages on to this day. By using our Services or clicking I agree, you agree to our use of cookies. Can I do the whole lot completely on waterstones? This is characteristic of straight razors, used for shaving, and yields a very sharp but weak edge, which requires stropping for maintenance. Part 5: Grinding the Hollow. It may be flat or hollow ground. chisels not to grind. , then using waterstone to sharpen. Flat Grind. Baldor motor attached to the grinder No vibration just sits on the bench and runs like a champ. There's no better way to ruin chisels and plane irons that mechanical grinder. They often set these things aside for me and use it for barter. The convex grind is very strong, the hollow is great for cutting, with the flat grind represents a balance between strength and sharpness. What would be the grits I need. I mean taking a rusty chisel with nicked edges up to a good condition. There's also no better way to sharpen chisels and plane irons than by hand with a little elbow grease. Before you grind, you have to make sure that the back of the chisel is flat. Cookies help us deliver our Services. Looks like you're using new Reddit on an old browser. They all have the factory bevel but two are dull from an obvious novice trying to sharpen them, the other two were untouched. It's like any tool really. Grinds: Flat, Hollow, Sabre, Chisel, Convex, American Tanto Dual, and Scandi. Belt sander is a on the job site option but the grinder is the best option with a polishing wheel. P.S. Hollow grind: The blade is ground to create a concave, beveled cutting edge. I need some informed opinion as to the best of two purchase options. It requires stropping, which is fine, but the edge won’t last long. Nice find at the pawn shop. Grinding and hand sharpening are not mutually exclusive. I also find it a necessity to hollow grind all blades. I use a 6" wheel driven by a 1725 rpm motor with a 2:4 pulley set up to cut the speed in half. Flat grind — The blade tapers all the way from the spine to the edge from both sides. I know that these are not excellent quality tools, but they are reliable and they have a 3 year guarantee where you can take them back to the store and get a refund no questions asked. Hollow grinding has almost always been used in very high-quality knives and razors because it is easier to sharpen! Sharpening the Scandi grind. Never underestimate the value of a hollow grind, I don't mean for day to day sharpening, I mean restoring old rusty chisels with damaged edges. Using a "doubler plate" and "table saw analogy " to hollow grind a blade. For decades sharpening with grinders was the only option for woodworkers. A lot of metal is removed from the blade, so it is thus more difficult to grind, which is one factor … What it is: A double-bevel grind, also known as a "compound grind," can, in overall profile, incorporate virtually any other grind -- flat, hollow, convex -- with the addition of a secondary V-bevel to produce a cutting edge. New comments cannot be posted and votes cannot be cast, More posts from the woodworking community. Like some saber grind knives as well. A full flat grind or hollow grind is best for skinning too, though a scandi can perform excellently in that capacity. The flat grind is the simplest grind … Work smarter, not harder. Hollow grind — a knife blade ground to create a characteristic concave, beveled cutting edge. Hand sharpening may inflate your ego, but it's not always efficient or necessary. Hollow & Flat Grinding. But that would be a very odd chisel. The Dragonfly2 Salt is actually hollow ground but often that is referred to "high hollow" since the grind line stop over half past the middle of the blade. I wouldn't use a belt sander for the same things. In a flat grind, both sides of the metal are ground consistently, gradually tapering from the spine to the edge, forming a long isosceles triangle. Discussion in 'Non-Firearm Weapons' started by jmr40, Oct 12, 2020. Chisel: According to Knife Edge Grinds, a chisel grind has only a single edge angle. I am only interested in using these to restore/sharpen chisels/plane irons and I wonder which one of these two tools would be more useful. Attempting a specific job with the wrong grind on your blade will make that job much more difficult. SINGLE-BEVEL GRIND Also called a chisel grind, this describes a blade that is beveled on only one side. Chisel This grind is most often found on chisels but can also be found on other types of blades such as high end Japanese chef knives, modern folders and some modern “art” tactical knives. Any serious hand tool user (even Paul Sellers) has a bench grinder. Bench Grinder and Belt Sander or Wet and Dry Bench Grinder. Every single student in our school is taught to sharpen using the "hollow grind" method-using a slow speed grinder to establish the edge joint and angle, then honed by hand on a stone. Some are stronger, others are sharper, and some try to find a balance of both. Please submit links to how-to pages and videos, pictures of beautiful and amazing pieces you made for us to admire, or help you finish. There are many kinds of grinds out there, including the hollow grind, full flat grind, chisel grind, sabre grind, convex grind, and scandi grind. Double-bevel grind. 4 pc wood river chisel set. Obviously, if the entire face of a chisel for example is concave, more metal is removed than if it were a flat grind. Every single student in our school is taught to sharpen using the "hollow grind" method-using a slow speed grinder to establish the edge joint and angle, then honed by hand on a stone.Grinding and hand sharpening are not mutually exclusive. Basically, blade grind refers to how the cross-section of the blade is shaped to produce the cutting edge. Full Flat. Who knows when the first argument over the best blade grind started? Appreciate the scandi grind (got to, being of Finnish heritage) for some utility knives (first knife as a boy was a puukko). Yes, you can do damage with a grinder. Anyone who tells you you don't need one has never cambered an iron, sharpened a cambered iron, restored an old pitted iron/chisel, or experienced the joy and ease of sharpening a hollow ground edge. My chisels and planes are sharp enough to shave with. Flat (V) - The simplest and most widespread in … Understanding Hollow, Convex, and Flat Blade Grinds ... (including saber, scandi, and chisel grinds) Subscribe Today and Save! Paul Seller's method without diamond stones, I'd have to buy a lapping plate, wet or dry, a strop, adhesive spray and polishing compound. Neither The High Road nor any of its directors, members, managers, employees, agents, vendors, or suppliers will be liable for any direct, indirect, general, bodily injury, compensatory, special, punitive, consequential, or incidental damages including, without limitation, lost profits or revenues, costs of replacement goods, loss or damage to data arising out of the use or inability to use this forum or any services associated with this forum, or damages from the use of or reliance on the information present on this forum, even if you have been advised of the possibility of such damages. The discussion in this thread, before you have joint us, was focused on the chisel tip cutting edge. 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. While Japanese kitchen knives initially appear as a simple chisel grind (flat on the side facing the food, angled on the other), the apparently flat side is subtly concave, to reduce adhesion, and, further, the apparent chisel cut of the edge is actually a small bevel, as otherwise the edge would be weakened by the concave area above. I will be buying one but I can't make up my mind which. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Understanding a hollow grind The grind on a blade lends itself towards different advantages and disadvantages. My 8" grinder is on the very short lists of tools I couldn't work without. If the face of a chisel was flat and square and only the first half is hollow ground, then yes, a flat grind would remove more metal because it would “chop off” the top square edge. All information is provided "as is" with all faults without warranty of any kind, either express or implied. The Hollow Grind has been a historically popular type of grind, especially in the hunting community. Initially, it doesn’t matter what kind of motion you apply, so long as the bevel stays flat. It is simple. /r/woodworking is your home on reddit for furniture, toys, tools, wood, glue, and anything else that has to do with woodworking as a hobby or profession. I would not use a grinding wheel to grind the primary bevel on a mortise chisel or a japanese chisel. Part 6: Repairing a Damaged Edge Without Burning the Steel. The concave offers hundreds of sharpenings made easier than convex or flat ground … HOLLOW GRIND A blade with bevels that are ground with a concave radius. I worry this may resemble spam, but it's not the case. You are on the right track. Scandi is meant for all around utility which is easy to restore. The reason why I ask is that I respect opinions of people on here. For working wood, the wide flat scandi bevel will outperform a flat or hollow grind with a secondary bevel. It seems obvious to me, that if you hollow ground a flat chisel against the chord, you will weaken the bevel, simply because you will remove material. Flat grind. Get the Mag. c) a hollow grind removes material from the flat grind -used when you don't need the strength of a flat grind and want to reduce weight and decrease wedging Now again point (b) is the critical one, you need to be clear what you are comparing and ensure that everything else is equal.

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