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Which grit you should use depends: How often do you sharpen? How dull do you let your knife or tool edge get before you re-sharpen it? How sharp is sharp enough for you? Ask yourself these questions, and then read the grit descriptions below to determine which grit(s) best suits your needs. Hint: the pros use more than one grit & move from coarser to finer grits as they sharpen. Therefore our top recommendation is for you to consider one of our two-grits-in-one-tool models (Double-sided Diafold® Diamond Whetstones™ or DuoSharp® Diamond bench stone models). If you’re still not sure, call Customer Service at 800-666-4368, ext. 1. Our office is open Monday – Friday, 8:00 a.m. to 5:00 p.m. EST. Extra Extra Coarse- Use when excessive stock removal is needed, this will do the job quickly and precisely. DMT®’s bench stone has a surface flatness to +/- 0.001”, is perfect for flattening water stones, Arkansas stones and synthetic stones. Also, a safe alternative to powered grinding with no worries of heat build up that can damage tool temper. Color code: Silver. Size: 120 micron / 120 mesh. Extra Coarse- Recommended for aggressive removal of metal on damaged tools or for heavy-duty outdoor tools such as axes and lawn mower blades. This grit is great for flattening Japanese waterstones and is also commonly used as the first step in flattening the backs of chisels and plane irons and for rapid stock removal from a chipped or badly damaged edge. Color code: extra coarse (60 micron, 220 mesh) "black". Coarse– Quickly restores a dull edge to cutting sharp again. Customers that desire cutting fast action without worry of edge refinement often use our coarse models. Color code: coarse (45 micron, 325 mesh) "blue". Fine– Restores to a fine edge any knife or tool that is slightly dull. Many of our customers consider the fine grit to be a medium/all purpose sharpener. Professional Chefs and gourmet cooks prefer using our fine grit models. For woodworkers and sportsman who are stepping through the grits, it’s the edge refinement step done before micro beveling and polishing. Color code: fine (25 micron, 600 mesh) "red". Extra Fine- Refines and polishes the sharp edge to razor sharp perfection. If you are new to sharpening or if you do not need your knife or tool edge to be as sharp as absolutely possible, this grit is not recommended. But if it’s not sharp until it’s sharp enough for you, this is the grit you are looking for! Color code: extra fine (9 micron, 1200 mesh) models "green". Ceramic- Polishes edge to a mirror finish. Color code: gray.
Extra Extra Fine- Provides the finest grade micronized bonded diamond abrasive available anywhere for the ultimate edge refinement down to a polished edge. Quick stock removal with millions of diamond cutting edges. Color code: tan. Diamond size: 3 micron (or 8000 mesh). We are happy to send you an illustrated price catalog. To request a catalog, use this link http://www.dmtsharp.com/purchase/ and click on Request a Catalog or call us toll free at 800-666-4368. The DMT Commitment: For over thirty years, DMT has been committed to one thing: to innovate and produce the world's finest diamond knife and tool sharpeners. All DMT products are made using the highest quality materials and workmanship and are guaranteed to be free of defects. Any product found to be defective, will be replaced free of charge - it's that simple! It depends on how often you use it, if you use it properly, and if you keep it clean and properly stored. When used properly, kept clean and stored dry, DMT® diamond sharpeners will last a very long time. They do not last forever, but they last for years and years. If you use your sharpener as part of your daily work and use it many times a day, you will likely need to replace it in a few years after extraordinary service. If you use your sharpener to sharpen your kitchen knives every so often, chances are your sharpener will last ten or more years. Some of our customers report their DMT® sharpeners are still performing after twenty years of service! DMT® sharpeners are very, very flat. The DuoSharp® models are engineered to be precision flat – incomparable to any other sharpening stone on the market today. However, if you are concerned that your sharpener is not flat enough for your application, send it back to us for evaluation. Please send it to DMT¨ Customer Service
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| Aligner Setting | Blade Width -> | 0.5" | 1" | 2" | 3" | 4" | |||||
| 7 | Lowest | 17 | 16 | 14 | 13 | 12 | |||||
| 6 | 21 | 20 | 18 | 15 | 14 | ||||||
| 5 | 26 | 24 | 21 | 18 | 16 | ||||||
| 4 | 30 | 28 | 24 | 21 | 18 | ||||||
| 3 | 35 | 32 | 27 | 24 | 21 | ||||||
| 2 | 39 | 36 | 31 | 26 | 23 | ||||||
| 1 | Highest | 44 | 40 | 34 | 15 | 14 | |||||
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| 7 | Lowest Angle | Razors, X-ACTO Blades, Craft Knives |
| 6 | Fillet, Paring, Trimming and Tomato Knives | |
| 5 | Boning, Carving, Chef, Kitchen Utility and Small Folding Pocket Knives | |
| 4 | Folding Hunt / Sport Knives, Large Pocket Knives | |
| 3 | Fixed Blade Hunting Knives | |
| 2 | Fixed Blade Military and Survival Knives | |
| 1 | Highest Angle | Meat Cleavers, Machetes, Brush Knives |
First, clean it. If you have not cleaned your sharpener on a regular basis, it could be full of metal fines (swarf buildup) which is clogging the stone surface and affecting its performance. If you are concerned that the diamond may have worn off the stone, rub the sharpener against an old glass jar. If the sharpener scratches or frosts the glass, then there is diamond on the sharpener ready for your sharpening needs.
It is important to note that all DMT® products are manufactured to the same high standard using the same high-quality monocrystalline diamond that makes sharpening with DMT® superior. Therefore the difference between the two product lines becomes a matter of preference to the user.
The Diamond Whetstone™ and DuoSharp® lines: These products carry our signature polka dot pattern surfaces. The polka dots are slightly recessed so that when you are sharpening the the small amount of material (swarf) that is being removed will fall into the polka dots and remain out of the way of the sharpening surface making your sharpening work quick and easy.
The Dia-Sharp® line: These products have a continuous diamond surface, which makes them perfect for small-pointed tools as well as your other sharpening needs. Its base is steel therefore weighs more that the plastic base of a Diamond Whetstone™
When compared with conventional sharpening stones, all DMT® products work faster and sharpen exceedingly quick using light pressure…..and they remain flat. I want more information
While we recommend you use DMT® products dry or with water only, it is acceptable to use a variety of lubricants when sharpening with DMT® products. Mineral oil, mineral spirits, kerosene, WD40 can all be used without harming your DMT® sharpener. We do not recommend storing your DMT sharpener in kerosene. DMT® recommends that you always wipe your Diamond and Unbreakable Ceramic Sharpeners clean and store dry after use.
Chances are you are not maintaining a constant angle. We recommend sharpening at a 20-degree angle. That means positioning the knife so it is resting on the sharpener at about 20 degrees. If you are not sure what 20 degrees looks like, you could put two quarters on the sharpener and rest the knife on it. That will be very close. However, sharpening at the proper angle is not as important as sharpening at a constant angle. Read on…
In order to sharpen properly you need to maintain a constant angle. Lock your wrist. If your wrist wobbles and therefore does not keep the knife at a constant angle, you will not be able to sharpen you knife. If you are new to sharpening and you’re not sure if you are holding the knife at a proper angle or not, we recommend the following:
Use a black marker and draw a line on the bevel of the knife. The bevel is the shiny part at the edge of the blade that has a different angle to it (that’s that part that does the cutting). After you have drawn a line on the knife bevel, sharpen it. Look at the knife to see if all the black is gone. If it isn’t you can see whether you need to raise or lower the knife angle during sharpening (by raising or lowering your locked wrist).
If you need further assistance, call Customer Service toll free at 800-666-4368, ext. 1. Our office is open Monday – Friday, 8:00 a.m. to 5:00 p.m. EST.
We do not recommend sharpening figure skates with a DMT® sharpener. The bottom of hockey skates should also be sharpened professionally because there is a hollow grind on the bottom of the blade. DMT® sharpeners are great for taking the burr off the side of skates. In fact, many professional hockey players use DMT® sharpeners during practice and during games to remove the burr off their skates — just like skiers and snowboarders do.
DMT® had been a sponsor and supplier of Diamond Sharpeners to the Olympic US Speedskating and USA Luge teams. Many professional speed skaters use the DMT® 250mm DuoSharp® to sharpen their speed skates. They put the skates in a specially designed clamp holder so the blade is pointing up. More than one DMT® grit is used to get speedskates medal-winning sharp. The most popular grit combinations for speedskates are coarse/fine and fine/extra fine. Some skaters use the extra coarse/coarse stone and progress to the fine/extra fine stone. Holding the sharpener flat (at a right angle) against the blade bottom, one moves the sharpener across the blade from toe to heel back and forth a few times. Then move to the next grit repeating the same stroke. Always start with the coarsest stone and end with the finest.
Yes! Many of our sharpeners can be used to sharpen swords. The most common models are either a DMT® Diafold® Diamond Whetstone™ sharpener or a 6" Diamond Whetstone™ bench model.
Sorry, we do not sell replacement rods for the DiamondVee™. The rods are embedded in the plastic base and therefore cannot be replaced.
The Burr Doctor® is perfect for quick deburring of nicked edges caused by ice or rocks and can be carried in a backpack or pocket. It is adjustable to fit your beveled ski/snowboard edge.
The Burr Doctor™ has a 0 – 5.5-degree adjustability. The stone is smaller (about 1.5" x 1") and can be purchased separately when the original stone is lost or worn. Small enough to carry in your pocket, the Burr Doctor™ is perfect for quick touch ups and on-the-spot treatment of burrs.
We recommend a DMT® coarse grit (45 micron, 325 mesh) or extra coarse (60micron, 220 mesh) 8" or 250 mm DuoSharp¨ bench stone for flattening Japanese water stones. It’s fast and easy. Make sure there is plenty of water to flood the surfaces of the stones when flattening to wash away the slurry made by the flattening process. View Color-coded Grit chart
As a manufacturer, we sell to retailers and distributors. We rely on specialty retailers worldwide to sell our products, help educate the public on the importance of sharpening, how to use DMT products and to assist in product selection. For those who wish to use the internet for their purchase, view our website for a selection of vendors including a dealer working as our “online store.”. If you have difficulty locating our products in your area, please contact Customer Service toll free at 800-666-4368 ext. 1 for assistance. Our office is open Monday – Friday, 8:00 a.m. to 5:00 p.m. EST.
DMT®’s
unbreakable ceramic sharpeners are produced using a patented
process called Micro Arc Oxidation.
This process is used to transform the surface of aluminum
into an unbreakable, wear resistant ceramic (Aluminum Oxide)
abrasive.
The Process
As shown in the diagram linked below, the oxide layer literally grows inward into the Aluminum by approximately 75% and outward by about 25%. Coating thicknesses can vary between 30 and 150 microns (or approximately 0.001” to 0.005”) depending on how the coating process is carried out. The process produces a two layer coating of ceramic; the outer layer (Gamma) being somewhat granular and chalky and the inner layer (Alpha) a very dense and hard ceramic abrasive. View Diagram PDF format View Diagram word format
Sometimes
some of the Gamma phase layer remains on the product’s surface
until the sharpener is used.
It is not unusual to see traces of this outer granular
Gamma phase layer slough off during your first few sharpening
strokes. It looks like smoke.
Do not be concerned by this.
It is to be expected and considered normal due to the two
layer base structure of the ceramic. After the first few
sharpenings, this outer layer will be completely removed,
leaving you a very hard, long wearing unbreakable ceramic
sharpener which will provide the ultimate in edge refinement.
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