DMT Dia-sharp stones are the perfect American made "stone" for sharpening narrow tools, ultra tough alloys, or resetting the bevel on a plane iron. They're easy and quick to use for general sharpening, and because they're made from the hardest stuff on earth, they're also a great choice for flattening other sharpening stones.
Dia-Sharp stones have an exceptionally dense, and evenly distributed coating of micronized-monocrystaline diamonds, resin bonded to a nickel-coated solid-steel plate. DMT precision grinds the steel to within +/- .001 flatness so you can flatten plane irons, and chisels with confidence. The diamond surface is quick cutting and durable, even under heavy use. At first the stones have a very aggressive feel. This will smooth out after a few sharpenings without impacting performance.
One of the great things about DMT stones is that they can be used dry. That's a huge benefit when working away from a sink, or on a wooden workbench. For dry clean up use a polymer eraser. If you prefer wet sharpening, use a splash of water and wipe your stone clean at the end of your sharpening session. Oil is also an option - with the proviso that the stone isn't stored in kerosene.
All DMT products are designed for a long service life. Store stones dry, (a simple wipe with a towel is fine) and leaf between stones with towel, cloth, paper, or plastic storage sleeves to prevent abrasive sides from rubbing.
We carry a full range of sizes and grits in the Dia-Sharp Stones so you can match the stone to the tool:
With 5 carats of industrial diamond the 10" by 4" stones have a luxuriously large surface for flattening chisel and plane backs, or truing up the sole of a plane. The width is perfect for use with sharpening jigs. They're also a great size for flattening other stones. 67% more surface area than 8" stones.
8" by 3" stones are are good all around, and give a nice long stroke at a slightly lower price point that the 10 inchers. DMT manufactures this size in the widest range of grits.
For carving tools, pocket knives, or sharpening on the go we stock 6" by 2" and 4" by 7/8" stones. They both fit easily into a tool kit, and the 4" stones fit perfectly in your Chisel or Carving Rolls.
All stones are single sided. No-Skid Mat available separately.
DMT Dia-Sharp stones are Made in the USA
Which Grit Diamond Stones for Sharpening?
- When you own a grinder - We recommend using the fine and extra fine grits for developing a wire edge. for edge repair we use a grinder. for final polish we use an 8000 grit water stone.
- When you don't own a grinder - In addition to the stones above we think extra coarse and coarse stones are excellent for removed damage on an edge.
Which Size Diamond Stones for Sharpening?
- For the Shop
- 8" stones are a very nice size with a good length of sharpening stroke.
- For the Road - 6" stones are small enough for travel, but still are long enough to do real work.
- On a Budget - We would not compromise on grit but try for at least 6" stones.
- The Sky is the Limit - 10" stones are overkill. But my are they nice!
DMT offers solid surface and interrupted surface diamond sharpening products. Both have their advantages for different users but the choice is largely about personal preference and what type of tools you'll be sharpening on your DMT stones. All DMT stones can be used dry or with water, and are made in the USA to the same high standards.
DiaSharp stones have a solid un-interrupted diamond surface on one side of a solid steel backing. They can sharpen pointy and narrow tools, as well as wide irons and chisels. Solid steel construction makes these the heaviest DMT stones, and also the flattest. The extra heft keeps them firmly in place on a non-stick mat, but doesn't travel well - with the exception of the DiaSharp Credit Card sharpeners which fit in a wallet.
Duosharp Stones are the classic patented DMT Polka-Dot Sharpening stones. Stones are two sided, and have an interrupted steel surface on both sides. The recessed dots keep abraded metal dust off the abrasive surface of the diamonds, for very fast sharpening. The dots will catch tools much smaller than 1/4" or anything with a curved surface like a gouge - but their compact construction, light weight, and two-grit configuration make them an excellent choice for many users.
DuoSharp Plus stones add a 3/4" wide uninterrupted surface to the ends of what would otherwise be a classic 8" DuoSharp bench stone. The uninterrupted surface is for sharpening pointy, or narrow tools. Like the regular DuoSharp, these stones are light weight, and travel well. If you regularly sharpen chisels, knives and plane irons, but only occasionally need to sharpen tools narrower than 1/4" the DuoSharp is good option.