DMT (Diamond Machining Technology) 8-in. Dia-Sharp Bench Stone Coarse Sharpener

Tried yesterday, uneven surface, scratches and no rubber pads were provided as show in the pictures, some spots have high diamonds that causes deep starches and one side has ridges. Totally disappointed. Haven't expected that from DMT.

Very good quality sharpening solution. I use it to sharpen plane irons and chisels and I've not seen the slightest sign of fatigue after several months of use. Guaranteed flatness, and no need for lapping... ever. To use, all that is needed is a small amount of liquid to lubricate (the manufacturer recommends water -- glass cleaner is another option with no adverse effects), then sharpen, then wipe off the slurry (the swarf is sign that it's working). The plate is quite heavy, but it helps keeping everything in place while sharpening. Let it dry and store it away. easy. I've found I can obtain results faster by applying very little pressure -- no need to force weight down into the stone to sharpen. There is a small break-in period, after which I started getting bluish halos (photo attached). It's a tell-sign cleaning is due, which can be done easily by a good scrubbing with a toothbrush and some kitchen/sink cleansing powder agent (such as calcium carbonate and sodium carbonate). The surface can also reportedly be cleaned with a high-polymer eraser. Even easier! Very responsive support from the manufacturer. Very satisfied customer! The prices for the coarse, fine, and extra-fine stones fluctuate somewhat, I'd recommend setting a watch.

I own 4 DMT diamond stones. Unfortunately, everyone I have bought before this one has defects. I am happy with this stone though. My extra coarse stone is missing diamond coverage all along the edges and has a big blotch missing in one of the corners. My DMT fine stone has extremely bad grit contamination that you can not only feel, but can hear, when sharpening. So, I was happy when I finally got a DMT stone that didn't have grit contamination and has complete diamond coverage including along the edges. It is unfortunate that it took 4 stones to get a good one. To say DMT's quality control is subpar is an understatement. I kept seeing good reviews and so thought maybe I was getting lemons, just a random bad one. But no. Everyone stone except this one had significant defects. That being said.... even with the defects the stones work well enough and will last. I know it's odd to say so much negative and have a 5 star review. That is simply because this stone was exactly what it should have been. No grit contamination, no missing coverage and a great stone. It cuts fast and leaves a uniform scratch patter. It is well built and will last year's making it a great buy for $50. If you can get a DMT diamond stone without any significant defects, then you're getting a good buy. These stones will last for a very long time if you take care of them and can cut any steel type including super steels like s110v or s90v.

Pessoalmente acho muito agressiva para usar diretamente nas lâminas, pois remove muito material. Estou usando para retificar minhas whetstones da King e da Suehiro e para isso essa pedra diamantada é fantástica. Nunca consegui retificar minhas pedras usando lixas e outros métodos mais baratos então resolvi arriscar. As pedras diamantadas da DMT não são baratas mas valem a pena. Retificou minha King velha de guerra, que acumulava uma barriga considerável depois de mais de 10 anos de uso. Como foi necessário desbastar muito da pedra demorou um pouco (quase 3 horas de trabalho). Mas ao final o trabalho ficou ótimo e a pedra diamantada ainda estava como nova. Recomendo.

This is the best bench stone for sharpening anything! Thick and perfectly flat forever!

Las placas diamantadas DMT son las mejores del mercado. Si se les da un uso inteligente duran toda la vida. Vistas con una lente de aumento, son todo un espectáculo al percibir la uniformidad con la que están distribuídos los diamantes monocristalinos (los de mayor calidad). Esta granulometría "Dia Sharp COARSE" denominado en la página de venta como "Grueso" es la adecuada para el vaciado delicado de cuchillos, antes de afilarlos con piedras de grano más fino. Yo la utilizo humedecida, aplicando muy poca presión, con mucha paciencia. Nada de hincar con fuerza la punta del cuchillo hasta que salten los diamantes por el suelo. Como cualquier herramienta con diamantes, al principio "come mucho material" y después es cuando ya coge su ritmo de trabajo. Al terminar, lavarlas con agua y secarlas con un trapo limpio, esperando que haya perdido todo rastro de humedad antes de guardarlas en su caja. La planitud de la placa es tan buena que se puede utilizar para lapear (rectificar) las piedras de afilado, ya sean naturales o sintéticas, siempre con agua. Por supuesto, no comparar estas placas con similares muy baratas que venden en sitios chinosos on-line. Afilar un cuchillo es un arte que hay que hacer con mucho mimo.