WHY CBN WHEELS NOT DIAMOND WHEELS FOR KNIFE SHARPENING ON TORMEK

With the development of knife sharpening industry, more and more people want to get new technology grinding wheels, then the diamond & CBN grinding wheels are introduced to knife sharpening industry, but new questions come up: which one is more suitable, diamond wheels or CBN wheels？Different people have different understanding, different companies also have different understanding.

What I suggest is CBN wheel.

Today I would like to express why.

As the CBN wheels suppliers for the knife sharpening industry, we must give the right opinion. Most people think that the diamond is much more harder than CBN, so the diamond is better than CBN, this opinion is not right indeed. Based on common knowledge of physics, everyone knows the diamond is just the “C” element, the knife is of steel. For the steel, the basic element is”Fe”, when diamond grinds the steel, “C” +”Fe” will occur chemical reaction. The products of chemical reactions will cover the surface of diamonds, and block the diamond and knife. With time goes on, this phenomenon is increasing obviouly until the diamond lose the sharpness absolutely, that is, when you start using diamond wheel to grind the steel knife, of course it can work, but as times goes on, the sharpness is worse and worse. Based on our experience, after sharpening 30-50 pieces of knives, the sharpness will come down tremendously. No more than 100 pieces of knives, the diamond wheels lose the sharpness absolutely. Then the life of diamond wheels end. Though the diamond wheels’ life ends, but the diamond grain will not be worn, just the products of chemical reactions will cover the surface of diamonds blocking the grinding part totally. This is why diamond wheels can’t be used for knife sharpening. The conclusion has no connection with the grinder speed, no matter is 100RPM or 3000RPM.