Grinding ceramic knives: what should you pay attention to?

High-quality ceramic knives retain their sharpness for a long time because they have a high degree of hardness. But at some point it is with them as well: The cutting force decreases, only by grinding the blade again "fit for new jobs." But how does the regrinding of a ceramic knife work?

Ceramic blades: harder than steel

Ceramic blades are actually often harder than the usual steel knife blades, which is exactly what makes them so popular. Steel is measured in the HRC unit, an abbreviation for Rockwell hardness.

While normal knife blades reach between 52 and 65 HRC, good ceramic blades can even be classified as 67 HRC. That's why it takes a long time for a ceramic blade to actually wear out.

Ceramic has other advantages over steel: It is particularly light, acid-resistant and does not rust. In addition, it is very easy to maintain, because it has a tightly closed surface.

Grind ceramic knives by a specialist

Ceramic blades are very hard, but also very thin at their extreme tip. Here, when sharpening something quickly breaks off, or it creates annoying burrs, which are not so easy to remove.

Most manufacturers recommend their customers to have ceramic knives sharpened by a specialist. Often there is even a free manufacturer service: send in knives and get sharpened back again.

Grind a ceramic knife yourself

Would you still like to grind your ceramic knife yourself? Then please note the following points in order to achieve the best possible result:

  • Use a special diamond sharpener.
  • For easy resharpening, a 1.000 grit is sufficient.
  • Pay attention to a non-slip surface.
  • Use both hands to guide the knife carefully.
  • Put your thumb on the blade side.
  • Grind the outermost tip at a narrow angle between 10 and 15 degrees.
  • For the knife center, an angle of about 60 degrees is sufficient.
  • It is best to process both sides of the knife several times.
  • Feel the fine degree of grinding and let it slowly move up over the blade.
  • In between remove the ceramic dust by blowing or with a damp cloth.
  • When using water, dry everything well afterwards.

Tips & Tricks

Be very careful when grinding for the first time and take your time. First, get a good feel for the material so you can work faster and more efficiently during later sanding cycles.

Video Board: Basic three step knife sharpening: destress the edge + shaping + finishing the apex