The grit decides on the deduction stone on the Schleferfolg

The higher the grain of a whetstone, the sharper it is. The increase in the grain value describes a larger number of increasingly smaller abrasive particles. Coarse grains start at 240 and the finest honing stones have grain sizes up to 3,000. 1000 grits already produce razor-sharp cutting edges.

Grain size is determined by mesh size

The basic principle when grinding hard materials such as steel is similar in all applications. Coarse pre-grinding is increased by subsequent runs with increasingly fine abrasives until the desired degree of severity is achieved.

The measure of grindability and composition of a whetstone is the grit number. The higher the value, the smaller each individual grain becomes. The basis for the valuation is the unit of measure mesh or mesh size. It derives the values ​​from a sieve that theoretically would pass through single grains with the appropriate mesh size.

Three scales of grit grades

In international trade, there are three different mesh sizes that are used. A simple comparison is not possible because the values ​​are not linear to each other. The three grain scales used are used following the origin of the honing stone. Europe, Japan and the USA share the market.

Some common European grain sizes can be "translated" using grain comparison tables. Typical examples are:

  • 320's in Europe is equivalent to Japanese 600 and US 360 grit
  • 400- in Europe corresponds to US-American 500 grit
  • 500's in Europe equals Japanese 1200 and US 600 grit
  • 800- in Europe corresponds to Japanese 3000- and US-American 1200 grit
  • 1200er in Europe corresponds to Japanese 4000 grit
  • 2000er in Europe corresponds to Japanese 8000er grit

Useful grit areas

The classic universal honing stones for private use usually have two sides. The grains of the coarse side range between 400 and 600 and the finer sides between 900 and 3000 according to European design. Household knives achieve sufficient blade fineness when sharpening up to 1000 grits. Cooking and razor should be finalized with 3000 grit.

Grains can lose up to one hundred percent of their effect due to non-dressed peeling stones and dirt.

Tips & Tricks

When looking for your ideal honing stone, you should always look at the finer side. The coarser grain should be about one-quarter to one-third of the fine grain. This applies to all three scales as long as they are compared with each other.

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