The Italian bean grinder is adjusted to the finest why the ground beans are still very thick.

The Italian bean grinder is adjusted to the finest why the ground beans are still very thick.

The single product pursues that the particles are of a certain size and uniform, and the high-end ones generally use ghost tooth grinding plates with a small number of adjusting segments (because there is no need for so many)

Esp pursues that the particles are fine and uniform enough, generally using parallel cutters, and high-end commercial mills also use conical cutters ~ because esp is extracted under high pressure and high temperature, the change of powder size has a great influence on the product, which requires fine-tuning function, and generally has stepless fine-tuning (this is not available in single-product bean grinders).

Of course, there are also both, such as Baratza preciso, conical knife, with 40-level initial adjustment × 11-level fine tuning, which is equivalent to stepless adjustment, compatible with esp and individual products, and a little more high-end.

But the needle has no two ends, high-end, commercial, ghost tooth grinding plate is suitable for single product, while cone knife and flat knife are suitable for esp, this is recognized, different bean grinding machine structure of grinding plate is different, of course, it does not matter if the requirements are not high.

When the coffee bean enters the grinder, the blade in the grinder will crush the coffee bean into powder. The smaller the distance between the blade and the blade, the smaller the coffee beans will be ground into smaller particles. The finer the grinding particles are, the tighter they are, and the more difficult it is for the water to pass through, thus greatly prolonging the extraction time. On the contrary, if the distance between the blades increases, the ground particles will become rougher, the flow of water will be easier to pass through, and the extraction time will be faster. To take a simple example, like stones and fine sand, water flows much faster through stones than fine sand, because there is more space between the stones for the flow of water to pass quickly. Therefore, the correct grinding is very important, and the particle size directly affects the quality of the extraction.