There are three main types of coffee grinders in the market: flat knives, conical knives and ghost teeth. The three types of cutterheads have obvious differences in appearance and slightly different flavors. To grind coffee beans into powder, two cutterheads are needed for crushing and cutting. The distance between the two cutterheads determines the thickness of the powder. The closer it is, the finer it is, and the farther it is, the thicker it is. This article will teach you how to grind coffee beans into powder. How to identify the grinder's cutterhead.
Flat knives
The flat knives is a common cutter head structure. The cutter head seat is made of many processed grooves with a slope. The sharp knife peak between the two grooves plays the role of cutting the coffee beans. Therefore, the powder of the flat knife is mostly Flaky. The flavor will emphasize the aroma in the first part and the layers in the middle part, and the taste will be smoother. Flat knives cutter head: The particles of the flat knife will appear larger at certain angles because they will appear flaky. Most of the freshly ground coffee machines on the market now use flat knives.
Conical knives
Conical knives are another common structure, consisting of an upper and lower cutterhead. If the cutterhead is well designed, it can effectively squeeze the coffee beans downward to improve the grinding efficiency. The coffee powder will appear granular. In terms of flavor, the middle layer and the ending are thicker. Hand-cranked grinders also use conical knives as the mainstream. When the lower blade base of the cone cutter rotates, the beans will be squeezed downwards and crushed, and the powder from the cone cutter will appear granular.
Ghost teeth
Ghost teeth are a rare cutterhead structure. They are called ghost teeth because the cutterhead has many protruding knife peaks. Two knife holders with the same structure are put together to tear and crush coffee beans, and the coffee powder is also granular. , it seems to be more even than the conical knives , and the flavor is very close to the conical knives , but the finish will be thicker. If you like the rich taste of old-fashioned coffee, Ghost teeth will be your best choice. On the basis of comparison of the same grade, the price will be more expensive. The Ghost Teeth cutterhead has many protrusions on the blade holder, hence its name. The powder produced by Ghost Teeth has more even particles.
Conclusion
In principle, conical and flat knives are suitable for all coffee brewing methods, including Italian coffee. However, if you want to use it in an Italian coffee machine, you need to specially select it, because under brewing with up to 9 bar water pressure, the coffee powder must reach two Key points: 1. Fine enough, 2. The powder should be average enough, so the threshold of the grinder is relatively high. The powder ground is still not fine enough. Ghost teeth cannot grind very finely due to the structure of the cutterhead, so they are not suitable for use in coffee machines.
Post time: Jun-20-2024
