Don't know what kind of grinder to buy? Cone knife, flat knife, ghost tooth knife once understand

For professional baristas, please follow the coffee workshop (Wechat official account cafe_style)

The bean grinder plays a low-key but important role in the coffee brewing process. Usually coffee novices do not attach great importance to the bean grinder and buy ground coffee powder directly for convenience, but in fact, the shelf life of coffee after roasting is very short, only about a month, let alone shorter after grinding, because the coffee powder has a larger contact area with the air, which makes the oxidation faster, and the aroma begins to lose from the moment it is ground.

This is why to brew a good cup of coffee, we must use "freshly ground", "freshly ground" coffee powder! This is so important, please allow the editor to say it three times!

What is a good bean grinder? A good bean grinder requires the following three points:

No. 1: grind evenly. This is the most important point, because if the grinding is not uniform, the subsequent extraction will be uneven, resulting in a mixed flavor in the final cup. The most common problem is that fine powder is produced during rough grinding, which leads to bitter coffee. Although the best grinder will inevitably have the phenomenon of fine powder, but some low-end bean grinder fine powder is very obvious.

No. 2: fever control is good. The grinder will heat up when it is running, but because the aromatic substances in the coffee powder are very volatile, it will accelerate especially when it is hot. A good grinder can control the heat within a certain range through reasonable torque, thus greatly reducing such volatilization. However, if people drink their own coffee at home, if they only grind a small amount of beans, the impact of fever is small and can be ignored.

No. 3: high grinding efficiency. There is no need to say much about this point. It must be the more time-saving and labor-saving the better. But the editor would like to remind you that some low-end grinders simply rely on increasing rotational speed to improve efficiency, but this will cause a large amount of heat generated in the second point, which is counterproductive. A good bean grinder generally achieves the balance of heat production and efficiency with low speed and high torque.

What kinds of bean grinders do you have? The type of bean grinder is divided into manual type and electric type. I will show you where the advantages and disadvantages are.

Manual bean grinder, or hand bean grinder, as the name implies, is a do-it-yourself mill. Although it is more time-consuming and labor-consuming, it is cheaper, and you can also move your arm by the way. If you are like the editor, only occasionally make a cup of coffee to relax, then the hand grinder is more suitable! You can grind about 20 grams at a time, not much, not much, just right ~ but if you want to cook a lot, can't you shake it by hand? It's not impossible, but you'll need an arm with strong muscle endurance!

Relatively speaking, the grinding speed of the electric bean grinder is much faster and labor-saving, and the price will of course be higher, so it is suitable for friends with thicker pockets. However, the uniformity and fine powder condition of the electric grinding machine depends on the blade of the bean grinder. Generally speaking, there are three kinds of blades: flat knife, conical knife, ghost tooth knife.

In terms of choice, hand-brewed coffee is the main brew, and conical knives or ghost teeth are usually recommended. Because the cone knife grinding shape is block, the path for coffee powder to absorb water is longer, the powder will not absorb water too early, and it is made in China or Taiwan. The price of the cone knife is also more cost-effective. If you have a budget, you can consider Nissan's small Fuji ghost tooth cutter head (molar cutter head), but the editor still prefers the flavor of cone knife. If the budget is not so high, but want to have better quality, you can also consider using a powder sieve to retain the shape of cone knife and flat knife, but it is also a good choice to get rid of irregular fine powder.

If it is mainly an Italian coffee machine, it is recommended that you can buy a flat knife with a little more budget, the grinding is more average, and the extraction is faster, which is in line with the characteristics of Espresso.

The following editor simply gives you an introduction and comparison, so that friends who plan to buy electric bean grinders can refer to it!

By the way, let the editor mention a little more, there is often a kind of propeller-type bean grinder on the market, the price is not expensive, but the editor has to say. This is really not recommended! This kind of bean grinder, commonly known as bean chopping machine, should be able to imagine that beans are chopped with it. Although the action is fast, it is conceivable that the evenness is very poor. Some beans are cut dozens of knives and some are cut once or twice, which greatly affects the extraction during cooking, resulting in inconsistent flavor, or miscellaneous smell, and so on.

Above these little knowledge of bean grinder and selection tips for your reference! I hope everyone can buy ideal and easy-to-use coffee and make the best coffee for themselves and their families.