The ideal time to grind coffee is before brewing.

The principle of grinding

1. The ideal time to grind coffee is before brewing.

two。 The degree of grinding that is suitable for the cooking method should be selected, that is, the thickness of what utensils are used.

3. The coffee powder after grinding should be uniform, and if it is not uniform, it will prove that the bean grinder blade is worn.

4. The temperature produced during grinding should be low. If grinding heat is generated, a semi-dry towel should be put on the motor to cool down.

According to the size of coffee beans, the grinding methods can be divided into rough grinding, medium grinding and fine grinding.

Use the appropriate grinding method according to the coffee utensils. There is also medium fine grinding or very fine grinding (powdered coffee powder) which is finer than fine grinding.

1. Fine grind: the particles are fine, the same size as sugar.

2. Medium grind: the size of granules is thicker than granulated sugar and finer than coarse white sugar.

3. Rough grinding (Regular grind): the particles are thick, the same size as coarse sugar.

The grinding tool for coffee beans is a bean grinder. There are three kinds of bean grinders:

(1) Manual rotary bean grinder for household use. It is suitable for leisure people with small demand, large particles and plenty of time.

(2) Electric bean grinder for household use. Can be ground into a variety of particle size coffee powder, can be ground out of 6 people at a time.

(3) Professional use of electric bean grinder. For commercial use, about a pound of coffee powder can be ground at a time.

So if you use a family-style manual bean grinder, you should rotate gently so that it does not produce friction heat as much as possible. To sum up, if you consider the quality, quantity, time and convenience of grinding beans, the use of electric bean grinders for home use will be the best choice.

The most common thing on the market is the sawtooth electric bean grinder. There are two types of sawtooth grinders: one is a planar sawtooth knife and the other is a three-dimensional conical sawtooth knife.

(1) Planar serrated cutter

It consists of two annular blades, and the circumference is covered with sharp jagged teeth. After startup, coffee beans are taken between blades and instantly cut and crushed into fine particles, with high speed and uniform particles, so almost all commercial large bean grinders are used.

(2) three-dimensional conical serrated cutter

It is composed of two pieces of tapered iron, the surface of the tapered iron is covered with sawtooth, the friction temperature caused by the conical sawtooth knife is the lowest, and it can form uniform grinding, that is, the speed is slow, so it is often used in household bean grinders.