Commercial coffee beans professional bean grinder selection and operation guide _ how to grind commercial coffee beans

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There is no doubt about the importance of commercial bean grinders for Italian espresso. The quality of the bean grinder directly affects the quality of coffee. For those who are new to commercial bean grinders, the first thing you need to understand is that commercial coffee bean grinders do not grind coffee beans, but cut them evenly to fine powder. No matter what kind of bean grinder, the last thing you want to see is the extra heat generated by the grinder. The less calories generated, the less the effect of the bean grinder on the final quality of coffee; conversely, the more calories, the taste of coffee will change. Of course, heat will be generated when objects are rubbed, but people can minimize the heat generated by grinding by improving the design of the bean grinder. This is the direction of many bean grinder manufacturers.

Before buying a special grinder for commercial coffee beans, we recommend that buyers first know the volume of the grinder. In this article, we will explain in detail how to select and use commercial bean grinders from the aspects of blades, parameter regulators and components of bean grinders.

I. the material of the grinding blade

First of all, there are two reasons why the bean grinder produces excess heat: one is that the actual grinding capacity exceeds the original bearing range of the bean grinder, and the other is that the blade is worn or blunted. Bean grinders on the market generally use blades of three materials, namely, ceramic blades, steel blades and titanium alloy blades. Where:

1. Ceramic blade

This kind of blade absorbs heat well and is durable. Bean grinders with ceramic blades are not common and are often used to grind coffee grinders with a single cup of powder at one time, such as La Marzocco Swift bean grinders. Some fully automatic Italian espresso machines also use ceramic blades, such as the Evolution ASP coffee machine designed by Franke Coffee Systems. The only disadvantage of the ceramic blade is that it is very fragile. If impurities other than coffee beans enter the bean grinder, the consequences will be unimaginable.

two。 Steel blade

Because of the low production cost, steel blades are the most common. Once overused, steel blades are extremely easy to generate heat. Some bean mill manufacturers use hardened steel to make blades to extend their service life and reduce the heat generated during grinding. Some very large volume grinding machines use oversized steel blades to improve grinding efficiency. The service life of steel blades is shorter than that of other materials.

3. Titanium alloy insert

The service life of titanium alloy blade is three times that of ordinary steel blade, and it is easy to dissipate heat and is not easy to be damaged. In addition, the cutting surface thread of the blade is also more durable and durable than other material blades. Yes, this kind of blade is very expensive to produce. Only a few bean grinders on the market, such as Nuova Simonelli Mythos Plus and Mythos Clima Pro, use blades of this material.

Second, the shape of the grinding blade

In general, there are two types of blade shapes: flat blades and tapered blades. Where:

1. Parallel blade

Flat blades have lower production costs and higher penetration rates. At the time of purchase, it should be noted that larger bean grinders should be equipped with larger flat blades.

two。 Tapered blade

The tapered piece is mostly made of steel and its shape is designed to prolong the service life of the blade. Conical blades are often used in low-speed bean grinders. Like flat blades, larger bean grinders should be equipped with larger tapered blades.

Third, grinding parameter regulator

At different times of the day, you need to adjust your grinding parameters and the thickness of coffee powder according to the changing characteristics of coffee to ensure a better quality of coffee. The temperature and humidity are lower in the morning, but the room temperature and humidity will increase over time, and you need to adjust the bean grinder in time to ensure that the quality of the coffee does not change. In addition, the heat generated by the bean grinder itself will also have an impact on the quality of coffee.

You should use your short leisure time to adjust your bean grinder according to your taste preferences. There are three kinds of parameter regulators for commercial bean grinders:

1. Micrometer adjusting knob

This kind of regulator is the easiest to operate. The micrometer adjustment knob can rotate freely. Once the knob is rotated, the gap between the bottom blade and the upper blade will change. Of course, there are exceptions. The regulator of the La Marzocco Swift bean mill is equipped with a special set of linkage gears, which can freely adjust the upper blade. The micrometer adjustment knob allows you to accurately grasp the degree of grinding of coffee.

two。 Adjusting knob

The adjustment knob looks the same as the micrometer adjustment knob, but it adjusts the upper blade. Bean grinders equipped with this regulator, such as the Kryo bean mill from Rancilio, usually use a small linkage gear to adjust the grinding blade. Many people think that this regulator is very accurate, but the problem is that it does not rotate freely. The regulator is equipped with a positioning pin, which can only be adjusted by inserting the positioning pin. But compared with the latter two more traditional regulators, the accuracy of the adjusting knob is more accurate, and the small linkage gear allows you to make very subtle adjustments.

3. Smooth adjusting bayonet

The smooth adjustment bayonet is very common and can rotate as freely as the micrometer adjustment knob. A set of springs is arranged between the upper blade and the lower blade of the bean grinder. When turning the bayonet, the distance between the upper and lower blades will change, so as to adjust the thickness of the grinding. However, compared with the advanced micrometer adjustment knob, this kind of regulator is more clumsy and inconvenient to use.

4. Traditional adjusting bayonet

This is the most traditional regulator. When using the traditional adjustment bayonet, you must first pull out the positioning pin and insert the positioning pin after turning the regulator to the appropriate position to complete the adjustment. The accuracy of this regulator is very limited. The grinding parameters are designed by the manufacturer in advance, so the user can not adjust the thickness of the coffee powder at will.

IV. Quantifier

Next, let's introduce the component of the bean grinder. There are two kinds of components: electronic component and manual component. Where:

1. Manual quantifier

After grinding, the coffee powder enters the powder bin, then manually enters the filter bowl, and then it is pressed and made. Manual dispensers are usually equipped with a lever, and each time you turn the lever, you can get a certain amount of coffee powder from the powder cartridge. In general, the amount of powder dialed once is suitable for making one cup of coffee, and twice is suitable for making two cups. The manual quantifier is usually adjustable to adjust the amount of powder produced by each lever. The maximum powder output of an ordinary manual quantifier is 9 grams at a time.

When using a bean grinder with a manual dispenser, be sure to have coffee powder of 1x2 volume in the powder compartment at all times. At the end of the day, be sure to pour out the unused coffee powder. But the problem with this kind of meter is that sometimes there is a gap between the coffee powder, and the excess air can make it extremely difficult to master the amount of powder.

two。 Electronic component

The amount of powder output of the electronic meter is set in advance, and the operator can get a fixed amount of coffee powder each time. Modern electronic bean grinders are usually equipped with this kind of quantifier. The operation panel on the bean grinder can pre-store 2-3 settings. Of course, if baristas have special needs, they can also produce powder manually. General electronic bean grinders are equipped with LCD display screen and control panel, the program is very simple and convenient. In general, the electronic meter adjusts the amount of powder by controlling the time of pulverization. Of course, there are exceptions. The Swift bean grinder produced by La Marzocco Company adjusts the amount of coffee powder by controlling the height of coffee powder. The operator only needs to put the handle into the predetermined position, and the quantifier will produce powder. The bean grinder produced by Mazzer requires the operator to press the button to produce powder.

● commercial coffee bean brand recommendation

Qianjie coffee roasted single product-Italian commercial coffee beans: Yega Sheffield Coffee, Kenya AA Coffee, Panamanian Flower Butterfly Coffee, etc., are fully guaranteed in brand and quality, suitable for all kinds of utensils. And more importantly, the performance-to-price ratio is extremely high, a pack of half a pound 227 grams, the price is only 80-90 yuan. According to the calculation of 15 grams of powder per cup of hand-brewed coffee, 15 cups of coffee can be made in a bag, and each cup of coffee costs only about 6 yuan, which is very cost-effective for the normal price of 30 or 40 yuan a cup in a cafe.

Qianjie coffee: Guangzhou bakery, the store is small but a variety of beans, you can find a variety of unknown beans, but also provide online store services. Https://shop104210103.taobao.com