What is a rotary blade in a coffee grinder?

Features of rotary coffee grinders

In any household appliance you can find a number of characteristic features.

In relation to review models, they are as follows:

• Believe me, more than a dozen rotary coffee grinders have passed through my hands, and these particular samples are distinguished by quite decent build quality. You don’t even have to look at the range of competing manufacturers;
• I saw the simplest design - in practice, this significantly reduces the risk of breakdowns, and if this happens, it makes repairs easier;
• The principle of operation is the rotation of rotary knives. Unlike millstones, they do not grind, but crush coffee beans. You understand that only the best coffee grinders are capable of crushing dense grains into flour.

Rotary type coffee grinder

So, first, let's talk about the containers of this type of machine, into which you need to pour coffee beans for grinding. They have knives that, after turning on the coffee grinder, begin to rotate quickly and grind the beans. As for the degree of grinding, it depends on how long the grinding process itself will take. Fine grinds require more grinding time.

If you decide to choose a rotary device, then be sure to pay attention to the following characteristics:

1. First of all, find out about the engine power. Basically, the larger the container into which the raw materials are loaded, the more power the grinder itself has. But imagine, a technique that does not have very high power is also not bad, it can grind grains into the smallest crumbs and this process will only take a few seconds more. If the device has excessively high power, and you need a fine grind (for example, for Turkish coffee), then when grinding for a relatively long time, the powder will overheat and may burn. As a result of overheating, the coffee will not please you with a pleasant taste; you will only feel bitterness. The optimal power for a rotary coffee grinder can be considered to be 180 watts.
2. Next, you should pay attention to the material that was used to make the body of the equipment. The fact is that the life of the coffee grinder depends on the material itself. For example, parts for which plastic was used tend to break under intensive use. The most durable coffee grinders are those made from stainless steel. Of course, they have a higher price, unlike plastic models.
3. The capacity of the bowl plays an important role. Containers may have different capacities. To brew one serving of espresso, 7 g of ground coffee is enough. If we talk about a dispenser, a rotary coffee grinder does not have one, so the required number of beans is measured manually. You should not leave coffee in the cup for more than 30 minutes. Otherwise, the grains will lose their aroma.

Advantages and disadvantages

Now I will tell you what significant advantages and disadvantages you can count on when buying such household appliances.

The general advantages are:

• versatility - if you want, you can grind everything you need;
• convenience + compactness – equipment of this type is most appropriate in everyday life, including in the context of mobility and storage;
• you will get the ground powder quickly enough;
• all miracles are available at a fabulous price;
• in some places you can count on a decent range of options;
• maintainability - any smart craftsman can repair a coffee grinder, and for pennies.

The disadvantages can be described as follows:

• Rotary coffee grinders are not the device that true coffee lovers need;
• Ergonomics are not fully thought out everywhere, which I will discuss in detail in the practical description.

Selection factors

To choose the best coffee grinder for yourself, you should focus not on the advice of your neighbor Aunt Masha, but on the technical characteristics.

My expert experience suggests the following:

• power - do not chase maximum performance. The optimal result is achieved at 150-180 W;
• capacity - judge logically: the more coffee you need to get at a time, the larger the volume of the bowl should be;
• switching on when the cover is removed is one of the options that guarantees safe operation;
• pulse mode + overheat protection – these are your functions if you want the device not to break down for as long as possible;
• timer – this thing will allow you to grind a measured amount of coffee at a time.

Bosch MKM 6003

The Bosch MKM 6003 coffee grinder is a wonderful option for a small and high-quality coffee grinder.

The coffee maker has a rotary bean grinding system. Stainless steel blades guarantee durability.

The coffee maker is easy to use and does not require special skills; the user’s only task is to pour the beans into the working bowl, close the lid and turn on the machine by pressing a button.

Inside the body there is a metal bowl and a knife; the bowl has a large angle of inclination, which is good for high-quality grinding. The volume of the bowl is quite spacious and equal to 75 grams . This is enough for about 12 standard Americano coffees.

The power-on lock function when the cover is removed is a very useful feature that makes the device safer during operation.

The shape of the coffee grinder is cylindrical, on the top there is a transparent lid on which there is a start button for the coffee grinder, which puts the coffee grinder into action.

There is no grinding adjustment; when you press the button, you need to hold it until the end of the process. This way you can control the degree of grinding.

The coffee grinder body is made of plastic.

The coffee grinder was made in Slovenia.

Power 180 Watt. This makes it possible to grind coffee for 2 minutes but no more. There is an instruction about this on the packaging. Therefore, you should not overuse it so that the coffee grinder does not fail prematurely.

Advantages

Advantages of the presented device:

• Reliable
• Easy to operate
• Power 180 W
• Stainless steel blade for precise and high-quality grinding.
• Grind only with the lid closed.
• Safe shutdown.
• Capacity 75 g.
• Country of origin Slovenia
• Transparent lid for process control
• Quiet operation
• Compact
• Sustainable

The coffee grinder is miniature in size, it takes up very little space, I store it on the closet shelf. This baby is also convenient to use; you can grasp it with one hand.

The coffee grinder stands on 4 convex plastic legs at the bottom. The coffee grinder is quite stable, it “stands firmly on its feet.” In working condition, it does not wobble, does not move, does not vibrate.

Flaws

Disadvantages of the device:

• Product may spill out of the lid
• The lid gets scratched and loses its transparency
• No cord winder
• Inconvenient to clean

There is no device for winding the cord , without it it is inconvenient to store the coffee grinder. This is a significant omission from the manufacturer; now in technology they try to hide the cord.

The plastic on the lid is thin, but practice shows that it is durable; it did not crack or break during the operation of the coffee grinder, although it was slightly scratched by the grains.

I didn’t like that the lid doesn’t lock onto the base of the coffee grinder; there are no grooves or threads for this. The lid is simply placed on top of the body.

The coffee grinder is inconvenient to clean; the bowl cannot be removed

Peculiarities

Among the features are its small size and stability. The device can be held with one hand during operation without any inconvenience, especially since it does not dance or move on the table during operation.

Only roasted coffee beans can be ground in a coffee grinder . You cannot grind anything else in it; this is shown in small drawings on the transparent lid.

The working container can only be wiped with a dry cloth or cleaned with a brush. I wipe the bowl with a damp cloth, it’s a pity that it can’t be rinsed under running water.

Video review

A short video review of this coffee grinder in the video:

Video presentation of this coffee grinder and its features:

Results

The device has its own characteristics. Most suitable for home use; it is not suitable for use in a cafe or bar, although there are reviews of use in a small office. This is due to the low performance of the device and the inability to use it continuously. The device is stable and has protection so that children cannot get hurt, but the manufacturer still recommends putting the device in a secluded place.

Briefly about the rotary type

In a rotary coffee grinder, the containers into which the beans are poured for grinding are equipped with knives. When the machine is turned on, these knives rotate quickly and chop the grains. The degree of grinding depends on its duration. To make the particles smaller, you need to grind a little longer.

When choosing a rotary coffee grinder, you need to consider the following characteristics:

1. Motor power . This figure varies from 100 W to 270 W. Often, the larger the volume of the loading container, the greater the power of the coffee grinder. The optimal power is 180 W. But a device with a power of 130 W will also grind grains well, only the process may last a couple of seconds longer. If the power of the appliance is too high, the beans may char and the coffee will have an unpleasant bitter taste.
2. Material of the device body. The service life of the device largely depends on the material. Plastic parts often break. More durable – stainless steel coffee grinders. But they are more expensive than plastic models.
3. Container capacity. Containers come in capacities from 40 to 120 grams. For one serving of espresso, the standard requires 7 grams of coffee. There is no dispenser in the device, so you need to measure the required amount of grains yourself. It is not recommended to store coffee in a container for longer than half an hour. Otherwise, it will not differ from the purchased ground one, and some of the aroma will disappear. Ideally, you should grind your coffee before preparing it.

You may also be interested in information about what a Turkish coffee maker looks like and how it is used, and how to choose the best planetary mixer.

The video shows how to use the device correctly:

Rotary coffee grinders can be equipped with additional functions:

1. Double knives will increase the grinding speed.
2. A tilted bowl will ensure uniformity and intensity of grinding.
3. The grind adjustment dial will adjust the grind (coarse, medium or fine).
4. Overheat protection. The motor automatically turns off when overheated, so it will not burn out, thus increasing the service life of the device.

Most rotary coffee grinders have an activation lock when the lid is open. The device will not turn on until the lid is closed tightly. This important feature protects your hands from injury and prevents coffee from spilling.

You may also be interested in information on how to brew coffee beans.

Some models have a device for winding the cord; it can also be automatic, which makes the device more convenient to use. Check this feature when purchasing the device. The cord should be wound evenly and not snag. Make sure that the length of the cord suits you.

You may also be interested in information about what a delonghi carob coffee maker with cappuccino maker looks like.

Pros of a rotary coffee grinder:

1. Convenient to use for grinding small amounts of grains.
2. Compactness. Its small size and weight make it easy to take it with you if necessary. Doesn't take up much space in the kitchen.
3. Affordable price.

Cons of a rotary coffee grinder:

1. Inhomogeneity of grinding.
2. Lack of dispenser. You need to determine the required portion of grains yourself and add them manually. Usually 1 tbsp is used for one cup of coffee. l. (without top) grains.
3. Beans and ground coffee are in one container. It is inconvenient to pick up the powder because of the knives. It is better to choose a model with a removable container to make it convenient to pour out the ground coffee.
4. The motor burns out quite quickly, usually after one year of service. Cannot be repaired.
5. Plastic parts of the case often break.
6. They are not suitable for grinding other products, for example, cereals, peppers, nuts, because they cannot be washed well, the smell will remain and will affect the taste and aroma of coffee.

Rolsen RCG-150L

True connoisseurs of real coffee have long chosen the new Rolsen RCG-150L coffee grinder for grinding beans.

Thanks to the rotating stainless steel knives, the grinding process takes only a few seconds.

The RCG-150L model has the ability to automatically select the grinding degree. You can grind up to 80 grams of coffee at a time, and this is enough for several cups of aromatic coffee.

The model pleases with its pleasant, modern design and small size, which will allow it to find a place in your kitchen. The coffee grinder lid is made of transparent material. Through it you can observe the coffee grinding process.

The device is equipped with a function that automatically blocks the coffee grinder from turning on when the lid is removed. The device also has a pulse operating mode for better grinding.

Advantages

This coffee grinder boasts the following advantages:

• inexpensive,
• easy to use,
• housing made of high quality plastic,
• 2 operating modes – pulse and main with adjustable grinding degree,
• roomy,
• metal bowl inside,
• it’s convenient to hide the cord and there’s just a wonderful groove for passing it through,
• grinds well and efficiently,
• lid with transparent window,
• lid lock.

Flaws

The coffee grinder has disadvantages that do not affect the quality of the resulting product:

• indicator lights are faintly visible,
• makes a lot of noise and vibrates
• it suddenly starts working, without “swinging”.
• The plastic cover may be scratched by the grain.

Peculiarities

By pressing the button we select the type of grinding, when selected, the indicator light under the value lights up, then we simply lower our hand and wait, after a couple of seconds it begins to grind the contents.

In addition to this mode, there is an induction mode, which turns on when you hold the button on the panel.

The coffee grinder should work for no more than 30 seconds , then a break, which should be at least one minute, and in case of overheating, a break of 10 minutes, but it is better not to let it get to that point.

There is no need to wash it, just wipe it with a damp cloth.

Bottom line

The Rolsen RCG-150L coffee grinder is an example of when quality is higher than price.

This device will fit well into the kitchen of a small family or the buffet of a small office. It is not suitable for use in bars and restaurants, but can be used in small buffets, where there is little traffic and there is no need to constantly grind coffee.

According to user reviews, the one-year warranty is given for a reason; the coffee grinder has been successfully used for a long time without any complaints.

Additional functions of rotary coffee grinders

Devices of this type may have additional functions, depending on the price and imagination of the manufacturer.

For example, this technique can surprise its owner with double knives, which increases the grinding speed.

Using the grinding adjustment control, you can grind as much as necessary. Typically, the adjustment has three positions: fine grinding, medium and coarse.

Advanced models have protection against motor overheating. The motor turns off automatically when it starts to overheat. This indicates that the device will not burn out and will serve you for a long time.

Most rotary appliances have an activation lock when the lid is open. Therefore, the equipment will not be able to turn on if you do not close the lid properly. Believe me, this feature is very important, as your hands will be protected from injury and you will not know what spilled coffee is.

Some models may feature a device that winds the cord. It can work automatically, making the device more convenient to use. You should definitely check this option when purchasing equipment. Make sure that the cord is wound evenly and does not get stuck. And check the length of the cord, it should suit you completely.

pros

• This type of technology is very easy to use. This coffee grinder allows you to quickly grind a small amount of beans;
• the equipment is compact, small in size, lightweight, so you can take it with you on the road;
• The device has an affordable price.

Minuses

• the technique may disappoint you with uneven grinding;
• it does not have a dispenser, that is, you will weigh out the required amount of beans yourself and send them into the cup manually;
• coffee that has already been ground and unground beans remain in one bowl. It is very inconvenient to choose the powder, since there are knives in the bowl. It is better to buy models that have removable containers; ground grains can be conveniently poured into them;
• If the motor in this device burns out, it is usually impossible to repair it;
• The case is often subject to breakage, since it is made of plastic. This technique is not suitable for grinding other products, for example, cereals, peppers, nuts, since it is not possible to wash it thoroughly, and the smell will remain, which will naturally affect the aroma and taste of the finished coffee.

Coffee grinders Endever Costa-1053 and Endever Costa-1054

Coffee grinders Endever Costa-1053 and Endever Costa-1054 are blade or rotary type coffee grinders. These devices are basically identical, so we will consider them as one model using the example of Endever Costa-1053.

It is a cylinder with a motor inside. At the top of the coffee grinder there is a special container for beans.

There is a rotating knife at the bottom of the container. The knife is made of high quality hardened steel. During operation, it rotates at speeds of up to 15,000 rpm, thereby grinding coffee beans.

Such a high rotation speed and, accordingly, high performance is ensured by power up to 250 W.

The Endever Costa-1053 coffee grinder has a pulse operating principle, that is, the knife rotates only while you hold your hand on the button.

With this you can easily control the degree of grinding. In other words, the longer the coffee grinder is in working condition, the finer the beans will be ground.

The coffee grinder body is made of food-grade ABS plastic and comes in several classic colors, which will help you choose the most suitable option for your kitchen. The laconic design of the coffee grinders will save space.

Advantages and characteristics

Advantages of the device:

• Product weight: 100 g
• Engine overheat protection
• High power
• Steel knives
• High quality ABS plastic
• Convenient power button
• Modern design
• Easy to use
• Easy to wash

The Endever Costa coffee grinder can easily cope with grinding cereals, nuts, spices, crackers, seasonings and will become not just a coffee grinder, but an indispensable assistant in the kitchen.

Flaws

Disadvantages of this model:

• Plastic case
• Noisy
• Plastic cover may be scratched by grains
• Lid not fitting tightly
• There is no timer or grind adjustment.

Bottom line

The device has been poorly studied on the market due to its novelty. Ideal for use at home. The plastic case is well made, but the device is a bit noisy.

It is also possible to use a small office in small buffets , where up to 12-15 people work. For lovers of fully automatic functionality, this coffee grinder is not suitable, since the duration of operation depends entirely on the duration of pressing the start button.

What can you grind in a burr coffee grinder?

The mechanism of this coffee grinder is based on metal millstones. They spin towards each other and grind everything that is between them. The smaller the gap between them and the higher the rotation speed, the finer the grind.

Burr coffee grinders come in conical and cylindrical types. Cone ones cope well with different types of products and do not overheat. Cylindrical ones are usually more powerful, but also more vulnerable.

In a burr grinder you can grind:

• cereals;
• flax seeds, sesame seeds, pumpkin seeds;
• beans - coffee and cocoa, as well as peas and beans;
• breadcrumbs;
• sea ​​salt;
• spices: black pepper, cinnamon, vanilla, mustard seeds;
• dry herbs;
• dried mushrooms.

What should not be ground in a burr coffee grinder:

• sugar;
• ice;
• raw and juicy foods, the remains of which will settle on the parts of the mechanism.

conclusions

Having worked through a whole bunch of technical and practical properties, we came to quite logical conclusions.

Their essence is as follows:

• ENDEVER COSTA-1054 is the simplest sample that can be called a real kitchen horse. Take it if you plan to grind sugar into powder, oatmeal into flour, nuts for pralines more often than coffee;
• Rolsen RCG-150L is an excellent device available at a great price. This is where we can talk about the most appropriate choice for those who want to frequently grind coffee in the morning;
• Bosch MKM 6000/6003 - the purchase will be appropriate if you do not want to start grinding several times a day. The model is an option for those who drink coffee occasionally and with relish.