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Blade Grinder - Why You Shouldn't Use One

Blade grinders have a blade that looks like propellers (think blenders). They are used to chop Bistro Electric Coffee grinder beans. They are less expensive than burr grinders, and are easy to clean but they do not produce uniform grounds and can cause over-extraction and bitterness in your brew.

A top-quality coffee beans and grinder experience requires uniform distribution of particles which can only be achieved by using the use of a burr grinder. This is the reason why coffee lovers hate them.

Inconsistent Grinds

If you've used a grinder with a blade for a long time, the chances are your grinding results have become inconsistent. The machine is likely to wear out and dull. As the grinder gets older, it will produce different-sized pieces of beans. This can result in different degrees of coarseness. It's a challenge for your coffee brewer to get the same, balanced taste with these different-sized particles.

A blade grinder breaks beans using a rotating blade that resembles an engine. It is basically a way of cutting beans into smaller and smaller chunks, which are then dropped through a screen into a catcher. This technique is efficient however it's not the best grind possible for your brew. A better alternative is the burr grinder. A burr grinder is a much bigger machine, with a large motor and two grinding burrs. The burrs can be placed at a specific distance, which will determine the degree of coarseness of the coffee being ground.

If the burrs are too close, they will pulverize rather than cut the beans. The result is a more fine more refined, less coarse ground. They can also be brittle, which can affect the flavor of your coffee. On the other side if the burrs are spaced too separated, they could produce large chunks of coarsely ground coffee. It is essential to select a grinder that has a setting that matches the coarseness you desire.

A sharp, properly adjusted blade will produce an even and fine grind for your coffee. If you notice your grind becoming increasingly more uneven, it's a good idea to replace the blade or burrs. If you haven't yet done so, you must also change the grind setting to achieve more even grinding.

If your grinder produces clumped-up grounds it could be a sign that the blades are worn out or damaged. The clumping happens because small particles adhere to each other and larger pieces of ground form, creating larger granules which don't dissolve in water. This happens more frequently as your burrs get duller.

Uneven Extraction

The size of your coffee grounds is important to extract flavor, whether you're making a French press, pour-over or drip brew. Uneven sizes of the grounds cause uneven extraction, creating an unbalanced cup.

As the beans move through a blade grinder, they are cut and shredded indiscriminately resulting in an uneven distribution of the grind particle sizes. A blade grinder can create a mixture of large fragments that are dust-sized, as well as everything else. Different grind sizes are extracted at different rates, resulting in an inconsistent and often bitter cup of coffee.

Inconsistency can cause problems when tamping or filtering. With a burr mill, you can achieve an evenly ground particle size allowing for more even tamping and filtration that prevents over-extraction and weak beers. With a blade ceramic grinder it is more difficult to achieve an even grind, and you might be tamping from side to side or using the Stockfleth method (which requires some time to master).

The high speed and heat produced by blade grinders is a different problem. The grounds can be burned and cause a bitter taste. Burr grinders generate less heat and are cooler, thus preserving the flavor of the beans.

The blade grinder has one final disadvantage: it is very easy to grind your beans to a fine. Continuously running the grinder produces heat, which can cause your grounds to become over-extracted, resulting in bitter beverages. To avoid this, always stop the grinder before switching it back on.

The use of a blade grinder is an efficient and inexpensive way to grind your own coffee at home but it's not the ideal option for those serious about their coffee brewing. For the best grinder machine results, it is recommended to use a burr mill and whole beans. Invest in your brewing experience and purchase an efficient grinder that will meet all your coffee needs!

If you're looking to upgrade your blade grinder, check out our top picks for top burr grinders available on the market. The type of grinder you choose will affect the quality of your brewing as well as the quality of your drink. Consider your budget, space and preferred method of brewing prior to making your decision.

Grounds burned Grounds

Blade grinders use sharp blades to grind the beans. The blade rotates at high speeds, like blenders. The blade's speedy movement creates heat, which could burn some of the coffee grounds. These burned particles aren't ideal for the brewing process and can leave a bitter taste in your cup of coffee.

A top-quality coffee experience requires an even distribution of particles to ensure optimal flavor extraction during the brewing process. Because the blade grinder breaks the beans into different sized pieces, small and large it is impossible to achieve this consistency. A burr grinder however ensures a uniform distribution of particles that is reproducible over a wide range of brews.

Blade grinders have many advantages, including their low price and quick operation. However, they also have a few disadvantages, such as the fact that they generate heat when used and produce different grind sizes and are not able to control the final particle size. There are ways to improve the results using this type of grinder despite its inherent limitations.

When a burr mill, the user is able to easily adjust their desired ground size by adjusting the gap between the discs. This lets them extract the desired flavours every time they drink their favorite coffee beans. It requires a lot of practice to create a quality beverage using a blade grinder.

An angle grinder is a potent tool that should be used only by qualified personnel. It can cause grinding burn when employed incorrectly. This can cause localized changes to the surface of the metallographic material. This can lead to cracking that, if unchecked could eventually lead to macropitting and tooth fracture.

Grinding burn can result from a variety of factors, including excessive grinding pressure or inadequate cooling. It could also be caused by poor instruction for the operator. If you are planning to use an angle grinder, make sure you wear the correct PPE such as gloves with a face shield safety glasses, steel-toe boots and long sleeves. This will prevent hot sparks from flying out of the wheel and striking nearby equipment or people. The sparks can be as hot as 3,600 degF and are capable of burning through the materials like paint or even metal.

Brew that is disappointing

A blade grinder chops up your beans in a random fashion and leaves you with ground that vary in size. The ground is extracted at different rates, resulting in the cup being bitter or weak of coffee. This affects the balance of a good cup. The soluble components from your beans are extracted slowly and create the flavor.

You've likely been told that using a burr grinder instead of a blade is the best way to ensure an excellent drink. But many people don't know how to use a burr mill or even what it can do, so they buy one of the inexpensive, inflexible, blade grinders that are easily found in grocery stores and kitchen-type places.

Basically, these cheap grinders have a double-pronged blade at the bottom of a chamber that spins quickly and chops anything it hits such as coffee beans. Press a button to activate the device and the blade chops up your beans into a variety of differently sized pieces. Small pieces are pushed to the bottom of the chamber, and are again chopped, while the larger pieces remain at the top. This causes uneven ground which are difficult to measure accurately - which is why you can't be sure of how much ground coffee your grinder produced.

Another issue with these grinders is that they generate lots of heat when they grind, which could cause the beans to burn and ruin your coffee. The heat can also take away some of the flavor your beans, and you're left with a mediocre cup of coffee.

If you have grind your coffee by yourself with a blade mill, it's time to upgrade to something more efficient. A burr grinder will do the job at a fraction of the price and will give a superior result. It's worth it. If you're looking to have more control over your beverage, try a manual burr grinder, such as the Rhino hand grinder. These grinders have burrs, however, they are powered by a crank. This gives you more control than an electrical or plug-in grinder.