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Blade Grinder - Why You Shouldn't Use One

Blade grinders use a blade that looks like propellers (think blenders). They are used to chop coffee beans. They are cheaper than burr mills, and easier to clean, however they don't provide a uniform grind and can cause bitterness or excessive extraction in your coffee.

A first-class coffee experience demands uniform distribution of the particles, something that can only be achieved by using a burr grinder. It's no wonder that coffee snobs hate them.

Inconsistent Grinds

You may have noticed that your grinding results are inconsistent when you've used a blade grinder over a long period of time. The grinding device is likely wear out and dull. As the grinder wears out it will cut beans into various sizes. This can lead to different levels of coarseness. With the different sizes of coffee particles, it's difficult for your coffee maker to extract a balanced, consistent flavor.

A blade grinder cuts beans by rotating a blade that looks like propellers. It chops the beans up into smaller and smaller pieces which are then dropped into a catcher through the screen. Although this method is effective but it's not ideal for making the most perfect grind for your beverage. An alternative is a burr grinder. A burr grinder has an efficient motor, two grinding burrs and is a larger machine. The burrs can be set at a certain distance apart, which will determine the degree of coarseness of the ground coffee.

If the burrs get too close, they will smash rather than cut beans. The result is a finer, less coarse ground. They can also be brittle and alter the taste 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 choose the grinder that has a setting that corresponds to the desired coarseness.

A sharp, properly-adjusted blade will result in an even and fine grind for your coffee. If you notice that your grind is becoming increasingly uneven, it might be time to replace the burrs or blade. If you haven't already done this, you must also alter the grind setting in order to achieve an even grinding.

If your grinder produces clumped-up grounds this could be a sign that the blades are worn out or damaged. The clumping occurs due to small particles adhering to each other and larger pieces of ground making larger granules that do not dissolve well in water. This is more frequent as your burrs become duller.

Uneven Extraction

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

The beans are cut into pieces and shredded randomly as they move through a blade mill, resulting in an uneven distribution of grind particle size. A blade grinder creates a mix of larger fragments, small particles and everything between. The different sizes of grinds extract at uneven rates resulting in an inconsistent and often bitter cup of coffee machine with grinder.

Uneven distribution can cause problems when tamping or filtering. With a burr mill, you can get an evenly-sized particle size allowing for more uniform tamping and filtering which prevents over-extraction and weak brews. It is more difficult to achieve an even grind with a blade grinder. It is possible to stamp from side to side, or employ the Stockfleth Method (which requires some practice).

Another problem with blade grinders is their speed and heat generation. This could cause the ground to burn and produce a bitter taste. Burr grinders are cooler and don't produce the same amount of heat, which helps preserve the flavor of the beans.

The blade grinder has a final disadvantage: it is easy to grind your beans to a fine. Continuously running the grinder produces heat and will eventually cause your beans to be excessively extracted, leading to bitter beverages. To avoid this, always pause the grinder before turning it back on.

Using a blade grinder is an efficient and cost-effective method of grinding your coffee at home, however, it's not the best option for those serious about their coffee brewing. For the most effective results, you'll need to make use of a burr mill and whole beans. Invest in your making experience by purchasing a grinder that is of high-quality and will deliver on all your coffee needs!

If you're looking to upgrade from your blade grinder, look through our top picks for the Best burr Grinder burr grinders on the market. The kind of grinder you pick will affect the quality of your brewing and your beverage. So, think about your budget, space and preferred brewing method before making your decision.

Grounds Burned Grounds

With the blade grinder it's a sharp blade that spins like a blender at high speed to chop up the beans. As the blade moves at a rapid pace it produces heat that could cause the burning of the coffee grounds. These charred particles aren't good for the brewing process and can cause a bad taste in your cup of coffee.

A premium coffee grinder compact experience demands a uniform particle distribution to ensure optimal flavor extraction during the brewing process. This consistency is not achievable with a blade grinder, which breaks the beans into small and large pieces. A burr grinder however, achieves a uniform distribution of particles that can be replicated over a wide range of types of brews.

While the advantages of a blade grinder are its low price and fast operation, its clear disadvantages are that it produces heat during use, produces irregularities in the size of the grind, and has no control over the final particle size. There are ways to increase the efficiency using this type of grinder despite its inherent limitations.

When using a burr mill, the user is able to easily adjust their desired grind size by adjusting the gap between the discs. This allows users to extract the desired flavor every time from their favorite roast beans. However, creating a quality drink using a blade grinder takes a lot of trial and error.

An angle grinder is a powerful tool that should only be used only by trained personnel. When operated incorrectly it could cause the dangerous condition known as grinding burn, that causes localized changes to the metallographic structure of the workpiece's surface. This could lead to cracks that, if unchecked will eventually lead to macropitting and tooth fracture.

Grinding burn can result from a variety of reasons, such as excessive grinding pressure or insufficient cooling. It can also be caused by improper operator training. If you intend to use an angle grinder, be sure you wear the correct PPE, including gloves and a face shield, safety glasses, steel-toe boots and long sleeves. This will prevent hot sparks from flying out of the wheel and hitting nearby people or equipment. Sparks can be capable of reaching temperatures as high 3,600 degrees Fahrenheit, and they can cause damage to materials such as paint or metal.

Brew that is disappointing

A blade grinder can chop your beans up indiscriminately and leave you with different-sized ground. These uneven grounds extract at different rates in your coffee maker, and this leads to an unpalatable or weak cup of brew. This affects the balance of a good cup. The soluble compounds from the beans are extracted slowly and create the flavor.

You've likely heard that using a brewing burr grinder instead of a blade is the best coffeee grinder way to ensure an excellent drink. Many people don't understand what a burr grinder does. They buy the cheapest blade grinders that are uncontrollable and difficult to control they can find in supermarkets and places that are kitchen-like.

In essence, these grinders have a blade with two pronged at the bottom of the chamber that spins fast and chops up anything it hits such as coffee beans. The blade is activated by pressing the button. It then chops your coffee beans into different size pieces. The small pieces are pushed to the bottom of the chamber and are chopped again, while the larger pieces remain at the top. This causes uneven ground that are difficult to accurately measure - which is the reason you can't be certain of the amount of ground coffee your grinder made.

Another issue with these grinders is that they create plenty of heat as they grind, which can damage your beans and ruin your coffee. The heat can also rob some of the flavor of your beans. This leaves you with an unappetizing cup of coffee.

If you've grind your own coffee using a blade grinder and you're ready to get rid of it and upgrade to something better. A burr mill can do the job for a fraction of the cost, and provide the same results. It's worth it. Try using a manual burr mill grinder mill such as the Rhino Hand Grinder if would like to have more control over your brew. These grinders are equipped with burrs, however they are powered by a crank, which provides more control than an electric or plug-in grinder.