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Blade Grinder – Why You Shouldn't Use One Blade grinders use blades that resemble propellers (think blenders). They are used to chop coffee beans. They are less expensive than burr mills and easy to clean, however they don't provide a uniform grind and can cause bitterness or excessive extraction in your coffee. To get the best coffee experience, you require uniform distribution of the particles. This can only be achieved using a burr mill. It's no wonder coffee experts hate them. Inconsistent Grinds If you've been using a blade grinder for some time there's a good chance that your grinding results have changed. This is because the grinding device has probably become dull and worn out. As the grinder ages it will produce different sized pieces of beans. This produces grounds with varying degrees of coarseness. With these various-sized coffee particles, it's hard for your coffee maker to extract a balanced, consistent flavor. A blade grinder uses the same propeller-like blade to break the beans. It chops beans into smaller and smaller pieces, which are then put into a catcher through a screen. Although this method is effective but it's not ideal for making the most perfect grind for your beverage. A better alternative is a burr grinder. A burr grinder has a powerful motor with two grinding burrs, and is a much larger machine. The burrs are placed at the exact distance from one another and this determines the degree of coarseness of the coffee you grind. If the burrs are too close together, they will pulverize the beans instead of cutting them. coffee beans and grinder resulting grounds are less coarse and finer. They can also be brittle and affect the taste of your coffee. On the other however if the burrs are spaced too spread out, they will result in large chunks of coarsely-ground coffee. It's crucial to choose a grinder that has a setting that matches the level of coarseness you want. A sharp, properly adjusted blade will yield a consistent and fine grind for your coffee. If you notice that your grind is becoming increasingly uneven, it could be time to replace the burrs or blade. You should also consider changing the grind setting in case you haven't already to allow you to achieve an even and consistent grind. If your grinder is producing clumped-up grounds this could be a sign that the blades have worn out or damaged. The clumping happens when tiny particles bind to one another, and larger pieces of ground, creating larger granules which don't dissolve in water. As your burrs become more and more dull, this will occur more often. Uneven Extraction No matter if you're using drip, French press, or pour-over the size of your ground plays an important role in flavor extraction. Uneven sizes of the grounds can result in uneven extraction and an unbalanced cup of coffee. The beans are cut and shredded randomly when they go through a blade mill, which results in an uneven distribution of grind particle size. A blade grinder may produce an assortment of large fragments that are dust-sized, as well as everything between. Different grind sizes produce at a different speed, creating the cup of coffee that is often bitter and inconsistent. In addition, the lack of uniformity causes problems with filtering and tamping. With a burr mill, you can get an even particle size, allowing better tamping and filtration which can prevent excessive extraction. With a blade grinder it is more difficult to get an even grind. You might be tamping from side to side or using the Stockfleth method (which requires some practice). Another problem with blade grinders is their high speed and the generation of heat. This could cause the ground to get burned and create a bitter taste. Burr grinders are cooler and don't produce the same amount of heat, which preserves the flavor of the beans. The blade grinder has one final disadvantage: it is easy to grind your beans to a fine. Running the grinder continuously produces a lot of heat, which can cause your beans to be over-extracted, resulting in bitter brew. To avoid this, you should always pause the grinder before turning it back on. Blade grinders are a convenient and inexpensive method of grinding coffee at home. However they're not the best option for those who are serious about their coffee brewing. You should stick to whole beans and a burr grinder for the most effective results. Make sure you purchase a high-quality coffee grinder that meets all your requirements. If you're ready to upgrade from your blade grinder, look through our top choices for the top burr grinders available on the market. The type of grinder you choose will affect the quality of your brewing, as well as your cup. Consider your budget, space and preferred method of brewing prior to making your decision. Grounds Burned Grounds With the blade grinder, you're using a sharp blade that spins like a blender at a rapid speed to chop up the beans. The blade's speedy movement creates heat, which could burn some of the coffee grounds. The burned particles aren't suitable for the brewing process and can leave a bitter taste in your cup of coffee. A premium coffee experience demands uniform distribution of the particles for optimal flavour extraction during the brewing process. Because the blade grinder breaks the beans into different sized pieces, large and small it is impossible to achieve this level of consistency. A burr grinder, on the other hand, achieves a uniform distribution of particles that is reproducible over many types of brews. Blade grinders offer a variety of advantages, including their low cost and speedy operation. However, they do have some drawbacks like the fact that they create heat when used and produce different grind sizes, and lack control over the final particle size. There are ways to improve the results with this type of grinder despite its inherent limitations. When using a burr mill, the user can easily alter their desired ground size by adjusting the distance between the discs. This allows them to extract all of the desired flavours from their favourite roast beans every time. However, creating a quality brew with a blade grinder is a process that requires a lot trial and trial and. Angle grinders are powerful tools that should only be used by professionals. It could cause grinding burn if it is used improperly. This can cause localized changes to the metal surface of the workpiece. This can lead to cracking that, if not checked, could eventually cause teeth fracture and macropitting. Grinding burns can be caused by a variety of factors, including excessive grinding pressure or insufficient cooling. It can also be caused by poor training for operators. If you plan on using an angle grinder, make sure you wear the appropriate PPE such as gloves, a face shield, safety glasses, steel-toe boots and long sleeves. This will prevent hot sparks from flying off the tool and hitting equipment or people close by. Sparks can be capable of reaching temperatures up to 3,600 degF and cause damage to materials such as paint or metal. Brew that isn't great. A blade grinder can chop your beans indiscriminately and leave you with different-sized ground. The uneven ground extracts coffee at different rates, resulting in the cup being bitter or weak of coffee. This can ruin the balance of a fantastic 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 way to ensure a great drink. Many people aren't aware how to use a burr grinder or even what it does so they opt to buy one of the inexpensive, inflexible, blade grinders that are readily available in grocery stores and kitchen-type places. These cheap grinders are essentially an angled blade with two pronged edges that sit located at the bottom of an enclosed chamber. It spins quickly and cuts anything it comes in contact with, including your beans. Press a button to start the grinder and the blade cuts up your beans into a plethora of differently sized 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 results in uneven grounds that are difficult to accurately measure – which is the reason you can't be sure of how much ground coffee your grinder made. These grinders can also burn your beans, ruining your coffee. The heat also removes some of the flavor of your beans, so you're left with a less-than-delicious cup of coffee. If you've grind your own coffee with a blade grinder and you're ready to get rid of it and upgrade to a better. A burr grinder will accomplish the trick for a fraction of the price and provide a better result. It's worth it. If you want more control over the brew Try a manual grinder, such as the Rhino hand grinder. These grinders feature burrs but are powered by turning the crank, which gives more control than a plug-in or electric grinder.