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Blade Grinder – Why You Shouldn't Use One Blade grinders use a propeller-like blade (think blenders) to chop coffee beans. They are cheaper than burr grinders, and are easy to clean but they don't produce uniform ground and can lead to over-extraction and bitterness in your coffee. A top-quality coffee experience requires uniform distribution of the particles, something that can only be achieved with the burr grinder. It's no wonder coffee people who are snobs dislike them. Inconsistent Grinds You may have noticed that your grinding results aren't consistent if you've been using a blade grinder for a long time. The machine is likely to wear out and dull. As the grinder wears down it will break up beans into different-sized pieces. This results in ground with different degrees of coarseness. It's difficult for your coffee maker to extract an even, balanced flavor due to the different sizes of the particles. A blade grinder uses the same propeller-like blade to break the beans. It chops beans into smaller and smaller pieces which are then tossed into a catcher through a screen. This technique is efficient however it's not the most efficient grind for your brew. A better alternative is a burr grinder. A burr grinder has an efficient motor that has two grinding burrs and is a much larger machine. best espresso grinder Coffeee can be placed to a certain distance, which will determine the coarseness of the coffee that is ground. If the burrs are close together, they will pulverize the beans, rather than cutting them. This results in a finer more refined, less coarse ground. They may also be brittle, which can affect the flavor of your coffee. On the other side when the burrs are spaced too far apart, they will create large chunks of coarsely-ground coffee. It is essential to select the coffee grinder with an appropriate setting to match the degree of coarseness you prefer. A sharp blade, adjusted properly, will produce a fine and consistent grind for your coffee. If you notice that your grind is becoming more uneven, it might be time to replace the burrs or blade. You should also consider changing the grind setting if you haven't before to allow you to achieve an even grind. If your grinder produces clumped up grounds this could be a sign the blades are worn out or damaged. The clumping is caused by tiny particles bonded to one another and larger pieces of grounds making larger granules that aren't able to dissolve in water. As your burrs grow and more dull this will happen more frequently. Uneven Extraction Whether you're brewing drip, French press, or pour-over, the size of your grounds 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 sliced and shredded in a random manner when they go through a blade mill, which results in an unbalanced distribution of the size of the grind particles. A blade grinder may produce a mixture of large pieces, dust-sized particles, and everything else in between. Different grind sizes are extracted at different rates, which results in a sloppy and often bitter cup of coffee. Uneven distribution can cause problems when tamping or filtration. With a burr grinder you can get an evenly-sized particle size that allows for more even tamping and filtration, which helps prevent over-extraction and weak brews. It is harder to achieve an even grind using a blade grinder. You may have to tamp from side to side, or use the Stockfleth Method (which requires some practice). The high speed and heat produced by blade grinders are another problem. This can burn the grounds and create a bitter taste. Burr grinders produce less heat and are cooler, which preserves the flavor of beans. The blade grinder has one final disadvantage: it is very easy to grind your beans to a fine. Keeping the grinder running continuously generates a lot of heat, which can cause your grounds to become excessively extracted, leading to bitter brew. To avoid this, you should always stop the grinder prior to turning it back on again. Blade grinders are an easy and inexpensive method of grinding coffee at home. However they're not the best option for those who are serious about their brewing. You should stick to whole beans and use burr grinders for the most effective results. Invest in your the brewing experience and invest in a quality grinder that will satisfy every aspect of your coffee needs! If you're ready to upgrade from your blade grinder, look through our top choices for the best burr grinders on the market. Choosing the right type of grinder is a crucial choice that will impact your brewing and overall cup quality so take into consideration your budget, your space, and the method you prefer to use when deciding on the best grinder. Burned Grounds With a blade grinder, you're using a sharp blade that rotates like a blender at high speed to chop up the beans. The speed of the blade's movement generates heat, which can ignite some of the coffee grounds. These charred particles aren't good for the brewing process and will create an unpleasant taste in your cup of coffee. To ensure a top-quality experience an even distribution of particles is essential for optimal flavour extraction. Since the blade grinder breaks the beans into varying size pieces, large and small, it's impossible to get this level of consistency. A burr mill, on the other hand creates an even distribution of particle sizes that can be replicated across a variety of different brews. While the benefits of a grinder with blades include its low cost and quick operation, its clear drawbacks are that it generates heat during use, produces irregularities in the size of the grind, and has no control over the final particle size. There are ways to improve the results with this type of grinder, despite its inherent limitations. When used with a burr mill, the user can easily adjust their desired ground size by adjusting the distance between the discs. This lets them get all the desired flavors from their favorite roasted beans every time. However, creating a quality drink using a blade grinder is a process that requires a lot trial and trial and. An angle grinder is a potent tool that should be utilized only by qualified personnel. When operated incorrectly it can result in an unsafe condition known as grinding burn, that causes localized changes to the metallographic structure of the workpiece's surface. This can lead to cracking that should be checked. If not, it could lead to teeth fracture and macropitting. Grinding burn is a serious problem that can be caused by a variety of factors, including excessive grinding pressure, inadequate cooling or improper operator training. Wear the correct safety equipment when using an angle grinder. This includes safety glasses with a face shield as well as steel toe boots. This will prevent hot sparks from flying off the machine and hitting nearby people or equipment. These sparks are capable of reaching temperatures up to 3,600 degF and be destructive to materials like paint or even metal. Disappointing Brew A blade grinder will chop your beans indiscriminately and result in different-sized beans. These uneven grounds are extracted at different rates in your coffee maker, and this leads to the cup being weak or bitter of brew. This can ruin the balance of a good cup. The soluble components from your beans are slowly extracted making the flavor. You've probably heard that using a burr grinder instead of a blade grinder is the best method to ensure the best brew. Many people don't understand what a burr mill is. They purchase the cheap, uncontrollable blade grinders they can find in supermarkets and places like kitchens. The grinders that are available for sale are essentially an angled blade with two pronged edges that sit at the bottom of an enclosed chamber. It spins fast and cuts anything it comes in contact with, including beans. The blade is activated by pressing a button. It then chops your coffee beans into different sizes. Small pieces are tossed to the bottom, and are then chopped again, while the larger pieces stay towards the top of the chamber. This results in uneven grounds which are difficult to measure accurately. This is why you aren't certain of the amount of ground coffee your grinder produced. Another problem with these grinders is that they create plenty of heat as they grind, which can damage your beans and ruin the coffee you drink. The heat can also take away some of the flavor from the beans, which means you're left with a less-than-delicious cup of coffee. If you've been grinding your own coffee with a blade grinder and you're ready to get rid of it and upgrade to a better. A burr grinder can do the job for a fraction of the price and provide a better result. It's worth the investment. If you're looking to have more control over the brew, try a manual burr grinder, such as the Rhino hand grinder. These grinders feature burrs, however, they are powered by a crank. This gives you more control than a plug-in electrical grinder.