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Blade Grinder – Why You Shouldn't Use One Blade grinders use propeller-like blades (think blenders) to chop coffee beans. They are cheaper than burr grinders and easy to clean but don't produce uniform ground and can lead to over-extraction and bitterness in your brew. A first-class coffee experience demands uniform distribution of the particles and this can only be achieved with the use of a burr grinder. This is the reason why coffee snobs loathe burr grinders. Inconsistent Grinds You may have noticed that the results of your grinding aren't always consistent in the event that you've used a blade grinder over a long time. The grinding device is likely be worn out and dull. As the grinder wears out it will cut beans into different sizes. This will produce grounds with different levels of coarseness. It's a challenge for your coffee brewer to create a consistent, balanced flavor with these various-sized particles. Blade grinders use the same propeller-like blade to break beans. It is basically a way of cutting beans into smaller and smaller pieces, which are then dropped through a screen and into the catcher. This method is effective however it's not the finest grind possible for your brew. A better option is a burr grinder. A burr grinder is a much larger machine that has a powerful motor and two grinding burrs. The burrs are set to a certain distance and will determine the coarseness of the ground coffee. When the burrs are too close together, they will pulverize the beans rather than cut them. As a result, the resultant grounds are less coarse and more fine. They may also be brittle and alter the taste of your coffee. If the burrs on the other hand are not evenly spaced they will result in large chunks of coarsely ground coffee. It's important to choose a grinder that has a setting that corresponds to the coarseness you want. A sharp blade, if adjusted correctly, will result in a fine and consistent grind for your coffee. If you notice your grind becoming increasingly more uneven, it's best to replace the blade or burrs. You should also think about changing the grind setting in case you haven't previously, as this will help you achieve an even and consistent grind. It's also worth noting that if your machine produces clumped up grounds this could be an indication of worn or damaged blades. The clumping occurs due to tiny particles bonded to one another and larger pieces of grounds making larger granules that do not dissolve well in water. This will happen more often as your burrs get duller. Uneven Extraction No matter if you're using drip, French press, or pour-over the size of your grounds plays an important role in flavor extraction. Uneven ground sizes lead to uneven extraction and an unbalanced cup of coffee. As the beans circulate through a blade grinder, they are sliced and shredded indiscriminately resulting in an uneven distribution of grind particle sizes. A blade grinder may produce a mixture of large pieces, dust-sized particles, and everything else. Different grind sizes are extracted at different rates, leading to an inconsistent and often bitter cup of coffee. In addition, the lack of uniformity results in problems with tamping and filtration. With a burr grinder you can attain an evenly-sized particle size that allows for more even tamping and filtration, which helps prevent over-extraction and weak beers. If you use a blade 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). Another problem with blade grinders is their speed and the generation of heat. This could cause the ground to get burned and produce an bitter flavor. Burr grinders create less heat and are cooler, thus preserving the flavor of beans. The blade grinder has one last disadvantage: it is easy to grind your beans too fine. Running the grinder continuously produces heat, and eventually causes your grounds to become excessively extracted, leading to a bitter brew. To avoid this, you should always stop the grinder before turning it back on. Blade grinders are a simple and inexpensive method of grinding coffee at home. However, they're not the best option for those who are serious about their coffee-brewing. It is recommended to use whole beans and a burr grinder to get the most effective results. You should invest in your making experience by purchasing an efficient grinder that will meet every coffee need! If you're looking to upgrade your blade grinder, look through our top picks for best burr grinders on the market. The kind of grinder you select will impact the quality of your brewing as well as the quality of your drink. So, consider your budget, space and preferred method of brewing before making your decision. Burned Grounds With the blade grinder, you're using a sharp blade that spins like a blender at a rapid speed to cut the beans. As the blade rotates at a quick pace it produces heat that could cause the burning of the coffee grounds. These charred particles aren't good for brewing and will create an unpleasant taste in your cup of coffee. To ensure a top-quality experience, a uniform distribution of particles is essential for the best flavor extraction. This is not possible with a blade grinder that is able to break the beans into small and large pieces. A burr mill, on the contrary creates an even distribution of particle sizes that can be replicated across a variety of different brews. While the benefits of a blade grinder are its low cost and quick operation, its major disadvantages are that it creates heat when it is used, creates variations in the size of the grind and lacks control over final particle size. There are ways to improve results with this kind 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 they drink their favorite roast beans. However, creating a quality beverage using a grinder requires a lot of trial and trial and. An angle grinder is an extremely powerful tool that should be used only by qualified personnel. It could cause grinding burn if it is used improperly. This causes localized changes to the metal surface of the workpiece. This can cause cracking and is not properly checked, could eventually cause macropitting and teeth fracture. Grinding burns can be caused by many reasons, such as excessive grinding pressure or insufficient cooling. It can also be caused by poor 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 off the wheel and striking nearby people or equipment. These sparks are capable of reaching temperatures as high 3,600 degF, and can cause damage to materials such as paint or even metal. Brew that is disappointing A blade grinder cuts your beans in a random fashion and leaves you with ground that are all different sizes. The uneven ground extracts coffee at different rates, resulting in a weak or bitter cup of coffee. This ruins the balance of a great cup. The soluble compounds from your beans are extracted slowly and create the flavor. You've likely heard that using a burr grinder instead of a blade is the best way to ensure a great drink. But many people don't know how to use a burr mill or even what it can do and so they purchase one of the cheap, uncontrollable blade grinders easy to find in supermarkets and other kitchen-type places. These cheap grinders are essentially a two-pronged blade that is located at the bottom of an enclosed chamber. It spins fast and chops everything it comes into contact with, including beans. You press a button to activate it, and the blade chops up your beans into a bunch of different-sized pieces. Small pieces are tossed to the bottom, and get chopped all over again, while the larger pieces remain towards the top of the chamber. coffee grinders makers causes uneven grounds that are difficult to measure. Another issue with these grinders is that they produce a lot of heat while they grind, which could damage your beans and ruin your coffee. The heat also removes some of the flavor your beans, so you're left with a bland cup of coffee. If you've grind your own coffee using a blade grinder, it's time to retire it and upgrade to a better. A burr mill will do the job for a fraction the price, and produce the same results. It's worth it. If you want more control over your beverage try a manual burr grinder like the Rhino hand grinder. These grinders are equipped with burrs, but are powered by turning a crank, which provides more control than a plug-in or electric grinder.