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Blade Grinder – Why You Shouldn't Use One Blade grinders have blades that resemble propellers (think blenders). They are used to chop coffee beans. They are less expensive than burr grinders and are easy to clean, but they do not produce uniform grounds and can cause excessive extraction and bitterness in your coffee. For a first-class coffee experience, you must have uniform distribution of particles. This is only possible using a burr mill. This is the reason why coffee snobs hate burr grinders. Inconsistent Grinds You might have noticed that the results of your grinding aren't always consistent when you've used a blade grinder over a long time. This is because the machine is likely to have become worn out and dull. As the grinder wears down, it will chop up beans into various sizes. This produces grounds with varying levels of coarseness. It's difficult for your coffee brewer to get a consistent, balanced flavor with these different-sized particles. A blade grinder cuts beans using a rotating blade that appears like propellers. It basically chops the beans into smaller and smaller pieces and then drops them through a filter into the catcher. This method is efficient however it doesn't provide the finest grind possible for your drink. An alternative is a burr grinder. A burr grinder has powerful motors, two grinding burrs and is a bigger machine. The burrs are set to an exact distance from one another which determines the fineness of your ground coffee. If the burrs get too close, they will smash rather than cut beans. The result is a finer and less coarse grind. They can also be brittle, which can affect the flavor of your coffee. If the burrs, on the other hand are too dispersed they will result in large chunks of coarsely ground coffee. It is important to select a grinder that has a setting that is in line with your desired coarseness. A sharp blade, when adjusted properly, will create 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 the blade. If you haven't already done so, you should also alter the grind setting in order to achieve more even grinding. If your grinder is producing clumped-up grounds this could be a sign the blades are worn out or damaged. The clumping happens due to tiny particles sticking to each other and larger pieces of ground, creating larger granules that do not dissolve well in water. As your burrs get more and dull this is more frequent. Uneven Extraction The size of your coffee grounds is vital for flavor extraction, regardless of whether you're using a French press pour-over, drip brew or pour-over. 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, which results in an unbalanced distribution of grind particle size. A blade grinder creates an assortment of larger fragments, small particles and everything between. Different grind sizes extract at an uneven speed, creating the cup of coffee that is usually bitter and inconsistent. In addition, the lack of uniformity results in problems with filtering and tamping. With a burr mill, you can achieve an evenly ground particle size allowing for more uniform tamping and filtering, which helps prevent over-extraction and weak beers. With a blade grinder, it is more difficult to achieve an even grind. You may be tamping from side to side or using the Stockfleth method (which requires some time to master). The high speed and the heat produced by blade grinders is another issue. This can burn the grounds and create a bitter taste. Burr grinders create less heat and are cooler, preserving the flavor of the beans. A final downside of a blade grinder is that it's extremely easy to over-grind your beans. Continuously running the grinder generates a lot of heat, and eventually causes your beans to be excessively extracted, which can result in bitter brew. To avoid this, always pause your grinder before switching it back on. The use of a blade grinder is an efficient and affordable method of grinding your coffee at home, but it's not the best choice for those who are serious about their coffee brewing. For the best results, you'll want to utilize a burr mill as well as whole beans. Consider investing in a top coffee grinder that will meet all your requirements. Check out our top picks of the best burr mills on the market to upgrade your blade grinder. Choosing the right type of grinder is a major choice that will impact your brewing and overall cup quality, therefore, you should consider your budget, space, and the method you prefer to use when making your decision. Grounds Burned Grounds With a blade grinder is a sharp blade that spins like a blender at a rapid speed to break up the beans. As the blade moves at a rapid pace, heat is produced which can cause a fire to the grounds of coffee. These burned particles aren't ideal for the brewing process and can leave a bitter taste in your coffee. For a truly exceptional experience an even distribution of particles is required to ensure the best flavor extraction. This consistency is impossible with a blade grinder that is able to break the beans up into large and small pieces. A burr grinder, on the other hand ensures an even distribution of particles that can be replicated across a variety of different brews. While the benefits of a blade grinder include its low cost and quick operation, its clear drawbacks are that it generates heat when it is used, creates inconsistencies in grind size, and has no control over the final particle size. With a bit of practice however, there are ways to optimize results despite the inherent limitations of this kind of grinder. When using a burr mill, the user can easily adjust their desired grind size by adjusting the distance between the discs. This lets users to extract the desired flavor every time from their favourite roasted bean. It requires a lot of practice to make a good drink using a grinder blade. Angle grinders are powerful devices that should only be used by professionals. It could cause grinding burn if used incorrectly. This can cause localized changes to the metallographic surface of the workpiece. This can cause cracks that, if left unchecked, can eventually result in macropitting and tooth fracture. Grinding burns can result from a variety of factors, including excessive grinding pressure or insufficient cooling. It could also be caused by improper operator training. Wear the correct safety equipment when using an angle grinder. This includes safety glasses as well as a face shield and steel toe boots. This will stop any hot sparks from flying off the tool and hitting people or equipment close by. These sparks are capable of reaching temperatures as high as 3,600 degrees Fahrenheit, and they can be destructive to materials like paint or even metal. Brew that isn't great. A blade grinder chops up your beans randomly and leaves you with ground which are of different sizes. The unevenly sized grounds are extracted at different rates in your coffee maker and this leads to a bitter or weak cup of coffee. The issue with this is that it destroys the balance that makes a great cup of coffee. Soluble compounds in your beans are removed over time, resulting in the flavor that makes your coffee delicious. You've probably heard that using a burr mill instead a blade mill is the best method to make a great beverage. Many people don't understand what a burr mill is. They buy the cheapest blade grinders that are uncontrollable and difficult to control they can buy at supermarkets and places like kitchens. The grinders that are available for sale are essentially two-pronged blades that are located at the bottom of an enclosed chamber. It spins quickly and chops everything it comes into contact with including your beans. The blade is activated by pressing an on. It then chops your coffee beans into various sized pieces. Small pieces drop to the bottom of the chamber and are then chopped up again, whereas the larger pieces remain at the top. This causes uneven grounds that are difficult to determine. electric coffee grinder can also cause burns to your beans, ruining your coffee. The heat can also remove some of the flavor of your beans. This leaves you with not the best cup of coffee. If you've grind your own coffee with a blade grinder, it's time to retire it and upgrade to something better. A burr grinder can do the job at only a fraction of the cost and will give a superior result. It's worth it. If you're looking for more control over the brew, try a manual burr grinder, such as the Rhino hand grinder. These grinders have burrs, but are powered by turning the crank, which gives more control than an electric or plug-in grinder.